Updated on 2026/04/04

写真a

 
NOGUCHI YUTAKA
 
Organization
Undergraduate School School of Science and Technology Professor
Title
Professor
Homepage
http://www.isc.meiji.ac.jp/~molele/
External link

Degree

  • Doctor of Engineering ( Tokyo Institute of Technology )

Research Areas

  • Nanotechnology/Materials / Organic functional materials

  • Manufacturing technology (mechanical,electrical/electronic, chemical engineering) / Electric/electronic material engineering

Professional Memberships

Committee Memberships

  • International Display Workshop   代表実行委員  

    2023.4 - 2026.3   

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    Committee type：Academic society

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  • 有機EL討論会   業績賞・講演奨励賞審査委員  

    2022.6 - 2025.3   

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    Committee type：Academic society

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  • International Display Workshop   OLED WS プログラム委員  

    2020.4   

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    Committee type：Academic society

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  • 有機EL討論会   プログラム委員  

    2020.1   

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    Committee type：Academic society

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  • 有機EL討論会   プログラム委員長  

    2019.1 - 2019.12   

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    Committee type：Academic society

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  • 電気学会   A部門編修委員会幹事  

    2018.5 - 2020.3   

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    Committee type：Academic society

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  • 有機EL討論会   プログラム副委員長  

    2018.1 - 2018.11   

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    Committee type：Academic society

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  • 学振142委員会 C部会研究会   EL2018現地実行委員  

    2017.3 - 2018.9   

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  • 学振142委員会 C部会研究会   運営委員  

    2016.7 - 2020.3   

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    Committee type：Academic society

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  • 応用物理学会   有機分子バイオエレクトロニクス分科会 編集企画幹事  

    2016.4 - 2018.3   

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    Committee type：Academic society

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  • 有機EL討論会   講演会 会場担当  

    2013.2 - 2015.6   

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    Committee type：Academic society

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  • 応用物理学会   講演会プログラム編集委員  

    2010.9 - 2014.10   

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    Committee type：Academic society

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  • 応用物理学会   教育・公益事業委員会 委員  

    2008.4 - 2009.3   

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    Committee type：Academic society

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  • 応用物理学会   有機分子バイオエレクトロニクス分科会幹事  

    2007.4 - 2009.3   

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Papers

  • Light-Emitting Electrochemical Cells Based on Nanogap Electrodes Reviewed International journal

    Ryo Yonemoto, Rieko Ueda, Akira Otomo, Yutaka Noguchi

    Nano Letters   2023.8

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society  

    In a light-emitting electrochemical cell (LEC), electrochemical doping caused by mobile ions facilitates bipolar charge injection and recombination emissions for a high electroluminescence (EL) intensity at low driving voltages. We present the development of a nanogap LEC (i.e., nano-LEC) comprising a light-emitting polymer (F8BT) and an ionic liquid deposited on a gold nanogap electrode. The device demonstrated a high EL intensity at a wavelength of 540 nm corresponding to the emission peak of F8BT and a threshold voltage of ∼2 V at 300 K. Upon application of a constant voltage, the device demonstrated a gradual increase in current intensity followed by light emission. Notably, the delayed components of the current and EL were strongly suppressed at low temperatures (<285 K). The results clearly indicate that the device functions as an LEC and that the nano-LEC is a promising approach to realizing molecular-scale current-induced light sources.

    DOI： 10.1021/acs.nanolett.3c02001

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  • Charge-carrier Dynamics and Exciton-polaron Quenching Studied Using Simultaneous Observations of Displacement Current and Photoluminescence Intensity Reviewed International journal

    Yutaka Noguchi, Kaito Ninomiya, Katsuya Sato

    The Journal of Physical Chemistry C   126   18520 - 18527   2022.10

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ACS Publications  

    DOI： 10.1021/acs.jpcc.2c05871

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  • Controlling charge accumulation properties of organic light-emitting diodes using dipolar doping of hole transport layers Reviewed International coauthorship International journal

    Yutaka Noguchi, Alexander Hofmann, Wolfgang Brütting

    Advanced Optical Materials   2201278   1 - 10   2022.8

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley-VCH  

    It is demonstrated that dipolar doping of hole transport layers (HTLs) controls the density and polarity of the accumulated charge at the critical interface between the HTL and the emission layer (EML) in organic light-emitting diodes (OLEDs). Dipolar doping enables spontaneous orientation polarization (SOP) even in nonpolar HTL, and consequently compensates for the negative interface charge originating from the SOP of the adjacent layer. The results suggest that besides the energy level offset, SOP and permanent dipole moment of the materials should also be taken into account for realizing efficient carrier blocking interfaces. Dipolar doping is a versatile tool to tune charge accumulation, and to study its influence on device performance as well as the role of SOP in OLEDs.

    DOI： 10.1002/adom.202201278

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  • Simultaneous observation of the electrical and luminous characteristics of light-emitting electrochemical cells by using a displacement current measurement technique Reviewed International journal

    Yutaka Noguchi, Tetsuya Higeta, Fumihiro Yonekawa

    Advanced Optical Materials   6 ( 20 )   1800318   2018.6

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley-VCH  

    An extended displacement current measurement (DCM) is performed to analyze the operation mechanisms of a poly(p-phenylenevinylene) derivative (Super Yellow)-based light-emitting electrochemical cell (LEC). The characteristics of the actual current, displacement current, and electroluminescence (EL) intensity during the relaxation processes of electrochemical doping are simultaneously measured. The extended DCM enables us to comprehensively analyze the operation mechanisms of LECs on the basis of the simultaneous observations of electrical and luminous characteristics, including their transient changes.

    DOI： 10.1002/adom.201800318

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  • 変位電流と発光強度の同時測定によるIr錯体を用いた発光層の三重項-ポーラロン消光特性評価 Invited Reviewed

    中野 正太郎, 野口 裕

    映像情報メディア学会誌   79 ( 6 )   633 - 637   2025.11

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    Authorship：Last author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：一般社団法人映像情報メディア学会  

    われわれは，三重項-ポーラロン消光（TPQ）特性の評価法として変位電流と発光強度の同時測定法（DCM-PL法）を提案している．本研究では，代表的なリン光発光材料であるtris[2-phenylpyridine]iridium(III)(Ir(ppy)3)およびbis[2-(2-pyridinyl-N)phenyl-C](acetylacetonato)iridium(III)(Ir(ppy)2(acac))を用いた発光層にDCMPL法を適用し，電子および正孔蓄積に対するTPQ速度定数を見積もった．その結果，いずれの発光層の場合も，電子よりも正孔蓄積によるTPQ速度定数の方が大きく，同じ極性の蓄積電荷で比較すると，Ir(ppy)3の方がIr(ppy)2(acac)よりもTPQを引き起こし易いことがわかった．

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  • Impact of Spontaneous Orientation Polarization in the Emission Layer on the Charge Accumulation and Exciton−Polaron Quenching Properties of Ir-Complex-based Organic Light-Emitting Diodes Reviewed International journal

    Shotaro Nakano, Yutaka Noguchi

    ACS Applied Electronic Materials   7 ( 9 )   4182 - 4190   2025.4

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society  

    This study investigates the impact of spontaneous orientation polarization (SOP) in the emission layer (EML) on the charge accumulation and exciton-polaron quenching (EPQ) characteristics of Ir-complex-based organic light-emitting diodes (OLEDs) using displacement current measurements combined with photoluminescence intensity measurements and device simulations. A significant SOP is induced in the EML depending on the SOP-active material content, which modifies the accumulated charge distribution in the EML. Notably, the SOP can suppress the EPQ, particularly when the energy offset at the interface between the hole transport layer and the EML is small. These findings highlight the importance of SOP in optimizing the OLED device performance.

    DOI： 10.1021/acsaelm.5c00355

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  • Enhancement of Spontaneous Orientation Polarization in Glassy Organic Semiconductor Mixtures Invited Reviewed International coauthorship International journal

    Alexander Hofmann, Albin Cakaj, Lea Kolb, Yutaka Noguchi, Wolfgang Brütting

    The Journal of Physical Chemistry B   129 ( 2 )   779 - 787   2025.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ACS Publications  

    The alignment of permanent dipole moments and the resulting spontaneous orientation polarization (SOP) are commonly observed in evaporated neat films of polar organic molecules and lead to a so-called giant surface potential. In the case of mixed films, often enhanced molecular orientation is observed, i.e., a higher degree of alignment, in comparison to neat layers, if it is diluted into a suitable (nonpolar) host. So far, different possible influences on molecular orientation have been discussed, with the most prominent probably being the so-called surface equilibration model. In this contribution, we discuss how surface equilibration can influence orientation in mixed layers and which other intermolecular interactions have to be considered to explain the observed enhancement of SOP in mixed layers.

    DOI： 10.1021/acs.jpcb.4c07138

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  • Degradation properties of organic light-emitting diodes with modified interface charge density via dipolar doping studied by displacement current measurement Reviewed International coauthorship International journal

    Mihiro Takeda, Alexander Hofmann, Wolfgang Brütting, Yutaka Noguchi

    Advanced Electronic Materials   11   2400788   2025.1

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley-VCH  

    This work delves into the correlations of the interface charge accumulation and degradation properties of Alq3-based OLEDs. The interface accumulated charge density is modified by SOP induced in the HTL by means of dipolar doping. It is confirmed that NPB cation acts as an exciton quencher, but TCTA cation does not, depending on the spectral overlap of Alq3 emission and the absorption of the respective cations. On the other hand, the TCTA devices degrade much faster than the NPB devices. Moreover, the device lifetime is similar or even shorter for the doped devices despite less interface charge density. These results suggest that holes accumulated at the interface between the hole transport material and Alq3 due to SOP are not mainly involved in the degradation mechanism. Furthermore, it is found that the charge traps generated due to degradation do not act as exciton quenchers, suggesting that they rather act as nonradiative recombination centers.

    DOI： 10.1002/aelm.202400788

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  • Angular Distribution Analysis of Permanent Dipole Moments in Amorphous Organic Semiconductor Film with Large Spontaneous Orientation Polarization Reviewed International journal

    Yuro Yagi, Yutaka Noguchi, Daisuke Yokoyama

    The Journal of Physical Chemistry C   2024.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society  

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  • Controlling charge accumulation properties at organic hetero-interfaces using dipolar doping of hole transport layers International coauthorship International journal

    Yutaka Noguchi, Mihiro Takeda, Alexander Hofmann, Wolfgang Brütting

    Proceedings of SPIE   12659   1265905-1 - 1265905-5   2023.10

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    Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)  

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  • Electrically induced light emission via nanoscale vacuum discharge in nanogap electrodes without luminescent molecules Reviewed International journal

    Ryo Yonemoto, Toma Babe, Rieko Ueda, Akira Otomo, Yutaka Noguchi

    Journal of Applied Physics   132   174303   2022.11

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AIP publishing  

    DOI： 10.1063/5.0102395

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  • Understanding spontaneous orientation polarization of amorphous organic semiconducting films and its application to devices Invited Reviewed

    Yutaka Noguchi, Yuya Tanaka, Hisao Ishii, Wolfgang Brütting

    Synthetic Metals   288   117101 - 117101   2022.8

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.synthmet.2022.117101

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  • Molecular orientation anisotropy and hole transport properties of diluted semiconducting films of poly(<I>p</I>-phenylenevinylene) derivative Reviewed International journal

    Seiya Demura, Tatsuro Endo, Takumi Ishii, Daisuke Yokoyama, Yutaka Noguchi

    Organic Electronics   96   106246   2021.9

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier  

    Anisotropy of hole transport property was found in the diluted polymer films.
    Anisotropy in the diluted films strongly depends on the inert host material.
    Anisotropy is an important factor for understanding the hole transport properties.

    DOI： 10.1016/j.orgel.2021.106246

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  • Active refractive index control using a stably evaporable perfluororesin for high-outcoupling-efficiency organic light-emitting diodes Reviewed International journal

    Daisuke Yokoyama, Tatsuki Sasaki, Yasutaka Suzuki, Takefumi Abe, Kaori Tsuruoka, Tatsuya Miyajima, Toshifumi Kakiuchi, Chiho Morita, Masaharu Aoki, Yasuhiro Ouchi, Wataru Aita, Yasuhiro Kuwana, Yutaka Noguchi

    Journal of Materials Chemistry C   9   11115 - 11125   2021.7

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    Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry  

    Here, a method is proposed for outcoupling enhancement that actively controls the refractive index of a hole transport layer (HTL) in OLEDs using a stably evaporable perfluororesin, which has a low refractive index and high amorphousness. Using the low-index co-deposited HTL, a 1.22-fold enhancement of the outcoupling efficiency of a phosphorescent OLED is demonstrated. The proposed method can be generally applied to OLEDs to significantly enhance their outcoupling efficiency without increasing process cost. The results show the potential of active refractive index control as a major strategy for achieving further high-efficiency OLEDs.

    DOI： 10.1039/D1TC02478G

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  • Effect of chemically induced permittivity changes on the plasmonic properties of metal nanoparticles Reviewed International journal

    Noboru Saito, Sou Ryuzaki, Yuta Tsuji, Yutaka Noguchi, Rintaro Matsuda, Pangpang Wang, Daisuke Tanaka, Yusuke Arima, Koichi Okamoto, Kazunari Yoshizawa, Kaoru Tamada

    Communications Materials   2 ( 54 )   1 - 8   2021.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Nature  

    DOI： 10.1038/s43246-021-00159-6

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  • Investigating Bulk-to-Interface Doping Relaxation in Light-Emitting Electrochemical Cells via Displacement Current Measurements Reviewed International journal

    Hayato Iwakiri, Hotaka Watanabe, Yutaka Noguchi

    ACS Applied Electronic Materials   3 ( 5 )   2355 - 2361   2021.5

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ACS publications  

    In the present work, this extended DCM method was employed for Super Yellow-based LECs with two typical active layer thicknesses of approximately 60 and 120 nm, and the relaxation processes of the resulting devices were investigated. In the thick-film device, the deterioration of the luminous efficiency was dominated by the optical processes of self-absorption and exciton–polaron quenching, whereas in the thin-film device, the deterioration was facilitated by the electronic process of carrier injection. The carrier balance factor was critical to the luminous efficiency of the thin-film device under reverse-bias operation, although this was not the case for the thick-film device. The results indicate that the ECD relaxation propagates from the bulk to the interface and confirm that the active layer thickness is a major factor in the maintenance of efficient carrier injection. The extended DCM method is a promising approach for analyzing the dynamic and complex properties of LECs.

    DOI： 10.1021/acsaelm.1c00237

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  • Oxidative Vaporization Etching for Molybdenum Tip Formation in Air Reviewed International journal

    Yuto Goto, Rie Suizu, Yutaka Noguchi, Toyo Kazu Yamada

    Applied Surface Science   542   148642   2021.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier  

    •Oxidative vaporization controls a Mo tip formation within a second in air.
    •Generation and immediate vaporization of MoO<SUB>3</SUB> is a driving force.
    •Temperature gradient in a flame determines a tip sharpness.
    •The Mo tips were used for STM, field emission, and conductance measurements.

    DOI： 10.1016/j.apsusc.2020.148642

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  • Enhancement of the molecular orientation of TPBi in coevaporated films of UGH‐2 host molecules Reviewed International coauthorship International journal

    Hewa Dewage Chandima Niroshan Gunawardana, Kohei Osada, Kaveenga Rasika Koswattage, Yutaka Noguchi

    Surface and Interface Analysis   53 ( 4 )   460 - 465   2021.1

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    In this study, we investigated the spontaneous orientation polarization (SOP) in coevaporated films of polar and nonpolar molecules. We found that the molecular orientation of TPBi in both UGH‐2 and CBP hosts was enhanced, though the apparent enhancement factor was small in the UGH‐2 host. The enhancement of the molecular orientation is attributed to the reduction of the electrostatic interaction between polar molecules (TPBi), which deteriorates SOP as previously reported. In addition, our results suggest that the SOP of TPBi is robust even in the UGH‐2 host, in contrast to the random orientation of Ir complexes in the UGH‐2 host. Considering a polyhedral shape of Ir complexes, the robust SOP of TPBi in the host molecules with a weak van der Waals interaction, such as UGH‐2, is possibly due to its disk‐like molecular shape.

    DOI： 10.1002/sia.6933

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  • Influence of intermolecular interactions on the formation of spontaneous orientation polarization in organic semiconducting films

    Yutaka Noguchi, Kohei Osada, Kaito Ninomiya, Hewa D. C. N. Gunawardana, Kaveenga R. Koswattage, Hisao Ishii

    JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY   29 ( 1 )   29 - 37   2021.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/jsid.956

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  • Bubble-Free Transfer Technique for High-Quality Graphene/Hexagonal Boron Nitride van der Waals Heterostructures Reviewed International journal

    Takuya Iwasaki, Kosuke Endo, Eiichiro Watanabe, Daiju Tsuya, Yoshifumi Morita, Shu Nakaharai, Yutaka Noguchi, Yutaka Wakayama, Kenji Watanabe, Takashi Taniguchi, Satoshi Moriyama

    ACS Applied Materials & Interfaces   12 ( 7 )   8533 - 8538   2020.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.9b19191

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  • Topological valley currents in bilayer graphene/hexagonal boron nitride superlattices Reviewed

    Kosuke Endo, Katsuyoshi Komatsu, Takuya Iwasaki, Eiichiro Watanabe, Daiju Tsuya, Kenji Watanabe, Takashi Taniguchi, Yutaka Noguchi, Yutaka Wakayama, Yoshifumi Morita, Satoshi Moriyama

    Applied Physics Letters   114 ( 24 )   243105_1 - 243105_4   2019.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.5094456

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  • Photocontrollable ambipolar transistors with π-conjugated diarylethene photochromic channels Reviewed

    Y. Kurokawa, R. Hayakawa, S. Shimada, K. Tanaka, K. Higashiguchi, Y. Noguchi, K. Matsuda, Y. Wakayama

    Jpn. J. Appl. Phys.   58   SDDH03   2019.5

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  • Spontaneous orientation polarization in organic light-emitting diodes

    Yutaka Noguchi, Wolfgang Brütting, Hisao Ishii

    Japanese Journal of Applied Physics   58   2019.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/1347-4065/ab0de8

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  • Ambipolar carrier transport in an optically controllable diarylethene thin film transistor Reviewed International journal

    Yuka Kurokawa, Ryoma Hayakawa, Shinya Shimada, Kenji Higashiguchi, Yutaka Noguchi, Kenji Matsuda, Yutaka Wakayama

    Organic Electronics   64   205 - 208   2019.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier  

    •Ambipolar operation is achieved in a diarylethene-channel transistor.
    •The gate voltage well controlled both hole and electron transport.
    •Ultraviolet or visible light irradiation realized a large modulation in both hole and electron currents.
    •The light-induced on/off ratio reached 240 for p-type operation and >25 for n-type operation.

    DOI： 10.1016/j.orgel.2018.10.020

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  • Observation of spontaneous orientation polarization in evaporated films of organic light-emitting diode materials Reviewed

    Kohei Osada, Kenichi Goushi, Hironori Kaji, Chihaya Adachi, Hisao Ishii, Yutaka Noguchi

    Organic Electronics: physics, materials, applications   58   313 - 317   2018.7

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier B.V.  

    DOI： 10.1016/j.orgel.2018.04.026

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  • Negative capacitance in an organic solar cell observed by displacement current measurement Reviewed

    Koji Shimizu, Yuya Tanaka, Yutaka Noguchi, Hisao Ishii

    Journal of Physics: Conference Series   924   012012 - 012012   2017.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    We applied displacement current measurement (DCM) to an organic solar cell (OSC) with a structure of ITO/CuPc/C60/BCP/Al in order to investigate the origin of a negative capacitance (NC). In DCM curve, an anomalous characteristic that the current in backward scan was larger than that in forward scan was observed. We found that this characteristic originates from a gradual increase of an additional current, leading to NC in DCM. The additional current can be explained by the increase of the device temperature owing to a Joule heat and thermal deactivation of the exciton. Moreover, NC value was observed to be enhanced by light irradiation due to an additional temperature increase.

    DOI： 10.1088/1742-6596/924/1/012012

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    Other Link： http://stacks.iop.org/1742-6596/924/i=1/a=012012?key=crossref.cb755fa895fbbc31ebe7ea870171fbe0

  • Molecular floating-gate single-electron transistor Reviewed

    Makoto Yamamoto, Yasuo Azuma, Masanori Sakamoto, Toshiharu Teranishi, Hisao Ishii, Yutaka Majima, Yutaka Noguchi

    SCIENTIFIC REPORTS   7   1589   2017.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41598-017-01578-7

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  • Degradation Process in Pentacene-Based Organic Field-Effect Transistors Evaluated by Three-Terminal Capacitance-Voltage Measurements Reviewed

    Yuya Tanaka, Kohei Yamamoto, Yutaka Noguchi, Hisao Ishii

    MRS Advances   2 ( 23 )   1267 - 1272   2017

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Materials Research Society  

    DOI： 10.1557/adv.2017.225

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  • Simulation of OLEDs with a polar electron transport layer Reviewed

    S. Altazin, S. Zufle, E. Knapp, C. Kirsch, T. D. Schmidt, L. Jaeger, Y. Noguchi, W. Bruetting, B. Ruhstaller

    ORGANIC ELECTRONICS   39   244 - 249   2016.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2016.10.014

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  • Fundamentals of displacement current measurement and analysis of operation mechanisms of organic light-emitting devices Invited

    Yutaka Noguchi, Hisao Ishii

    IEICE Technical Report   116 ( 281 )   21 - 24   2016.10

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

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  • Observation of charge transport through CdSe/ZnS quantum dots in a single-electron transistor structure Reviewed

    Masanori Kobo, Makoto Yamamoto, Hisao Ishii, Yutaka Noguchi

    JOURNAL OF APPLIED PHYSICS   120 ( 16 )   164306-1 - 164306-6   2016.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4966175

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  • 変位電流測定による有機EL素子の動作特性解析 Invited

    野口 裕, 石井久夫

    応用物理学会 有機分子・バイオエレクトロニクス分科会 会誌   27 ( 2 )   112 - 115   2016.5

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  • Observation of ambipolar switching in a silver nanoparticle single-electron transistor with multiple molecular floating gates Reviewed

    Makoto Yamamoto, Shuhei Shinohara, Kaoru Tamada, Hisao Ishii, Yutaka Noguchi

    JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 3 )   03DC02-1 - 03DC02-6   2016.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/JJAP.55.03DC02

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  • Significant relaxation of residual negative carrier in polar Alq(3) film directly detected by high-sensitivity photoemission Reviewed

    Hiroumi Kinjo, Hyunsoo Lim, Tomoya Sato, Yutaka Noguchi, Yasuo Nakayama, Hisao Ishii

    APPLIED PHYSICS EXPRESS   9 ( 2 )   021601-1 - 021601-4   2016.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/APEX.9.021601

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  • Analyzing degradation effects of organic light-emitting diodes via transient optical and electrical measurements Reviewed

    Tobias D. Schmidt, Lars Jaeger, Yutaka Noguchi, Hisao Ishii, Wolfgang Bruetting

    JOURNAL OF APPLIED PHYSICS   117 ( 21 )   215502   2015.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4921829

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  • Effects of Interface Electronic Structures on Transition Voltage Spectroscopy of Alkanethiol Molecular Junctions Reviewed

    Daisuke Nose, Kouki Dote, Tomoya Sato, Makoto Yamamoto, Hisao Ishii, Yutaka Noguchi

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 22 )   12765 - 12771   2015.6

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  • Charge carrier dynamics and degradation phenomena in organic light-emitting diodes doped by a thermally activated delayed fluorescence emitter Reviewed

    Yutaka Noguchi, Hyung-Jun Kim, Ryuta Ishino, Kenichi Goushi, Chihaya Adachi, Yasuo Nakayama, Hisao Ishii

    ORGANIC ELECTRONICS   17   184 - 191   2015.2

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  • Energetic Relaxation of Anions in OLED Films Directly Observed by High Sensitivity Photoemission: Impact of Orientation Polarization on Electron Injection Reviewed

    Hiroumi Kinjo, Tomoya Sato, Hyunsoo Lim, Hyung-Jun Kim, Junki Yamazaki, Koki Dote, Yutaka Noguchi, Yasuo Nakayama, Hisao Ishii

    Light， Energy and the Environment 2015   DM3D.2   2015

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  • Spontaneous orientation polarization of polar molecules and interface properties of organic electronic devices Invited Reviewed

    Yutaka Noguchi, Yasuo Nakayama, Hisao Ishii

    Journal of the Vacuum Society of Japan   58 ( 3 )   109 - 116   2015

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    DOI： 10.3131/jvsj2.58.109

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  • Evaluation of internal potential distribution and carrier extraction properties of organic solar cells through Kelvin probe and time-of-flight measurements Reviewed

    Yuya Tanaka, Yutaka Noguchi, Keisuke Oda, Yasuo Nakayama, Jun-ichi Takahashi, Hiroshi Tokairin, Hisao Ishii

    JOURNAL OF APPLIED PHYSICS   116 ( 11 )   114503-1 - 114503-7   2014.9

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    DOI： 10.1063/1.4895712

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  • Complete Demonstration of the Valence Electronic Structure Inside a Practical Organic Solar Cell Probed by Low Energy Photoemission Reviewed

    Yasuo Nakayama, Thanh Luan Nguyen, Yusuke Ozawa, Shin'ichi Machida, Tomoya Sato, Hiroshi Tokairin, Yutaka Noguchi, Hisao Ishii

    ADVANCED ENERGY MATERIALS   4 ( 7 )   1301354-1 - 1301354-9   2014.5

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    DOI： 10.1002/aenm.201301354

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  • Wavelength dependence and multiple-induced states in photoresponses of copper phthalocyanine-doped gold nanoparticle single-electron device Reviewed

    Makoto Yamamoto, Rieko Ueda, Toshifumi Terui, Keisuke Imazu, Kaoru Tamada, Takeshi Sakano, Kenji Matsuda, Hisao Ishii, Yutaka Noguchi

    JAPANESE JOURNAL OF APPLIED PHYSICS   53 ( 1 )   01AC02-1 - 01AC02-4   2014.1

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    DOI： 10.7567/JJAP.53.01AC02

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  • Photoresponses in Gold Nanoparticle Single-Electron Transistors with Molecular Floating Gates Reviewed

    Yutaka Noguchi, Makoto Yamamoto, Hisao Ishii, Rieko Ueda, Toshifumi Terui, Keisuke Imazu, Kaoru Tamada, Takeshi Sakano, Kenji Matsuda

    JAPANESE JOURNAL OF APPLIED PHYSICS   52 ( 11 )   110102-1 - 110102-7   2013.11

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  • Three-terminal capacitance-voltage measurements of pentacene field-effect transistors during operation Reviewed

    Yuya Tanaka, Yutaka Noguchi, Michael Kraus, Wolfgang Bruetting, Hisao Ishii

    ORGANIC ELECTRONICS   14 ( 10 )   2491 - 2496   2013.10

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    DOI： 10.1016/j.orgel.2013.06.013

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  • Influence of the direction of spontaneous orientation polarization on the charge injection properties of organic light-emitting diodes Reviewed

    Yutaka Noguchi, Hyunsoo Lim, Takashi Isoshima, Eisuke Ito, Masahiko Hara, Whee Won Chin, Jin Wook Han, Hiroumi Kinjo, Yusuke Ozawa, Yasuo Nakayama, Hisao Ishii

    Applied Physics Letters   102 ( 20 )   203306-1 - 203306-5   2013.5

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    DOI： 10.1063/1.4807797

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  • Displacement Current Measurement for Exploring Charge Carrier Dynamics in Organic Semiconductor Devices

    Yutaka Noguchi, Yuya Tanaka, Yukimasa Miyazaki, Naoki Sato, Yasuo Nakayama, Hisao Ishii

    Physics of Organic Semiconductors: Second Edition   119 - 154   2013.1

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  • 汎用的な材料の電子構造評価手法としての光電子収量分光法

    中山泰生, 佐藤友哉, 金城拓海, 宮内拓也, 江澤拓, 大澤佑介, 山下剛, 町田真一, 野口裕, コスワッタゲ ラシカ, 石井久夫

    信学技報   OME2012-103   55 - 60   2013

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  • Development of Single-Molecule and Nanoparticle Electronics Devices Invited Reviewed

    52 ( 1 )   43 - 50   2013

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    DOI： 10.11370/isj.52.43

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  • Electronic structures at organic heterojunctions of N,N '-bis(1-naphthyl)-N, N '-diphenyl-1,1 '-biphenyl-4,4 '-diamin (NPB)-based organic light emitting diodes Reviewed

    Yasuo Nakayama, Shin'ichi Machida, Yukimasa Miyazaki, Tatsuhiko Nishi, Yutaka Noguchi, Hisao Ishii

    ORGANIC ELECTRONICS   13 ( 12 )   2850 - 2855   2012.12

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    DOI： 10.1016/j.orgel.2012.08.033

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  • Time-Ol-Flight Measurement as a Tool to Investigate the Hole Blocking Nature of an Operating Organic Light-Emitting Diode

    Md. Mijanur Rahman, Naoki Ogawa, Yasuo Nakayama, Yutaka Noguchi, Hisao Ishii

    IEEE/OSA/IAPR International Conference on Informatics， Electronics & Vision   978-1-4673-1153-3   342 - 346   2012.10

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  • Time-of-flight technique to examine carrier blocking nature in organic light emitting diode Reviewed

    Md. Mijanur Rahman, Naoki Ogawa, Yukimasa Miyazaki, Yasuo Nakayama, Yutaka Noguchi, Hisao Ishii

    e-Journal of Surface Science and Nanotechnology   10   315 - 320   2012.7

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    DOI： 10.1380/ejssnt.2012.315

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  • Photoinduced conductance switching in a dye-doped gold nanoparticle transistor Reviewed

    Makoto Yamamoto, Toshifumi Terui, Rieko Ueda, Keisuke Imazu, Kaoru Tamada, Takeshi Sakano, Kenji Matsuda, Hisao Ishii, Yutaka Noguchi

    APPLIED PHYSICS LETTERS   101 ( 2 )   023103-1 - 023103-4   2012.7

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  • Erratum: Direct observation of the electronic states of single crystalline rubrene under ambient condition by photoelectron yield spectroscopy (Applied Physics Letters (2008) 93 (173305))

    Yasuo Nakayama, Shinichi MacHida, Takeo Minari, Kazuhito Tsukagoshi, Yutaka Noguchi, Hisao Ishii

    Applied Physics Letters   100 ( 26 )   269901 - 269901   2012.6

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    DOI： 10.1063/1.4729938

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  • Charge accumulation at organic semiconductor interfaces due to a permanent dipole moment and its orientational order in bilayer devices Reviewed

    Yutaka Noguchi, Yukimasa Miyazaki, Yuya Tanaka, Naoki Sato, Yasuo Nakayama, Tobias D. Schmidt, Wolfgang Bruetting, Hisao Ishii

    JOURNAL OF APPLIED PHYSICS   111 ( 11 )   114508-1 - 114508-10   2012.6

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    DOI： 10.1063/1.4724349

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  • Performance of Alq3-based Organic Light-Emitting Diode Fabricated under Light Irradiation Reviewed

    Hyung Jun Kim, Takamitsu Tamura, Yasuo Nakayama, Yutaka Noguchi, Hisao Ishii

    Journal of Photopolymer Science and Technology   25 ( 2 )   183 - 187   2012

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    DOI： 10.2494/photopolymer.25.183

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  • Device properties of Alq(3)-based organic light-emitting diodes studied by displacement current measurement Invited Reviewed

    Yutaka Noguchi, Takamitsu Tamura, Hyung Jun Kim, Hisao Ishii

    JOURNAL OF PHOTONICS FOR ENERGY   2   021214-1 - 021214-13   2012

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  • Displacement current measurement of a pentacene metal-insulator-semiconductor device to investigate both quasi-static and dynamic carrier behavior using a combined waveform Reviewed

    Yuya Tanaka, Yutaka Noguchi, Michael Kraus, Wolfgang Bruetting, Hisao Ishii

    ORGANIC ELECTRONICS   12 ( 9 )   1560 - 1565   2011.9

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    DOI： 10.1016/j.orgel.2011.06.002

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  • Charge transport in various dimensions of small networks composed of gold nanoparticles and terthiophene wire-molecules Reviewed

    Yutaka Noguchi, Toshifumi Terui, Takuya Katayama, Michio M. Matsushita, Tadashi Sugawara

    APPLIED PHYSICS LETTERS   98 ( 26 )   263114-1 - 263114-3   2011.6

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    DOI： 10.1063/1.3605598

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  • Displacement current measurement of MIS devices with ionic liquids to explore carrier behaviors in model interfaces of organic devices Reviewed

    Taiki Yamada, Yutaka Noguchi, Yukio Ouchi, Hisao Ishii

    Materials Research Society Symposium Proceedings   1286   43 - 48   2011

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    DOI： 10.1557/opl.2011.10

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  • Impedance spectroscopy for pentacene field-effect transistor -channel formation process in transistor operation Reviewed

    Yuya Tanaka, Yutaka Noguchi, Michael Kraus, Wolfgang Bruetting, Hisao Ishii

    ORGANIC FIELD-EFFECT TRANSISTORS X   8117   8117   2011

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    DOI： 10.1117/12.893685

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  • Capacitance-voltage measurement of an ambipolar pentacene field effect transistor in operation by using displacement current measurement Reviewed

    Yuya Tanaka, Yutaka Noguchi, Hisao Ishii

    Materials Research Society Symposium Proceedings   1287   45 - 50   2011

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    DOI： 10.1557/opl.2011.1433

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  • Characterization of the Interactions between Alq(3) Thin Films and Al Probed by Two-Color Sum-Frequency Generation Spectroscopy Reviewed

    Miyamae, Takayuki, Ito, Eisuke, Noguchi, Yutaka, Ishii, Hisao

    Journal of Physical Chemistry C   115 ( 19 )   9551 - 9560   2011

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    DOI： 10.1021/jp201051h

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  • Superperiodic conductance in a molecularly wired double-dot system self-assembled in a nanogap electrode Reviewed

    Yutaka Noguchi, Toshifumi Terui, Takuya Katayama, Michio M. Matsushita, Tadashi Sugawara

    JOURNAL OF APPLIED PHYSICS   108 ( 9 )   094313-1 - 094313-5   2010.11

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    DOI： 10.1063/1.3494110

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  • Interface electronic structures of 2-amino-4,5-imidazoledicarbonitrile on Ag and Al surfaces Reviewed

    Yasuo Nakayama, Yen-Hao Huang, Ching-Hsuan Wei, Takuya Kubo, Shin-ichi Machida, Tun-Wen Pi, S. -J. Tang, Yutaka Noguchi, Hisao Ishii

    JOURNAL OF APPLIED PHYSICS   108 ( 5 )   053702-1 - 053702-6   2010.9

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  • Origins of Improved Hole-Injection Efficiency by the Deposition of MoO3 on the Polymeric Semiconductor Poly(dioctylfluorene-alt-benzothiadiazole) (vol 19, pg 3746, 2009) Reviewed

    Nakayama Yasuo, Morii Katsuyuki, Suzuki Yuuichirou, Machida Hiroyuki, Kera Satoshi, Ueno Nobuo, Kitagawa Hiroshi, Noguchi Yutaka, Ishii Hisao

    ADVANCED FUNCTIONAL MATERIALS   20 ( 7 )   1036 - 1036   2010.4

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  • Light- and ion-gauge-induced space charges in tris-(8-hydroxyquinolate) aluminum-based organic light-emitting diodes Reviewed

    Yutaka Noguchi, Naoki Sato, Yukimasa Miyazaki, Hisao Ishii

    APPLIED PHYSICS LETTERS   96 ( 14 )   143305-1 - 143305-3   2010.4

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    DOI： 10.1063/1.3374405

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  • A photoresponsive single electron transistor prepared from oligothiophene molecules and gold nanoparticles in a nanogap electrode Reviewed

    Hidehiro Yamaguchi, Toshifumi Terui, Yutaka Noguchi, Rieko Ueda, Keiro Nasu, Akira Otomo, Kenji Matsuda

    APPLIED PHYSICS LETTERS   96 ( 10 )   103117-1 - 103117-3   2010.3

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  • トランジスタ型分子接合の作製とその電気伝導特性 Invited Reviewed

    応用物理   79 ( 11 )   1014 - 1018   2010

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  • Photoemission Study on the Electronic Structures of 2-amino-4,5-imidazoledicarbonitrile (AIDCN)-metal Interfaces as a Model of an Organic Nonvolatile Memory Device Reviewed

    NAKAYAMA Yasuo, HUANG Yen-Hao, WEI Chin-Hsuan, MACHIDA Shin-ichi, KUBO Takuya, PI Tun-Wen, TANG Shu-Jung, NOGUCHI Yutaka, ISHII Hisao

    J. Surf. Sci. Soc. Jpn.   31 ( 9 )   434 - 440   2010

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    2-amino-4,5-imidazoledicarbonitrile (AIDCN) is known as a promising material for organic nonvolatile memory application, and it has been reported that the performance of the AIDCN-based devices strongly depends on electrode metals. In the present study, we carried out photoemission spectroscopy (PES) measurements on the organic-on-metals (Ag and Al) and metals-on-organic model interfaces of an AIDCN-based memory device. The AIDCN overlayers on the Ag surface formed a sharp interface without apparent chemical interaction, while clear signs of a chemical reaction between the metal and AIDCN and formation of Al clusters in the AIDCN overlayers were revealed on the Al surface. Tendencies of the vacuum level shift and the highest occupied molecular orbital (HOMO) positions depending on the AIDCN coverage looked similar irrespective of the substrates. In the case of the metals-on-organic interfaces, in contrast, the shifting tendencies were opposite depending on the top-electrodes;the Ag-on-AIDCN interface showed upward band-bending with increasing the metal thickness, whereas downward bend-bending was observed for the Al-on-AIDCN interface. A possible origin of the band-bending is explained as intercalation of Ag or Al that behaves as acceptor- or donor-centers, respectively, into the AIDCN film.

    DOI： 10.1380/jsssj.31.434

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  • Higher Resistance to Hole Injection and Electric Field Distribution in Organic Light-Emitting Diodes with Copper Phthalocyanine Interlayer Reviewed

    Yutaka Noguchi, Naoki Sato, Yukimasa Miyazaki, Yasuo Nakayama, Hisao Ishii

    JAPANESE JOURNAL OF APPLIED PHYSICS   49 ( 1 )   01AA01-1 - 01AA01-5   2010

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  • Light Effective Mass in the Widely-Dispersed Valence Band of Single Crystalline Rubrene Observed by High-Resolution Angle-Resolved Ultraviolet Photoelectron Spectroscopy Reviewed

    Yasuo Nakayama, Shin-ichi Machida, Steffen Duhm, Qian Xin, Akihiro Funakoshi, Naoki Ogawa, Satoshi Kera, Nobuo Ueno, Yutaka Noguchi, and Hisao Ishii

    Proceedings of Material Research Society 2009 Fall Meeting   1197   D07-31-1 - D07-31-6   2010

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  • Origins of Improved Hole-injection Efficiency by the Deposition of MoO3 on the Polymeric Semiconductor Poly (dioctylfluorene-alt-benzothiadiazole) Reviewed

    Yasuo Nakayama, Katsuyuki Morii, Yuuichirou Suzuki, Hiroyuki Machida, Satoshi Kera, Nobuo Ueno, Hiroshi Kitagawa, Yutaka Noguchi, Hisao Ishii

    ADVANCED FUNCTIONAL MATERIALS   19 ( 23 )   3746 - 3752   2009.12

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    DOI： 10.1002/adfm.200901022

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  • Photoemission Studies on a Neutral Radical Molecular Crystal of a Tetrathiafulvalene-Based Nitronyl Nitroxide

    Yasuo Nakayama, Shin-ichi Machida, Yutaka Noguchi, Hisao Ishii, Hideji Komatsu, Michio M. Matsushita, Tadashi Sugawara

    UVSOR Activity Report   2009年版   141   2009

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  • Direct observation of the electronic states of single crystalline rubrene under ambient condition by photoelectron yield spectroscopy Reviewed

    Yasuo Nakayama, Shinichi Machida, Takeo Minari, Kazuhito Tsukagishi, Yutaka Noguchi, Hisao Ishii

    APPLIED PHYSICS LETTERS   93 ( 17 )   173305-1 - 173305-3   2008.10

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    DOI： 10.1063/1.2998650

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  • Threshold voltage shift and formation of charge traps induced by light irradiation during the fabrication of organic light-emitting diodes Reviewed

    Yutaka Noguchi, Naoki Sato, Yuya Tanaka, Yasuo Nakayama, Hisao Ishii

    APPLIED PHYSICS LETTERS   92 ( 20 )   203306-1 - 203306-3   2008.5

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    DOI： 10.1063/1.2936084

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  • Photoemission measurement of extremely insulating materials: Capacitive photocurrent detection in photoelectron yield spectroscopy Reviewed

    Yasuo Nakayama, Shinichi Machida, Daisuke Tsunami, Yasuo Kimura, Michio Niwano, Yutaka Noguchi, Hisao Ishii

    APPLIED PHYSICS LETTERS   92 ( 15 )   153306-1 - 153306-3   2008.4

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    DOI： 10.1063/1.2908888

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  • Organic Mott insulator-based nanowire fonned by using the Nano scale-electrocrystallization Reviewed

    Hiroyuki Hasegawa, Yutaka Noguchi, Rieko Ueda, Tohru Kubota, Shinro Mashiko

    THIN SOLID FILMS   516 ( 9 )   2491 - 2494   2008.3

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    DOI： 10.1016/j.tsf2007.04.057

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  • Observation of negative differential resistance and single-electron tunneling in electromigrated break junctions Reviewed

    Yutaka Noguchi, Rieko Ueda, Tohru Kubota, Toshiya Kamikado, Shiyoshi Yokoyama, Takashi Nagase

    THIN SOLID FILMS   516 ( 9 )   2762 - 2766   2008.3

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  • Does giant surface potential modify the performance of Alq(3)-based OLED? Voltage shift and charge traps induced by light irradiation Reviewed

    Yutaka Noguchi, Naoki Sato, Yuya Tanaka, Yasuo Nakayama, Hisao Ishii

    ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XII   7051   70510K-1 - 70510K-8   2008

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    DOI： 10.1117/12.795640

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  • Mechanism of hole accumulation at alpha-NPD/Alq(3) interface studied by displacement current measurement Reviewed

    Naoki Sato, Yutaka Noguchi, Yuya Tanaka, Yasuo Nakayama, Hisao Ishii

    ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XII   7051   70511S-1 - 70511S-7   2008

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    DOI： 10.1117/12.795790

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  • Displacement current measurement for organic light-emitting diodes comprising Alq_3 ; Hole accumulation properties at the hetero interface and the effects of light irradiation during device fabrication

    NOGUCHI Yutaka, SATO Naoki, TANAKA Yuya, NAKAYAMA Yasuo, ISHII Hisao

    IEICE technical report   108 ( 59 )   55 - 59   2008

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    We examined the mechanism of charge accumulation in organic light-emitting diodes comprising tris-(8-hydroxyquinolate) aluminum (Alq_3) using a displacement current measurement. Depending on the applied biasing voltage, two kinds of accumulation behavior were observed. At the biases lower than the built-in voltage (V_<bi>), the amount of hole accumulated at 4,4'-bis[N-(1-naphthyl)-N-phenylamino]-biphenyl/Alq_3 is dominated by the negative charge at the interface, but at the biases higher than V_<bi>, it is determined by the conductivity of each layer. In addition, we found that light irradiation during the device fabrication significantly reduces the amount of hole accumulated at the interface, suggesting that the orientation polarization in Alq_3 film is responsible for the charge accumulation properties.

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  • Fowler-Nordheim tunneling in electromigrated break junctions with porphyrin molecules Reviewed

    Yutaka Noguchi, Takashi Nagase, Rieko Ueda, Toshiya Kamikado, Tohru Kubota, Shinro Mashiko

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS   46 ( 4B )   2683 - 2686   2007.4

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    DOI： 10.1143/JJAP.46.2683

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  • ナノギャップ電極を用いた有機単一電子トランジスタの作製とその電気伝導特性 Invited Reviewed

    Telecom- Frontier   54   16 - 23   2007

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  • Fabrication of Au-molecule-Au junctions using electromigration method Reviewed

    Y Noguchi, T Nagase, T Kubota, T Kamikado, S Mashiko

    THIN SOLID FILMS   499 ( 1-2 )   90 - 94   2006.3

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    DOI： 10.1016/j.tsf.2005.06.078

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  • 有機単一電子トランジスタの作製

    野口 裕, 久保田 徹, 上田 里永子, 上門 敏也, 益子 信郎

    電子情報通信学会技術研究報告 信学技報   106   27 - 31   2006

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  • ナノギャップ電極を用いた単一分子トランジスタの作製とその電気伝導特性 Invited Reviewed

    野口 裕, 久保田 徹, 横山 士吉

    関西大学先 端科学技術推進機構「技苑」   ( 123 )   9 - 14   2006

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  • Nano-interfacial space charge and single electron tunneling conduction in metal/polyimide/metal junctions Reviewed

    Yutaka Noguchi, Takaaki Manaka, Mitsumasa Iwamoto

    Colloids and Surfaces A: Physicochemical and Engineering Aspects   257-258 ( 345 )   345 - 349   2005.5

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    DOI： 10.1016/j.colsurfa.2004.10.020

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  • Contribution of the metal/SiO2 interface potential to photoinduced switching in molecular single-electron tunneling junctions Reviewed

    Y Noguchi, T Kubota, S Mashiko, Y Wakayama

    JOURNAL OF APPLIED PHYSICS   97 ( 7 )   073513   2005.4

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    DOI： 10.1063/1.1862319

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  • Polyimide as a tunneling barrier in single-electron tunneling junctions Reviewed

    Yutaka Noguchi, Takaaki Manaka, Mitsumasa Iwamoto

    Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Vol 3   439 - 452   2005

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  • 積層型有機単一電子トンネル接合の電気伝導における界面空間電荷の影響 Invited Reviewed

    野口 裕, 間中 孝彰, 岩本 光正

    応用物理学会 有機分子・バイオエレクトロニクス分科会会誌   16   234 - 239   2005

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  • 有機単一電子トンネル接合の電流-電圧特性における光照射効果

    野口 裕, 久保田 徹, 益子 信郎, 若山 裕, 間中 孝彰, 岩本 光正

    電子情報通信学会技術研 究報告 信学技報   104   29 - 33   2004

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  • Photoinduced Gate Modulation and Temperature Dependence in the Coulomb Staircase of Organic Single Electron Tunneling Junctions Reviewed

    Yutaka Noguchi, Takaaki Manaka, Mitsumasa Iwamoto

    Jpn. J. Appl. Phys.   43 ( 4 )   2357 - 2361   2004

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：INSTITUTE OF PURE AND APPLIED PHYSICS  

    Threshold voltage shift in the Coulomb staircase induced by photoirradiation, that is, photoinduced gate modulation, was observed at a temperature of 15 K. The samples denoted by Au/PI/CuttbPc/PI/Al consisted of Kapton-type polyimide (PI) spin-coated films with copper tetra-t-butyl phthalocyanine (CuttbPc), sandwiched between Au and Al electrodes. The temperature dependence of the Coulomb staircase was also examined within the range of 15 K to 300 K. The single electron tunneling process was dominant below 150 K, whereas a thermally assisted electron conduction mechanism such as the hopping mechanism was dominant above 150 K. It was found that the photoinduced gate modulation and the temperature dependence observed in the Coulomb staircase of our junctions could be well explained by taking into account the space charge behavior at the metal/organic ultra-thin film interface.

    DOI： 10.1143/JJAP.43.2357

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  • STM observation of Coulomb staircase behavior through C60 clusters Reviewed

    Y Noguchi, Y Suzue, M Iwamoto

    CURRENT APPLIED PHYSICS   3 ( 5 )   397 - 399   2003.10

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    DOI： 10.1016/S1567-1739(03)00098-1

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  • Single-electron transport in metal/polyimide:C60/metal junction Reviewed

    Yutaka Noguchi, Takaaki Manaka, Mitsumasa Iwamoto

    Thin Solid Films   438-439   369 - 373   2003.8

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    DOI： 10.1016/S0040-6090(03)00770-3

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  • Interfacial electrostatic phenomena in polyimide Langmuir-Blodgett films in electron tunneling devices Reviewed

    M Iwamoto, T Manaka, Y Noguchi

    CURRENT APPLIED PHYSICS   3 ( 2-3 )   223 - 226   2003.4

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    DOI： 10.1016/S1567-1739(02)00206-7

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  • Single electron tunneling organic devices Reviewed

    Tohru Kubota, Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko, Yutaka Noguchi, Mitsumasa Iwamoto

    Nanotechnology and Nano-Interface Controlled Electronic Devices   31 - 39   2003

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    Language：English   Publishing type：Part of collection (book)   Publisher：Elsevier B.V.  

    DOI： 10.1016/B978-044451091-4/50004-2

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  • Step voltage in metal/polyimide/organic molecule/polyimide/metal junction Reviewed

    M Iwamoto, Y Noguchi, T Kubota, S Mashiko

    CURRENT APPLIED PHYSICS   2 ( 4 )   279 - 283   2002.8

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    DOI： 10.1016/S1567-1739(02)00109-8

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  • Space charge effect and the step voltages in metal/polyimide/rhodamine-dendorimer/polyimide/metal junctions (vol 90, pg 1368, 2001) Reviewed

    Y Noguchi, M Iwamoto, T Kubota, S Mashiko

    JOURNAL OF APPLIED PHYSICS   92 ( 2 )   1174 - 1176   2002.7

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    DOI： 10.1063/1.1487896

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  • Effect of interfacial space charges and coupling electrodes on organic single electron tunneling device Reviewed

    Y Noguchi, M Iwamoto, T Kubota, S Mashiko

    IEICE TRANSACTIONS ON ELECTRONICS   E85C ( 6 )   1247 - 1252   2002.6

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  • Analysis of step voltages in single electron tunneling devices using organic thin films Reviewed

    Yutaka Noguchi, Mitsumasa Iwamoto, Tohru Kubota, Shinro Mashiko

    Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   41 ( 4 B )   2749 - 2752   2002.4

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    DOI： 10.1143/JJAP.41.2749

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  • Effect of the metal/organic interface phenomena on the current-voltage characteristics of organic single electron tunneling device Reviewed

    Tohru Kubota, Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko, Yutaka Noguchi, Yutaka Majima, Mitsumasa Iwamoto

    Thin Solid Films   393 ( 1-2 )   379 - 382   2001.8

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    DOI： 10.1016/S0040-6090(01)01123-3

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  • Analysis of potential distribution and current-voltage characteristic in polyimide Langmuir-Blodgett films Reviewed

    CQ Li, Y Noguchi, HC Wu, M Iwamoto

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS   40 ( 7 )   4575 - 4580   2001.7

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    DOI： 10.1143/JJAP.40.4575

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  • Analysis of Space Charge Effect on the Current-Voltage Characteristic with a Step Structure in metal/polyimide/rhodamine- dendrimer/polyimide/metal junction Reviewed

    Yutaka Noguchi, Yutaka Majima, and Mitsumasa Iwamoto

    J. Appl. Phys.   90   1368 - 1375   2001

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    DOI： 10.1063/1.1380216

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  • Fabrication of molecular single electron tunneling device Reviewed

    Tohru Kubota, Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko, Yutaka Noguchi

    KIEE trans.   EA 12c-2   139 - 142   2001

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  • Current-voltage characteristics with a step structure of metal/polyimide/rhodamine-dendrimer/polyimide/metal junction Reviewed

    Y Noguchi, Y Majima, M Iwamoto, T Kubota, S Yokoyama, T Nakahama, S Mashiko

    IEICE TRANSACTIONS ON ELECTRONICS   E83C ( 7 )   1076 - 1080   2000.7

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Books

  • 変位電流評価法による有機発光素子の特性評価

    野口 裕（ Role： Sole author）

    シーエムシー出版  2024.3 

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  • Organic Semiconductors for Optoelectronics International journal

    Yutaka Noguchi, Hisao Ishii, Lars Jäger, Tobias D. Schmidt, Wolfgang Brütting（ Role： Joint authorChapter 11. Spontaneous Orientation Polarization in Organic Light-Emitting Diodes and its Influence on Charge Injection, Accumulation, and Degradation Properties）

    John Wiley & Sons Ltd.  2021.7 

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    Responsible for pages：273-293   Language：English   Book type：Scholarly book

    This chapter presents the relations between spontaneous orientation polarization (SOP) and the charge carrier dynamics as well as degradation properties in organic light-emitting diodes (OLEDs), particularly focusing on the interface properties. The interface charge model describes how SOP affects the charge injection and accumulation behavior. The polarization charge may enhance the carrier injection from the electrode. The chapter discusses these issues. It shows the electron injection property of bilayer devices incorporating a polar film at the cathode side. The chapter also shows degradation mechanisms of a phosphorescent OLED incorporating a polar film as an electron transport layer, studied by a combination of time resolved electroluminescence spectroscopy and displacement current measurement. Controling SOP based on the molecular design would be an important issue to improve device performance and exploit innovative functions of organic semiconductors.

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  • 電荷注入と界面物性

    （ Role： Sole author第２章）

    シーエムシー出版  2017.4  （ ISBN:9784781312408 ）

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  • 先端 有機半導体デバイスー基礎からデバイス物性までー

    野口 裕, 中山泰生, 石井久夫（ Role： Joint author6.2 電界分布と電荷蓄積）

    オーム社  2015.8  （ ISBN:9784274217784 ）

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  • Displacement current measurement for exploring charge carrier behav- iors in organic semiconductor devices

    Yutaka Noguchi, Yuya Tanaka, Yukimasa Miyazaki, Naoki Sato, Yasuo Nakayama, Hisao Ishii, Physics of Organic Semiconductors, Second Edition. Edited by W. Bruetting, C. Adachi, Chapter 5（ Role： Joint author）

    2012 

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    Responsible for pages：119-154   Language：English   Book type：Scholarly book

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  • ナノギャップ電極と単一分子の電気伝導特性

    永瀬 隆, 野口 裕, 蒲生 健次, 久保田 徹（ Role： Joint author）

    CMC 出版  2007 

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  • Polyimide as a Tunneling Barrier in Single-Electron Tunneling Junctions

    Yutaka Noguchi, Takaaki Manaka, and Mitsumasa Iwamoto（ Role： Joint author）

    VSP, Utrecht-Boston  2005 

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    Responsible for pages：439-452   Language：English   Book type：Scholarly book

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  • Single Electron Tunneling Organic Device

    Tohru Kubota, Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko, Yutaka Noguchi, and Mitsumasa Iwamoto（ Role： Joint author）

    2003 

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    Responsible for pages：31-40   Language：English   Book type：Scholarly book

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MISC

  • 【183】有機半導体材料の自 発的配向分極現象と 分子間相互作用の相関

    梶 弘典, 長田 航平, 合志 憲一, 安達 千波矢, 石井 久夫, 野口 裕

    第65回応用物理学会 春季学術講演会, ベルサール高田馬場（+早稲田大学西早稲田キャンパス）   2018.3

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  • 銀微粒子単電子トランジスタの作製

    山本真人, 大岩さゆり, 篠原修平, 玉田薫, 上田里永子, 照井通文, 石井久夫, 野口裕

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   61st   2014

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  • 銅フタロシアニン誘導体を添加した銀微粒子単電子トランジスタにおける光応答特性

    山本真人, 大岩さゆり, 篠原修平, 玉田薫, 上田里永子, 照井通文, 石井久夫, 野口裕

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   75th   2014

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  • 分子フローティングゲート単電子デバイスにおける光応答特性およびその波長依存性

    山本真人, 照井通文, 上田里永子, 今津圭介, 玉田薫, 坂野豪, 松田建児, 石井久夫, 石井久夫, 野口裕, 野口裕, 野口裕

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   60th   2013

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  • 色素分子をフローティングゲートにした光制御型単電子デバイスにおけるスイッチング特性

    山本真人, 照井通文, 上田里永子, 今津圭介, 玉田薫, 坂野剛, 松田建児, 石井久夫, 石井久夫, 野口裕, 野口裕, 野口裕

    応用物理学会学術講演会講演予稿集(CD-ROM)   73rd   2012

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  • 25aRL-9 Charge transport properties of double-dot system in single electron tunneling transistor with oligothiophene-gold nano particle hybrids

    Terui T., Noguchi Y., Katayama T., Matsushita M. M., Sugawara T.

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   820 - 820   2010.8

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  • 21pGS-1 Direct observation of the valence band dispersion of single-crystalline rubrene by angle-resolved photoemission

    Nakayama Yasuo, Machida Shin-ichi, Duhm Steffen, Xin Qian, Funakoshi Akihiro, Ogawa Naoki, Kera Satoshi, Ueno Nobuo, Noguchi Yutaka, Ishii Hisao

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   887 - 887   2010.3

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  • 27pYD-8 Characterization of SET of diarylethene-gold nano particle composite under photo irradiation

    Terui Toshifumi, Yamaguchi Hidehiro, Noguchi Yutaka, Ueda Rieko, Otomo Akira, Matsuda Kenji

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   779 - 779   2009.8

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  • 30aYG-4 Electronic structure of single-crystalline rubrene probed by photoelectron analysis

    Nakayama Yasuo, Machida Shinichi, Kubo Takuya, Funakoshi Akihiro, Ogawa Naoki, Minari Takeo, Tsukagoshi Kazuhito, Noguchi Yutaka, Ishii Hisao

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   856 - 856   2009.3

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  • 22aRC-9 Electron transport of oligothiophene derivatives and gold nano particles with the molecules in nanogyap fabricated by electro migration

    Terui T., Noguchi Y., Katayama T., Matsushita M., Ueda R., Sugawara T.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   868 - 868   2007.8

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  • Electric properites of oligothiophene molecules and gold nano particles covered with oligothiophene

    TERUI Toshifumi, NOGUCHI Yutaka, KATAYAMA Takuya, MATSUSHITA Michio M., SUGAWARA Tadashi

    IEICE technical report   107 ( 122 )   13 - 16   2007.6

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    We examined the fabrication of single-electorn transistors (SETs) with oligothiophene derivative or Au nano particle covered with oligothiophene as Coulomb island. The SET device was consisted of a nanogap electrode, a molecular Coulomb island, and back gate electrode. The nanogap electrode was fabricated by the electromigration method. We could obtain the SET characteristics from the electron transport properties of both devices at UK. Spectra that owing to a molecule was obtained in the electric transport properties of these devices at 11K. Moreover, we could obtain the SET characteristics in some devices.

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  • CS-9-2 Electrical properties of single molecules for molecular computing system

    Kubota Tohru, Noguchi Yutaka, Nagase Takashi, Peper Ferdinand, Ueda Rieko, Mashiko Shinro

    Proceedings of the IEICE General Conference   2007 ( 2 )   "S - 35"-"S-36"   2007.3

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  • Fabrication of Molecular SET Device for Single Electron Computing System

    KUBOTA Tohru, NOGUCHI Yutaka, FERDINAND Peper

    IEICE technical report   106 ( 252 )   17 - 22   2006.9

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    Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

    Single electron tunneling (SET) Device have attracted great interests due to their potential application in nano-electronics devices and information/communication devices. A typical configuration of this device is a small metal or semiconductor island, so-called Coulomb island. When we use the single molecules for Coulomb island of SET Device, it is easy and useful to make devices and to operate the device characteristics by photo-irradiation. Then, we try to make the single molecular SET device. We try to investigate the electrical and photonics properties of these devices. However, SET device do not have system architect affinity with CMOS architecture. In this report, we introduce the new Delay-Insensitive architecture and Charge-state Logic architecture with good affinity of SET device. And we try to make and study the organic SET device with SET Logic (wire) like molecule in the Island.

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  • Fowler-Nordheim Tunneling in Electromigrated Break Junctions with Porphyrin Derivatives

    NOGUCHI Yutaka, NAGASE Takashi, UEDA Rieko, KAMIKADO Toshiya, KUBOTA Tohru, MASHIKO Shinro

    2006   910 - 911   2006.9

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  • CS-9-7 Electrical Properties of Single and Assembled Molecular Wire Device

    Kubota Tohru, Wakayama Yutaka, Nagase Takashi, Noguchi Yutaka, ueda Rieko, Mashiko Shinro

    Proceedings of the Society Conference of IEICE   2006 ( 2 )   "S - 35"-"S-36"   2006.9

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  • Electrical properties of organic single molecules in ultra-narrow gold nano-gap electrodes(Evaluation of organic materials)

    Kubota Tohru, Nagase Takashi, Noguchi Yutaka, Ueda Rieko, Mashiko Shinro

    Technical report of IEICE. OME   106 ( 37 )   33 - 34   2006.5

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  • CS-10-7 Light Assisted Single Molecular Electronics Devices

    Kubota Tohru, Wakayama Yutaka, Nagase Takashi, Noguchi Yutaka, Mashiko Shinro

    Proceedings of the IEICE General Conference   2005 ( 2 )   "S - 47"-"S-48"   2005.3

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  • 有機分子・バイオエレクトロニクス分科会奨励賞受賞記念講演 積層型有機単一電子トンネル接合における光誘起ゲート効果

    野口裕, 間中孝彰, 岩本光正

    応用物理学会学術講演会講演予稿集   66th ( 3 )   2005

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  • 有機単電子トンネル素子における光誘起ゲート効果の金属/ポリイミド界面空間電荷による検討

    野口裕, 間中孝彰, 岩本光正

    応用物理学会学術講演会講演予稿集   64th ( 3 )   2003

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  • 有機超薄膜を用いた単電子トンネル素子における光誘起ゲート効果

    野口裕, 鈴江祐馬, 広田洋平, 間中孝彰, 岩本光正

    応用物理学関係連合講演会講演予稿集   50th ( 3 )   2003

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  • Light-Induced gate operation in single electron tunneling device using organic thin films

    Yutaka Noguchi, Yuma Suzue, Youhei Hirota, Takaaki Manaka, Mitsumasa Iwamoto

    Second International Confernce on Molecular Electronics and Bioelectronics (M&BE2)   97   2003

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  • Phtoinduced Gate Operation and Temperature Dependence in the Coulomb Staircase of Organic Single Electron Tunneling Junctions

    Yutaka Noguchi, Takaaki Manaka, Mitsumasa Iwamoto

    Extended Abstructs of the 2003 International Conference on Solid State Devices and Materials(Tokyo)   786 - 787   2003

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  • C60・ポリイミド混合膜を用いたMIM構造素子の電流ー電圧特性

    野口裕, 鈴江祐馬, 間中孝彰, 岩本光正

    第63回応用物理学会学術講演会9/24-27,2002,新潟大学   3   1108(26a-ZF-12)   2002

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  • Electrical properties of organic single electron tunneling device

    Tohru Kubota, Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko, Yutaka Noguchi, Kazuhito Hashizume, Takaaki Manaka, Mitsumasa Iwamoto

    Proceedings of the International Symposium on Electrical Insulating Materials   541 - 544   2001.12

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  • Analysis of Current-Voltage Characteristics of Single Electron Tunneling Device Using Rhodamine-dendrimer Molecule As a Center Electrode

    Noguchi Yutaka, Hashizume Kazuhito, Iwamoto Mitsumasa, Kubota Tohru, Mashiko Shinro

    Technical report of IEICE. OME   101 ( 103 )   37 - 42   2001.6

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    Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

    An organic single electron tunneling (SET) device is prepared by using a rhodamine-dendrimer (Rh-G2) molecule as small center electrode. The step structure, that is one of the important properties of SET, can be found in the Current-voltage (I-V) characteristics of the devices at a temperature below 35 K. Based on the theory of Coulomb blockade and assuming the rhodamine as metallic droplet, the capacitance formed between the metal and Rh-G2 was estimated from the I-V characteristics. The effect of space charges that exist at the metal/organic film interface on SET characteristic was also discussed.

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  • 有機単電子トンネル素子の電流電圧特性における界面空間電荷の影響

    野口裕, 真島豊, 岩本光正

    電気学会論文誌   121A   616 - 621   2001

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  • Electrical transport property of Metal/Polyimide/Rhodamine-dendorimer/Polyimide/Metal element

    NOGUCHI Yutaka, MAJIMA Yutaka, IWAMOTO Mitsumasa, KUBOTA Tohru, MASHIKO Shinro

    Technical report of IEICE. OME   99 ( 79 )   17 - 22   1999.5

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    We examined the I-V characteristic of metal/polyimide/rhodamine-dendorimer/ polyimide/metal element made by the LB technique. A step structure was observed in the I-V characteristic at a temperature of 29.8K, and this result was discussed based on a single electron tunneling process. To determine the energy diagram of the element, we also examined the dipole moment of rhodamine-dendorimer monolayer on a water surface, assuming a model that half of the rhodamine-dendorimer molecule is immersed in the water.

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Presentations

  • 非晶質有機半導体薄膜の自発配向分極と有機EL素子の駆動・劣化機構 Invited

    野口 裕

    第73回応用物理学会春季学術講演会  2026.3 

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    Event date： 2026.3

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Influences of spontaneous orientation polarization on device performance in organic light-emitting diodes Invited International conference

    Yutaka Noguchi

    The 17th Asian Conference on Organic Electronics (A-COE2025)  2025.11 

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    Event date： 2025.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Pukyong National University, Busan, Korea   Country/Region：Korea, Republic of  

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  • Controlling charge accumulation for improved performance in organic light-emitting diodes Invited International conference

    Yutaka Noguchi

    14th International Symposium on Organic Molecular Electronics (ISOME2025)  2025.11  IEICE Electronics Society

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    Event date： 2025.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：信州大学工学部、長野市   Country/Region：Japan  

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  • DCM-PL technique to investigate charge carrier and exciton dynamics in organic light-emitting diodes Invited International conference

    Yutaka Noguchi, Kotaro Kudo, Shotaro Nakano, Mihiro Takeda

    SPIE Optics + Photonics 2025  2025.8  SPIE

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    Event date： 2025.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego, California   Country/Region：United States  

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  • Controlling Spontaneous Orientation Polarization in Organic Light-Emitting Diodes and its Influences on Device Performance Invited International coauthorship International conference

    Yutaka Noguchi, Mihiro Takeda, Masaki Yono, Alexander Hofmann, Wolfgang Brütting

    19th International Conference on Organized Molecular Films  2025.7 

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    Event date： 2025.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Tokyo  

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  • Impact of Spontaneous Orientation Polarization on Device Performance of Organic Light-Emitting Diodes Invited International coauthorship International conference

    Yutaka Noguchi, Mihiro Takeda, Shotaro Nakano, Alexander Hofmann, Wolfgang, Brütting

    SID Display Week 2025  2025.5  The Society for Information Display

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    Event date： 2025.5

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Jose, California   Country/Region：United States  

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  • OLED Displays and Related Technologies Invited

    野口 裕

    IDW '24 チュートリアル  2024.12  SID日本支部

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    Event date： 2024.12

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：札幌   Country/Region：Japan  

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  • Impact of spontaneous orientation polarization on device performance of organic light-emitting diodes Invited

    Yutaka Noguchi

    Display Workshop '24  2024.12  Huawei Technologies Japan K.K.

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    Event date： 2024.12

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Osaka, Japan   Country/Region：Japan  

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  • 有機蒸着膜の自発的配向分極現象と有機EL素子特性 Invited International coauthorship

    野口 裕, 武田 実宙, 中野 正太郎, Alexander Hofmann, Wolfgang Brütting

    2024年度有機エレクトロニクスシンポジウム「有機ELディスプレイの超高性能化技術」  2024.10  高分子学会

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    Event date： 2024.10

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：オンライン  

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  • 有機EL素子の界面電荷蓄積と励起子消光特性評価 Invited

    野口 裕, 武田 実宙, 中野 正太郎

    令和6年電気学会 基礎・材料・共通部門大会  2024.9 

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：愛媛大学（城北キャンパス）  

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  • Correlations of interface charge accumulation and device characteristics studied by DCM-PL technique Invited International coauthorship International conference

    Yutaka Noguchi, Mihiro Takeda, Shotaro Nakano, Alexander Hofmann, Wolfgang Brütting

    SPIE Optics + Photonics 2024  2024.8 

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    Event date： 2024.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego, California   Country/Region：United States  

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  • Introduction to Device Physics of Organic Light-Emitting Diodes Invited

    Yutaka Noguchi

    URSTech & APSURS 2024  2024.7 

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    Event date： 2024.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Sabaragamuwa University of Sri Lanka   Country/Region：Sri Lanka  

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  • Charge accumulation and exciton quenching properties in polar and nonpolar emission layers of phosphorescent organic light-emitting diodes International conference

    Yutaka Noguchi, Shotaro Nakano

    26. International Conference on Science and Technology of Synthetic Electronic Materials (ICSM24)  2024.6 

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    Event date： 2024.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Dresden   Country/Region：Germany  

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  • 有機EL材料の自発的配向分極に関する先駆的研究 Invited

    野口 裕

    有機EL討論会第38回例会  2024.6  有機EL討論会

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    Event date： 2024.6

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：東京国際交流館プラザ平成   Country/Region：Japan  

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  • Controlling Charge Accumulation Properties at Organic Hetero Interfaces via Spontaneous Orientation Polarization Invited International coauthorship International conference

    Yutaka Noguchi, Mihiro Takeda, Alexander Hofmann, Wolfgang Brütting

    The 30th International Display Workshops (IDW'23)  2023.12 

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    Event date： 2023.12

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：朱鷺メッセ、新潟市  

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  • OLED Displays and Related Technologies Invited

    野口 裕

    IDW'23 チュートリアル  2023.12  SID日本支部

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    Event date： 2023.12

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：朱鷺メッセ、新潟市  

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  • Controlling charge accumulation properties at organic hetero-interfaces using dipolar doping of hole transport layers Invited International coauthorship International conference

    Yutaka Noguchi, Mihiro Takeda, Alexander Hofmann, Wolfgang Bruetting

    SPIE Optics + Photonics 2023  2023.8  SPIE

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    Event date： 2023.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego, California   Country/Region：United States  

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  • 有機半導体蒸着膜における自発的配向分極現象 Invited

    野口 裕

    第70回応用物理学会春季学術講演会  2023.3 

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    Event date： 2023.3

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：上智大学  

    自発的配向分極（SOP）は有機EL材料をはじめとした多くの非晶質有機蒸着膜において見られる一般的な現象である。有機EL素子のような積層型素子において、SOPはヘテロ界面に一定密度の分極電荷を誘起し、電荷注入・蓄積特性に影響を及ぼす。したがって、SOPの制御と最適化が素子性能の向上に向けた課題となる。本講演では、SOPの形成機構に関する現在の理解を概観し、有機EL素子特性との関連について最近の研究成果を中心に紹介する。

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  • DCM-PL法による電荷蓄積挙動と励起子消光特性の同時計測

    二宮 海斗, 佐藤 克哉, 野口 裕

    有機EL討論会第35回例会  2022.11  有機EL討論会

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    Event date： 2022.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：石川県金沢市   Country/Region：Japan  

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  • 変位電流とPL強度の同時測定による電荷蓄積挙動および励起子消光特性評価

    二宮 海斗, 佐藤 克哉, 野口 裕

    第83回応用物理学会秋季学術講演会  2022.9  応用物理学会

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東北大学 川内北キャンパス+オンライン   Country/Region：Japan  

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  • 双極子ドープ正孔輸送層による界面蓄積電荷特性の制御 International coauthorship

    野口 裕, Hofmann Alexander, Brütting Wolfgang

    第83回応用物理学会秋季学術講演会  2022.9  応用物理学会

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東北大学 川内北キャンパス+オンライン   Country/Region：Japan  

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  • Charge carrier dynamics and exciton-polaron quenching studied by simultaneous measurement of displacement current and photoluminescence Invited International conference

    Yutaka Noguchi, Kaito Ninomiya, Katsuya Sato

    International Conference on Simulation of Organic Electronics and Photovoltaics 2022 (SimOEP2022)  2022.9  FLUXiM AG

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    Event date： 2022.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Zurich University of Applied Sciences, Zurich, Switzerland (hybrid)   Country/Region：Switzerland  

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  • Simultaneous observation of charge accumulation and exciton quenching at organic hetero interfaces Invited International conference

    Yutaka Noguchi, Kaito Ninomiya, Katsuya Sato

    SPIE. Organic Photonics + Electronics  2022.8  SPIE.

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    Event date： 2022.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego Convention Center, San Diego, California, United States.   Country/Region：United States  

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  • Transition of dominant factors in luminous efficiency of light-emitting electrochemical cells International conference

    Yutaka Noguchi

    International Conference on Synthetic Metals 2022 (ICSM2022)  2022.7 

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    Event date： 2022.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：University of Glasgow  

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  • Recent progress in understanding spontaneous orientation polarization in organic light-emitting diodes Invited

    Yutaka Noguchi

    The 6th International TADF Workshop  2021.12 

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    Event date： 2021.12

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Online  

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  • 電気化学発光セルにおける発光効率支配要因の推移 Invited

    野口 裕, 岩切 勇人, 渡辺 穂高

    WPI-MANA Virtual City of Workshops, 有機エレクトロニクスワークショップ  2021.11  NIMS

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    Event date： 2021.11 - 2022.11

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：オンライン開催  

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  • 有機半導体の自発的配向分極と有機EL素子の動作特性 Invited

    野口 裕

    日本表面真空学会九州支部セミナー  2020.12  日本表面真空学会九州支部

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：WebEXオンライン会議室  

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  • Analysis of Dynamic Behaviors in Light-Emitting Electrochemical Cells Invited International conference

    Yutaka Noguchi, Hayato Iwakiri, Ryo Yonemoto, Tetsuya Higeta

    The Second International Conference of Polymeric and Organic Materials in Yamagata University (2nd IPOMY)  2019.12 

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    Venue：Yonezawa, Japan  

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  • 電気化学発光セルの動的動作特性解析 Invited

    野口 裕

    光電相互変換 第125委員会 第248回研究会  2019.12  日本学術振興会

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    Venue：明治大学グローバルフロント  

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  • Formation mechanism of spontaneous orientation polarization in evaporated films of organic light-emitting diode materials Invited International conference

    Yutaka Noguchi, Kohei Osada, Hisao Ishii

    International Display Workshops 2019 (IDW '19)  2019.11 

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    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Sapporo Convention Center, Sapporo, Japan  

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  • キャリア注入 Invited

    野口 裕

    有機エレクトロニクス講習会2019  2019.11  高分子学会

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    Venue：明治大学グローバルフロント、東京  

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  • Towards Understanding and Controlling Spontaneous Orientation Polarization in Organic Semiconducting Films Invited International conference

    Yutaka Noguchi, Kohei Osada, Hisao Ishii

    International Conference of Sabaragamuwa University of Sri Lanka 2019 (ICSUSL2019)  2019.11 

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    Venue：Sabaragamuwa University of Sri Lanka, Belihuroya, Sri Lanka  

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  • Giant surface potential of co-evaporated films of organic semiconductors International conference

    Yutaka Noguchi, Kohei Osada, Hisao Ishii

    15th European Conference on Molecular Electronics (ECME2019)  2019.8 

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  • Spontaneous orientation polarization in organic light-emitting diode materials Invited International conference

    Yutaka Noguchi, Kohei Osada, Hisao Ishii

    SPIE. Organic Photonics + Electronics  2019.8  SPIE

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    Venue：San Diego Convention Center, San Diego, California, United States  

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  • 変位電流評価法を用いた電気化学発光セルの動作機構解析 －電気化学ドーピングと電気・光学特性の相関－

    野口 裕, 日下田 哲也, 岩切 勇人

    有機EL討論会 第28回例会  2019.6 

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    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京国際交流館  

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  • 有機共蒸着膜における巨大表面電位

    長田 航平, 石井 久夫, 野口 裕

    第66回応用物理学会春季学術講演会  2019.3 

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    Venue：東京工業大学（東京）  

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  • Displacement current measurement for investigating operation mechanisms of light-emitting electrochemical cells

    Yutaka Noguchi

    International Workshop on Organic Semiconductors and Related Materials  2019.1 

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    Venue：Chiba University, Chiba, Japan.  

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  • Electrical and optical properties during doping relaxation process in light-emitting electrochemical cells studied by extended displacement current measurement International conference

    Yutaka Noguchi, Tetsuya Higeta, Fumihiro Yonekawa

    9th International Conference on Molecular Electronics (ElecMOL2018)  2018.12 

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    Venue：Paris, France  

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  • 変位電流測定による電気化学発光セルの動作機構解析 Invited

    野口 裕

    第374回蛍光体同学会講演会  2018.11  電気化学会蛍光体研究懇談会

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    Venue：明治大学駿河台キャンパス紫紺館  

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  • Simultaneous Observation of Transient Electrical and Luminous Characteristics in Light-emitting Electrochemical Cells International conference

    Yutaka Noguchi, Yuichiro Kato, Tetsuya Higeta, Fumihiro Yonekawa

    19th International Workshop on Inorganic and Organic Electroluminescence & 2018 International Conference on the Science and Technology of Emissive Displays and Lighting (EL2018)  2018.9 

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    Venue：Meiji University, Tokyo, Japan  

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  • 有機ELデバイスの動作機構解析 Invited

    野口 裕

    応用物理学会関西支部セミナー「光機能の新展開〜有機ELデバイスの新展開〜」  2018.1  応用物理学会関西支部

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：大阪私立大学  

    有機半導体素子の多くは積層構造を持ち、その結果生じる素子内の界面は機能発現の重要な場となる。我々は、金属／有機膜界面における電荷注入、有機／有機界面における電荷蓄積特性に着目し、変位電流評価法（DCM）を用いた有機半導体素子の動作機構解析を行ってきた。本講演では、DCMを有機発光素子の動作・劣化機構解析に適用した結果について述べる。特に，積層型有機EL素子において，有機蒸着膜の自発的配向分極に起因した分極電荷が引き起こす電荷注入・蓄積現象と劣化特性について述べる．また，DCMの応用例として，電解質と注入キャリアとの相互作用により複雑な動作特性を示す電気化学発光セルの動作機構解析結果についても紹介する。

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  • 有機・分子デバイス分野での18年 Invited

    野口 裕

    第8回有機分子・バイオエレクトロニクスの未来を拓く若手研究者討論会  2017.9  応用物理学会 有機分子・バイオエレクトロニクス分科会

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：佐賀県武雄市  

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  • 変位電流測定による有機発光素子の動作機構解析 Invited

    野口 裕, 石井 久夫

    学振第142委員会第76回研究会  2017.9  学振第142委員会、第125委員会

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    Venue：九州大学伊都キャンパス（福岡）  

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  • Single-molecules as a floating gate of metal nanoparticle single-electron transistor International conference

    Yutaka Noguchi, Makoto Yamamoto, Yasuo Azuma, Hisao Ishii, Yutaka Majima

    14th European Conference on Molecular Electronics (ECME2017)  2017.9 

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    Venue：Dresden, Germany  

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  • Transient properties of light-emitting electrochemical cells studied by displacement current measurement International conference

    Yutaka Noguchi, Tetsuya Higeta, Fumihiro Yonekawa

    9th International Conference on Molecular Electronics and Bioelectronics (M&BE9)  2017.6 

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    Venue：Kanazawa, Japan  

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  • Displacement current measurement for analyzing transient behaviors in light-emitting electrochemical cells Invited

    2017 KPS spring meeting  2017.4  Korea Physical Society

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    Venue：Daejeon, Korea  

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  • 変位電流と発光強度の同時測定による電気化学発光セルの過渡特性解析

    野口 裕, 日下田 哲也, 米川 文広

    第64応用物理学会学術講演会  2017.3 

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    Venue：パシフィコ横浜  

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  • 変位電流評価法を用いた電気化学発光セルの動作機構解析

    野口 裕, 日下田 哲也

    有機EL討論会第２３回例会  2016.11  有機EL討論会

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：富山市  

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  • 変位電流測定の基礎と有機発光素子の動作機構解析 Invited

    野口 裕, 石井 久夫

    有機エレクトロニクス研究会  2016.10  電子情報通信学会 有機エレクトロニクス研究会

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    Venue：機械振興会館（東京）  

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  • 有機EL素子における自発的配向分極と電荷注入、蓄積、劣化特性への影響 Invited

    野口 裕, 石井久夫

    有機エレクトロニクス研究会  2016.10  高分子学会

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    Venue：東京工業大学田町キャンパスCIC国際会議室  

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  • Asymmetric formation of p-i-n junction in a light-emitting electrochemical cell studied by displacement current measurement International conference

    Yutaka Noguchi, Tetsuya Higeta

    8th International Conference on Molecular Electronics (ElecMol2016)  2016.8 

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    Venue：Paris, France  

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  • 変位電流測定による有機EL素子の動作特性解析

    野口 裕, 石井 久夫

    M&BE研究会「未来を拓く有機分子・バイオエレクトロニクス」  2016.6  応用物理学会 有機分子・バイオエレクトロニクス分科会

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：山形県天童市  

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  • Operating mechanism of light-emitting electrochemical cells studied by displacement current measurement

    Yutaka Noguchi, Saki Sano

    The 63rd JSAP Spring Meeting, 2016  2016.3  The Japan Society of Applied Physics

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    Venue：Tokyo, Japan  

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  • 積層型有機薄膜素子における電荷注入・蓄積および劣化特性 Invited

    野口 裕

    ナノプローブテクノロジー第167委員会 第80回研究会  2015.10  日本学術振興会 第167委員会

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：宮城県仙台市  

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  • 有機蒸着膜の配向分極と有機EL素子の界面特性

    野口 裕, 石井久夫

    第64回高分子討論会  2015.9  公益社団法人高分子学会

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    Venue：宮城県仙台市  

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  • Contribution of interface electronic structures to transition voltage spectroscopy of alkanethiol molecular junctions International conference

    Yutaka Noguchi, Daisuke Nose, Koki Dote, Tomoya Sato, Makoto Yamamoto, Hisao Ishii

    ECME2015  2015.9 

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    Venue：Strasbourg, France  

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  • The Roles of Interface Charge in Organic Light-Emitting Diodes Doped by a Thermally Activated Delayed Fluorescence Emitter International conference

    Yutaka Noguchi, Hyung Jun Kim, Ryuta Ishino, Kenichi Goushi, Chihaya Adachi, Yasuo Nakayama, Hisao Ishii

    Eighth International Conference on Molecular Electronics and Bioelectronics (M&BE8)  2015.6 

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    Venue：Tower Hall Funabori, Japan  

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  • アルカンチオール分子接合のTransition voltage spectroscopyにおける界面準位および非対称性の寄与

    野勢大輔, 佐藤友哉, 土手宏樹, 石井久夫, 野口 裕

    第62回応用物理学会春季学術講演会  2015.3 

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    Venue：東海大学 湘南キャンパス  

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  • 有機蒸着膜の配向分極現象と有機 EL 素子の界面特性 Invited

    科学研究費補助金基盤研 究 S 公開シンポジウム  2014.12 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：東京工業大学, デジタル多目的ホール  

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  • Spontaneous Orientation Polarization of Organic Semiconductor Films and Charge Carrier Dynamics in Organic Multilayer Devices Invited International conference

    International Conference of Smart Systems Engineering 2014 (SmaSys2014)  2014.10 

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    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Yonezawa, Japan  

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  • Charge Carrier Behaviors and Degradation Phenomena in Organic Light-Emitting Diodes Doped by a Thermally Activated Delayed Fluorescence Emitter Invited International conference

    Yutaka Noguchi, Hyung Jun Kim, Ryuta Ishino, Kenichi Goushi, Chihaya Adachi, Yasuo Nakayama, Hisao Ishii

    The 14th International Discussion & Conference on Nano Interface Controlled Electronic Devices (IDC-NICE 2014)  2014.10 

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    Venue：Samcheonggak, Seoul, Korea (IB7)  

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  • Charge Carrier Dynamics in Organic Light-Emitting Diodes doped by a Thermally Activated Delayed Fluorescent Emitter International conference

    Yutaka Noguchi, Hyung Jun Kim, Ryuta Ishino, Yasuo Nakayama, Hisao Ishii

    7th International Conference on Molecular Electronics(ElecMol2014)  2014.8 

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    Venue：Strasbourg, France  

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  • 変位電流評価法による有機 EL 素子の電荷挙動解析 Invited

    CEREBA 有機 EL 実践技 術講座(第4回)  2014.2 

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    Venue：産総研 CEREBA  

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  • 色素ドープナノ粒子 SET の光誘起スイッチング特性 Invited

    野口 裕, 山本真人, 石井久夫, 上田里永子, 照井通文, 今津圭介, 玉田薫, 坂野豪, 松田建 児

    分子研研究会「光による分子性 伝導体の電子相制御」  2013.10 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：岡崎コンファレンスセンター  

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  • 有機薄膜の配向分極と界面電気特性評価 Invited

    野口 裕, 中山泰生, 石井 久夫

    第 74 回応用 物理学会秋季学術講演会  2013.9 

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  • Influence of the direction of spontaneous orientation polarization on the charge injection properties of organic light-emitting diodes International conference

    Yutaka Noguchi, Hyunsoo Lim, Takashi Isoshima, Eisuke Ito, Masahiko Hara, Whee Won Chin, Jin Wook Han, Hiroumi Kinjo, Yusuke Ozawa, Yasuo Nakayama, Hisao Ishii

    ECME2013  2013.9 

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    Venue：London, UK  

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  • Fabrication of nanoparticle single-electron transistors and photoinduced modulation in the charge transport property International conference

    Yutaka Noguchi, Makoto Yamamoto, Masanori Kobo, Hisao Ishii, Toshifumi Terui, Rieko Ueda, Keisuke Imazu, Kaoru Tamada

    SPIE NanoScience + Engineering  2013.8 

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    Venue：San Diego, USA  

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  • Photoinduced responses in a dye-doped gold nanoparticle single-electron device International conference

    Yutaka Noguchi, Makoto Yamamoto, Hisao Ishii, Toshifumi Terui, Rieko Ueda, Keisuke Imazu, Kaoru Tamada, Takeshi Sakano, Kenji Matsuda

    Seventh international conference on molecular electronics and bioelectronics (M&BE7)  2013.3 

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    Venue：Fukuoka (Japan)  

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  • Gold Nanoparticle Single-Electron Transistors with Molecular Floating Gates International conference

    Yutaka Noguchi, Makoto Yamamoto, Hisao Ishii, Toshifumi Terui, Rieko Ueda, Keisuke Imazu, Kaoru Tamada, Takeshi Sakano, Kenji Matsuda

    ICNME2012  2012.12 

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    Venue：Awaji Yumebutai International Conference Center  

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  • 有機 EL 素子の界面特性 Invited

    2012年度有機エレクトロニクスシンポジウム  2012.10 

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    Venue：パシフィコ横浜会議センター  

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  • Light-induced conductance switching in a gold nanoparticle transistor functionalized by copper phthalocyanine International conference

    Yutaka Noguchi, Makoto Yamamoto, Toshifumi Terui, Hisao Ishii, Keisuke Imazu, Ak- ihito Yoshida, Kaoru Tamada, Takeshi Sakano, Kenji Matsuda

    ICSM2012  2012.8 

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    Venue：Atlanta, USA  

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  • Interface Charges in Organic Light- Emitting Diodes: The Origin and Impacts on Device Properties Invited International conference

    Yutaka Noguchi, Yukimasa Miyazaki, Yuya Tanaka, Takamitsu Tamura, Kyung Jun Kim, Yasuo Nakayama, Wolfgang Bruetting, Hisao Ishii

    Fifth International Conference on Optical, Optoelectronic and Photonic Materials and Applications (ICOOPMA2012)  2012.6 

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    Venue：Nara  

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  • 単分子および金ナノ粒子トランジスタの電気伝導特性 Invited

    「単分子エレクトロニクス の現状認識と近未来実現へ向けての中核体制構築」 2011年度第3回研究会  2012.2 

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  • 有機半導体デバイス内部の 電界分布と電荷蓄積現象 Invited

    野口 裕, 宮崎行正, 田中有弥, Wolfgang Bruetting, 石井久夫

    情報科学用有機材料第 142 委員会, A 部会(液晶材料)第 121 回 B 部会(インテリジェント有機材料)第 113 回, C 部会(有機光エレクトロニクス)第 48 回, 合同研究会  2011.10 

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    Venue：東京理科大学森戸記念館第2フォーラム  

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  • Charge transport in various dimensions of small networks composed of gold nanoparticles and terthiophene wire-molecules International conference

    Yutaka. Noguchi, Toshifumi Terui, Takuya Katayama, Michio M. Matsushita, Tadashi Sugawara

    KJF-ICOMEP2011  2011.9 

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    Venue：Gyeongju, Korea  

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  • Charge transport properties of gold nanoparticle/molecular hybrids in a nanogap electrode: Coulomb interactions of two gold nanoparticles and effect of network dimensionality on conductance International conference

    Yutaka Noguchi, Toshifumi Terui, Takuya Katayama, Makoto Yamamoto, Hisao Ishii, Kenji Matsuda, Michio M. Matsushita, Tadashi Sugawara

    European Conference on Molecular Electronics2011  2011.9 

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    Venue：Barcelona  

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  • 分子の永久双極子に起因する 有機/有機界面の電荷蓄積現象

    野口 裕, 宮崎行正, 田中有弥, Wolfgang Bruetting, 石井久夫

    第 72 回 応用物理学会学術講演会  2011.8 

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    Venue：山形大学  

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  • 分子のダイポールモーメント と有機ヘテロ界面の電荷蓄積

    野口 裕, 宮崎行正, 田中有弥, Wolfgang Bruetting, 石井久夫

    第 12 回有機 EL 討論会  2011.6 

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    Venue：日本科学未来館 みらい CAN ホー ル  

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  • Carrier behaviors at organic heterointerfaces studied by displacement current measurement and impedance spectroscopy International conference

    Yutaka Noguchi, Yukimasa Miiyazaki, Yuya Tanaka, Wolfgang Bruetting, Yasuo Nakayama, Hisao Ishii

    Sixth International Conference on Molecular electronics and Bioelectronics (M&BE6)  2011.3 

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    Venue：Sendai, Japan  

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  • Interface charges and orientation polarization in organic light-emitting diodes International conference

    COE Start-up International Workshop "Organic Semiconductors Towards the Next"  2010.11 

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    Venue：Chiba, Japan  

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  • Charge accumulation mechanisms at organic heterointerfaces: interface charges and orientation polarization Invited International conference

    Yutaka Noguchi, Yukimasa Miiyazaki, Yasuo Nakayama, Wolfgang Bruetting, Hisao Ishii

    The 10th International Discussion & Conference on Nano Interface Controlled Electronic Devices (IDC-NICE 2010)  2010.10 

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    Venue：Jeju, Korea  

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  • Charge transport in low dimensional networks composed of molecularly wired gold nanoparticles International conference

    Yutaka Noguchi, Toshifumi Terui, Takuya Katayama, Michio M. Matsushita, Tadashi Sugawara

    International Conference of Science and Technology of Synthetic Metals 2010 (ICSM2010)  2010.7 

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    Venue：Kyoto, Japan  

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  • 金ナノ粒子/オリゴチオフェン複合体を用いた double-dot 単一電子トランジスタの電気伝導特性: 超周期性、エネルギーレべルシフト、および協調トンネリング

    野口 裕, 照井 通文, 片山 卓也, 松下 未知雄, 菅原 正

    第 57 回応用物理学会関係連合講演会  2010.3 

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  • Light Induced Space Charges in Tris- (8-hydroxyquinolate) aluminum-based Organic Light Emitting Diodes International conference

    Yutaka Noguchi, N. Sato, Y. Miyazaki, H. Ishii

    The 5th edition of the international workshop on ”Electronic Structure and Processes at Molecular-Based Interfaces” (ESPMI-V)  2010.1 

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    Venue：Chiba, Japan  

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  • Peculiar Shift in Hole Injection Voltage of Alq3-based Organic Light-Emitting Diode: Impact of Light Irradiation and Ion-gauge Operation During Device Fabrication International conference

    Yutaka Noguchi, N. Sato, Y. Miyazaki, Y. Nakayama, H. Ishii

    European Conference on Molecular Electronics 2009 (ECME2009)  2009.9 

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    Venue：Copenhagen, Denmark  

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  • Alq3 層を含む有機 EL 素子の正孔注入電圧における素子作製環境依存性

    野口 裕, 佐藤 直樹, 宮崎 行正, 中山 泰生, 石井 久夫

    有機 EL 討論会 第八回例会  2009.6 

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  • A higher resistance for hole injection induced by copper phthalocyanine interlayer in organic light- emitting diodes International conference

    Yutaka Noguchi, Naoki Sato, Yukimasa Miiyazaki, Yasuo Nakayama, Hisao Ishii

    M& BE5  2009.3 

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    Venue：Miyazaki, Japan  

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  • 有機 EL 素子のヘテロ界面における電荷蓄積過程

    野口 裕, 佐藤 直樹, 宮崎 行正, 田中 有弥, 中山 泰生, 石井 久夫

    有機 EL 討論会 第七回例会  2008.11 

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  • 有機 EL 素子における電荷蓄積機構の解析—CuPc 層の挿入効果—

    野口 裕, 佐藤直樹, 田中有弥, 宮崎行正, 中山泰生, 石井久夫

    2008 年秋季第 69 回応用物理学会学術講演会  2008.9 

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  • Does giant surface potential modify the performance of Alq3 based OLED? Voltage shift and charge traps induced by light irradiation International conference

    Yutaka Noguchi, Naoki Sato, Yuya Tanaka, Yasuo Nakayama, Hisao Ishii

    Photonic Devices+Applications, SPIE Optic+Photonics  2008.8 

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    Venue：SanDiego, USA  

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  • Alq3 を含む有機EL素子の変位電流特性~ヘテロ界面での正孔蓄積機構および成膜時の光照射効果~

    野口 裕, 佐藤 直樹, 田中 有弥, 中山 泰生, 石井 久夫

    有機エレクトロニクス研究会  2008.5 

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  • 変位電流評価法による a-NPD/Alq3 界面の正孔蓄積機構の解明

    野口 裕, 佐藤 直樹, 田中 有弥, 中山 泰生, 石井 久夫

    第 55 回応用物理学会関係連合講演会  2008.3 

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  • Charge transport through oligothiophene/gold nanoparticle composites in nanogap electrode International conference

    Yutaka Noguchi, T. Terui, T. Katayama, M. Matsushita, T. Sugawara

    DPG Physics School 2007 Charge Transport Through Organic Materials: From Single Molecules to De- vices  2007.9 

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    Venue：Bad Honnef, Germany  

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  • ナノギャップ電極を用いた金ナノ粒子/オリゴチオフェン 3mer 複合体の電気伝導特性評価

    野口 裕, 照井 通文, 片山 卓也, 松下 未知雄, 菅原 正

    第 68 回応用物理学会学術講演会  2007.9 

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  • 変位電流評価法による有機 EL 素子の電荷注入、蓄積、および放出過程の観測

    野口 裕, 佐藤 直樹, 田中 有弥, 中山 泰生, 石井 久夫

    第 68 回応用物理学会学術講演会  2007.9 

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  • Fowler-Nordheim Tunneling in Electromigrated Break Junctions with Porphyrin Derivatives International conference

    Yutaka Noguchi, Takashi Nagase, Rieko Ueda, Toshiya Kamikado, Tohru Kubota, and Shinro Mashiko

    2006 International Conference on Solid State Devices And Materials (SSDM)  2006.9 

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    Venue：Pacifico Yokohama, Yokohama, Japan  

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  • 有機単一電子トランジスタの作製

    野口 裕, 久保田 徹, 上田 里永子, 上門 敏也, 益子 信郎

    電子情報通信学会 OME 研究会  2006.7 

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    Venue：パシフィコ横浜  

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  • ポルフィリン誘導体 を用いた分子接合の電気伝導特性

    野口 裕, 永瀬 隆, 上田 里永子, 上門 敏也, 久保田 徹, 益子 信郎

    第 53 回応用物理学関係連合講演会  2006.3 

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    Venue：武蔵工業大学  

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  • Electron Transport Properties of Molecular Junctions Using Porphyrin Derivatives Invited International conference

    Yutaka Noguchi, Takashi Nagase, Rieko Ueda, Toshiya Kamikado, Tohru Kubota, and Shinro Mashiko

    Japan Nano 2006  2006.2 

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    Venue：Tokyo Big Sight, Tokyo, Japan  

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  • Current-Voltage Characteristics of Au-porphyrin derivatives-Au Junctions International conference

    Yutaka Noguchi, Takashi Nagase, Tohru Kubota, Toshiya Kamikado, and Shinro Mashiko

    2005 MRS Fall Meeting  2005.11 

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    Venue：Hynes Convention Center, Boston, USA  

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  • 積層型有機単一電子トンネル接合における光誘起ゲート効果 Invited

    野口 裕, 間中 孝彰, 岩本 光正

    第 66 回応用物理学会学術 講演会  2005.9 

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    Venue：徳島大学  

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  • Current-Voltage Characteristics of Au-porphyrin derivatives-Au Junctions Invited International conference

    Yutaka Noguchi, Takashi Nagase, Tohru Kubota, Toshiya Kamikado, and Shinro Mashiko

    International Conference of Orgatechno 2005  2005.7 

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    Venue：Tokyo Big Sight, Tokyo, Japan  

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  • エレクトロマイグレーション法を用いた分子接合の作製とその電気伝導特性

    野口 裕, 永瀬隆, 久保田徹, 上門敏也, 益子信郎

    第 52 回応用物理学関係連合講演会  2005.3 

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    Venue：埼玉大学  

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  • 有機単一電子トンネル接合の電流-電圧特性における光照射効果

    野口 裕, 久保田徹, 益子信郎, 若山裕, 間中孝彰, 岩本光正

    電子情報通信学会技術研究報告  2004.9 

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    Venue：大阪大学  

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  • Current-Voltage Characteristics of Molecular Junctions with Porphyrin Derivatives International conference

    Yutaka Noguchi, Takashi Nagase, Tohru Kubota, Toshiya Kamikado, and Shinro Mashiko

    The 11th International Conference on Organized Molecular Films  2004.6 

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    Venue：Gateauz Kingdom SAPPORO, Sapporo, Japan  

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  • Nano-Interfacial Space Charge and Single Electron Tunneling Conduction in Metal/ Polyimide/Metal Junctions International conference

    Yutaka Noguchi, Takaaki Manaka, and Mitsumasa Iwamoto

    The Tenth International Conference on Organized Molecular Films (LB10)  2003.10 

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    Venue：Friendship Hotel, Beijing, China  

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  • Photoinduced Gate Modulation and Temperature Dependence in the Coulomb Staircase of Organic Single Electron Tunneling Junctions International conference

    Yutaka Noguchi, Takaaki Manaka, and Mitsumasa Iwamoto

    2003 International Conference on Solid State Devices And Materials (SSDM)  2003.9 

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    Venue：Keio Plaza Hotel, Tokyo, Japan  

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  • 有機単電子トンネル素子における光誘起ゲート効果の金属/ ポリイミド界面空間電荷による検討

    野口 裕, 間中 孝彰, 岩本 光正

    第 64 回応用物理学会学術講演会  2003.9 

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    Venue：福岡大学  

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  • Light-induced gate operation in single electron tunneling device using organic thin films International conference

    Yutaka Noguchi, Yuma Suzue, Youhei Hirota, Takaaki Manaka, and Mitsumasa Iwamoto

    Second International conference on Molecular Electronics And Bioelectronics  2003.3 

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    Venue：Gakushi Kaikan, Tokyo, Japan  

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  • 有機超薄膜を用いた単電子トンネル素子における光誘起ゲート効果

    野口 裕, 鈴江 祐馬, 廣田 洋平, 間中 孝彰, 岩本 光正

    第 50 回応用物理学関係連合講演会  2003.3 

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    Venue：神奈川大学  

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  • Single electron transport in metal/polyimide:C60/metal junction International conference

    Yutaka Noguchi, Takaaki Manaka, and Mitsumasa Iwamoto

    5th International Conference on Nano-Molecular Electronics  2002.12 

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    Venue：Seaside hotel Maiko Villa, Kobe, Japan  

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  • C60・ポリイミド混合膜を用いた MIM 構造素子の電流-電圧特性

    野口 裕, 鈴江 祐馬, 間中 孝彰, 岩本 光正

    第 63 回応用物理学会学術講演会  2002.9 

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    Venue：新潟大学  

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  • Effect of interfacial space charges and coupling electrodes on organic single electron tunneling device International conference

    Yutaka Noguchi, Mitsumasa. Iwamoto, Tohru. Kubota, and Shinro Mashiko

    2nd ISOME 2002  2002.5 

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    Venue：Riken, Tsukuba, Japan  

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  • STM observation of Coulomb staircase behavior through C60 clusters International conference

    Yutaka Noguchi, Yuma Suzue, and Mitsumasa Iwamoto

    QTSM & QFS 2002  2002.5 

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    Venue：Yonsei University, Seoul, Korea  

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  • 有機単電子素子における界面空間電荷の影響 I I:微小多導体モデル

    野口 裕, 岩本 光正, 久保田 徹, 益子 信郎

    第 49 回応用物理学関係連合講演会  2002.3 

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    Venue：東海大学 湘南校舎  

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  • ローダミン色素分子を微小電極とした二重トンネル接合素子の特性解析

    野口 裕, 岩本 光正, 久保田 徹, 益子 信郎

    第 62 回応用物理学会学術講演会  2001.9 

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    Venue：新潟大学  

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  • 有機単電子トンネル素子特性における界面空間電荷の影響

    野口 裕, 真島 豊, 岩本 光正

    第 32 回電気電子絶縁材料システムシンポジウム  2000.11 

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    Venue：山王共済会館  

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  • 有機単電子トンネル素子における界面空間電荷の影響

    野口 裕, 真島 豊, 岩本 光正

    第 61 回応用物理学会学術講演会  2000.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道工業大学  

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  • Current-Voltage Characteristic With a Step Structure of Metal/Polyimide/Rho-damine-dendrimer/Polyimide/Metal Junction International conference

    Yutaka Noguchi, Yutaka Majima, Mitsumasa Iwamoto, Tohru Kubota, Shiyoshi Yokoyama, Tatsuo Nakahama, and Shinro Mashiko

    International Symposium on Organic Molecular Electronics  2000.5 

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Nagoya University Symposion  

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  • ポリイミド LB 膜の界面帯電現象と電気伝導機構

    野口 裕, 萩原 雄一, 真島 豊, 岩本 光正

    第 47 回応用物理学関係連合講演会  2000.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：青山学院大学  

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  • 金属/ポリイミド/ローダミンデンドリマー/ポリイミド/金属構造素子の電気伝導

    野口 裕, 萩原 雄一, 真島 豊, 岩本 光正, 久保田 徹, 益子 信郎

    第 60 回応用物理学会学術講演会  1999.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：甲南大学  

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Awards

  • 第17回有機EL討論会業績賞

    2024.6   有機EL討論会   有機EL材料の自発的配向分極に関する先駆的研究

    野口 裕

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    Award type：Award from Japanese society, conference, symposium, etc.  Country/Region：Japan

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  • IDW'19 Best Paper Award

    2020.1   International Display Workshop   Formation Mechanism of Spontaneous Orientation Polarization in Evaporated Films of Organic Light-Emitting Diode Materials

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    Award type：Award from international society, conference, symposium, etc.  Country/Region：Japan

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  • 有機 EL 討論会 第12回例会 講演奨励賞

    2011  

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    Award type：Award from Japanese society, conference, symposium, etc.  Country/Region：Japan

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  • ICNME2006 Outstanding Poster Presentation Award

    2006  

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    Award type：Award from international society, conference, symposium, etc.  Country/Region：Japan

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  • M&BE奨励賞

    2005   応用物理学会 有機分子・バイオエレクトロニクス分科会  

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    Award type：Award from Japanese society, conference, symposium, etc.  Country/Region：Japan

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  • 猪瀬学術奨励賞

    2000  

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    Award type：Award from publisher, newspaper, foundation, etc.  Country/Region：Japan

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Research Projects

  • Spontaneous orientation polarization in organic semiconductors -From basic science t o applications-

    Grant number：220253602  2025.4 - 2026.3

    Japan Society for the Promotion of Science  Bilateral Collaborations  seminar

    Yutaka Noguchi, Wolfgang Bruetting

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    Authorship：Principal investigator 

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  • Electronic and ionic charge-mediated exciton dynamics in organic and hybrid optoelectronics

    Grant number：JPJSBP120233508  2023.4 - 2025.3

    Japan Society for the Promotion of Science  Bilateral Collaborations  Research

    Yutaka Noguchi, Wolfgang Bruetting

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    Authorship：Principal investigator 

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  • Development of single-molecular light-emitting transistor

    Grant number：15K13293  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Noguchi Yutaka, MAJIMA Yutaka

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    Grant amount：\3900000 （ Direct Cost: \3000000 、 Indirect Cost：\900000 ）

    We proposed a new type of single-molecular light-emitting device fabricated in a nanogap electrode, where the light emission is obtained through an energy transfer from host to guest molecules. The efficient ambipolar charge injection from similar electrodes (gold) was realized by using a blend film of a light-emitting semiconducting polymer and ionic liquid, that is, a light-emitting electrochemical cell (LEC). In addition, due to the appropriate surface treatment for the SiO2 substrate, the active layer was successfully formed only on the electrodes and nanogap. Therefore the light emission is expected to occur at the nanogap. Finally, a current driven light emission from the nanogap LEC was successfully obtained.

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  • Elucidation of the mechanism of carrier injection and extraction at organic/electrode interfaces

    Grant number：25288114  2013.4 - 2016.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Ishii Hisao, NOGUCHI YUTAKA, NAKAYAMA YASUO, Rasika K. K.

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    Grant amount：\12870000 （ Direct Cost: \9900000 、 Indirect Cost：\2970000 ）

    In order to understand and improve electronic devices using organic semiconductors, it is indispensable to answer basic questions about "carrier" to carry electricity; "How is carrier injected to organics?", "How is carrier extracted from organics?" etc. The mechanism of carrier injection and extraction has been so far discussed on the basis of the energy position of frontier molecular orbital of organic materials. In this study, the electronic structures of films and interfaces of several organic materials were investigated by our unique technique, high sensitivity photoelectron spectroscopy, and the mechanism was discussed on the basis of the observed density of states as well as frontier orbital positions.

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  • Investigation of energy level alignment and charge transport properties of molecular junctions

    Grant number：24510148  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    NOGUCHI Yutaka, ISHII Hisao, NAKAYAMA Yasuo

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    Grant amount：\5590000 （ Direct Cost: \4300000 、 Indirect Cost：\1290000 ）

    We have investigated the charge transport mechanisms of metal/organic monolayer/metal structures based on the observation of energy level alignment. The followings have been found; (i)contribution of the localized electronic state at the interface originating from the metal/molecule bonding, (ii)contribution of asymmetry factor of the molecular junction, (iii)contribution of different states depending on the polarity of the applied voltage. These contributions have not been considered sufficiently. Our results provide deeper understandings of the charge transport mechanisms of the molecular junctions.

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  • Device properties and degradation mechanisms of organic light-emitting diodes composed of organic layers with orientation polarization

    Grant number：22750167  2010 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    NOGUCHI Yutaka

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    Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）

    Findings of this study are as follows : 1) Several polar molecules that are commonly used in organic semiconductor devices spontaneously forms orientation polarization in their evaporated films. 2) The origin of interface charge at organic hetero interfaces is polarization charge originating from the orientation polarization. 3) Presence of polar molecules in the vicinity of organic hetero interface suppresses charge dispersion. 4) Light irradiation during the film formation of a polar molecule changes the charge accumulation property in the resultant devices, and causes a shorter lifetime. These findings indicate that permanent dipole moment is an important parameter that strongly affects on the device properties of organic semiconductor devices.

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  • Elucidation of Electronic Properties of Organic Semiconductors by Direct Observation of Frontier Density of States

    Grant number：21245042  2009 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    ISHII Hisao, NOGUCHI Yutaka, NAKAYAMA Yasuo, MIYAMAE Takayuki

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    Grant amount：\43420000 （ Direct Cost: \33400000 、 Indirect Cost：\10020000 ）

    In order to understand the mechanism of electronic devices using organic molecules, it is indispensable to elucidate how electrons are stored in molecules. So far, it has been investigated focusing on electronic states such as HOMO and LUMO. But other electronic states called gap s t at e s , whose density is less than one thousandth of HOMO, is also important for device physics. In this study, we have developed an apparatus to directly measure such gap states, and investigated the electronic structures of various organic semiconductors.

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  • Evaluation of flexible interfacial monolayer on the basis of MDC-SHG measurement and its shape control

    Grant number：19206034  2007 - 2009

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    IWAMOTO Mitsumasa, MANAKA Takaaki, NOGUCHI Yutaka

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    Grant amount：\47840000 （ Direct Cost: \36800000 、 Indirect Cost：\11040000 ）

    We developed a visualization system of domain formation on a water surface, and the effect of electric quadrupole and chirality on a quantized domain formation has been revealed. Using time-resolved microscopic optical second harmonic generation system for direct visualization of carrier motion, we could analyze the carrier transport mechanism in organic devices. Finally, we could establish the evaluation method for flexible organic devices in terms of the dielectric physics, on focusing dielectric polarization phenomena.

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  • 有機半導体の高純度精製法の開発

    Grant number：19655065  2007 - 2008

    日本学術振興会  科学研究費助成事業  萌芽研究

    石井 久夫, 野口 裕, 中山 泰生

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    Grant amount：\3100000 （ Direct Cost: \3100000 ）

    現在のシリコンテクノロジ-が超高純度単結晶の作製技術の進展とともに大きく花開いたのに対して、次世代エレクトロニクス材料として注目されている有機半導体は、超高純度試料を得ることが難しいという技術的な大きな課題を抱えている。本研究は、(i)アルキメデスポンプ型ゾーン精製法と(ii)2次元拡散型昇華精製法という2つの新しい超高純度精製手法の開発を試みることを目的とした。今年度は、H19年度に整備した従来型の精製装置を利用して、ノウハウを蓄積し、ルプレンの精製ならびに単結晶作成、ならびに有機EL材料の精製評価を行った。液体クロマトグラフィーやガスクロマトグラフィーで純度評価を行うとともに、トランジスター化して変位電流測定からキャリア注入やキャリアトラップ密度などに関して評価した。光電子収量分光により電子構造を評価するととも、飛行時間型移動度測定装置を作成しキャリア移動度測定も行った。これらの整備により、スタンダードな試料精製とそのデバイス特性・物性評価のサイクルができあがり、本格的な高純度化の環境構築が終了した。
    試料精製は、事前に予想した以上にノウハウと評価手法の確立に時間を要したため、当初計画より進行が遅れた。現在、新しい精製法に関して研究をすすめているところであり、高純度精製への努力を続けて行きたい。

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  • Search and Elucidation of Ferro-electric Nature of OrganicSemiconductors

    Grant number：18350093  2006 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    HISAO Ishii, NOGUCHI Yutaka, NAKAYAMA Yasuo

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    Grant amount：\16250000 （ Direct Cost: \14300000 、 Indirect Cost：\1950000 ）

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  • Development of the two-color sum-frequency gener at ion spectrometer with wide range wavelength tunability

    Grant number：18550025  2006 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    MIYAMAE Takayuki, MORITA Akihiro, OOUCHI Yukio, ISHII Hisao, NOGUCHI Yutaka

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    Grant amount：\3970000 （ Direct Cost: \3400000 、 Indirect Cost：\570000 ）

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  • 静電トラップ法を用いた極性分子接合の作製とその電気伝導特性評価

    Grant number：17710110  2005 - 2007

    日本学術振興会  科学研究費助成事業  若手研究(B)

    野口 裕

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    Grant amount：\3600000 （ Direct Cost: \3600000 ）

    電極と分子との接触を制御した分子接合を作製し、その電気伝導特性を評価することは分子エレクトロニクスにおける重要な課題である。本研究では、電場印加によりナノギャップ電極へ選択的に測定対象分子を吸着させること、及び作製した分子接合の電気特性評価を目的としている。固体基板上に作製したナノギャップ電極を用いた分子接合では、トランジスタ特性や温度依存性の測定が可能であるが、ギャップ間分子の状態を評価することが難しかった。我々は、直径約6nmの金ナノ粒子をオリゴチオフェン3量体の自己組織化単分子膜で修飾した複合体(Au_x/3T)を用いることで、電子顕微鏡により観察可能な分子接合を作製し、その試料構造と電気伝導特性(トランジスタ特性、温度特性:11〜300K)を直接対応づけて調べることができた。
    少数Au_x/3Tで架橋した接合では、低温で明確な単一電子トンネル伝導が観測された。また、Au_x/3Tと電極との接触抵抗値は、これまでに別の手法を用いて測定された3Tのトンネル抵抗とよく一致した。このことは、本手法において分子数個程度のコンダクタンスが測定可能であることを示している。さらに、接合のコンダクタンスの温度特性から見積もられた活性化エネルギーは、金ナノ粒子のネットワーク構造に依存して変化することを見出した。これらの特性を金ナノ粒子のクーロン帯電効果を考慮することにより説明した。
    本手法は広く応用が可能であり、現在、光異性化反応を示す分子(ジアリールエテン誘導体)で修飾した金ナノ粒子の電気伝導特性を測定している。その他、有機エレクトロルミネッセンス素子材料であるAlq_3を含んだ素子では、その特性がAlq_3層の配向分極に強く依存することを見出している。

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  • CHARATRETIZATION OF FLEXIBLE NANO INTERFACIAL FILM BY MEANS OF MAXWELL DISPLACEMENT CURRENT AND OPTICAL SECOND HARMONIC GENERATION

    Grant number：15206032  2003 - 2006

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    IWAMOTO Mitsumasa, MANAKA Takaaki, NOGUCHI Yutaka, ZHOU Xin

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    Grant amount：\48360000 （ Direct Cost: \37200000 、 Indirect Cost：\11160000 ）

    The purpose of this investigation was to characterize the linear and nonlinear dielectric properties of organic monolayer films by means of Maxwell-displacement current (MDC) and optical Second Harmonics Generation (SHG) measurement. The macroscopic dielectric properties such as linear and nonlinear dielectric constants are strongly related to the orientational order parameters of the constituent molecules. From this point of view, this investigation has been carried out on the basis of the idea of MDC measurement coupled with SHG measurement, proposed by the investigators.
    (1)Interfacial monolayer was treated as a flexible system. Direction of molecules is restricted by the presence of interface, and thus the specific polarizations such as spontaneous polarization and nonlinear polarization are induced. We investigate such polarization to evaluate the flexibility of the system. We can find the relationship between flexibility of films and the electrical property of them.
    (2)We used rod-like liquid crystalline molecules, biological molecules, chiral helix molecules and photo-isomers. Langmuir monolayers of these molecules were formed and measure the MDC and SHG. According to the result obtained from the MDC and SHG measurement, we can reveal the geometrical and electronic structure of monolayers. In particular, we successfully reproduce the pattern formation of molecular domains on a water surface.
    (3)For organic devices, such as organic field effect transistor and organic electro luminescent devices, we propose novel techniques for evaluating the electric field distribution in the devices and for probing the carrier motion in the devices. Also, we proposed a model which describes the operation of the organic field effect transistors on the basis of Maxwell-Wagner analysis.

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Teaching Experience

  • 分子工学特論第三

    2025.1 Institution：京都大学

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  • 電気電子材料１

    Institution：明治大学

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  • 量子物質科学特別講義A

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  • 電子物性2

    Institution：明治大学

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  • 有機機能材料

    Institution：明治大学

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  • 分子ナノエレクトロニクス特論

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  • 基礎電気磁気学2

    Institution：明治大学

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  • 分子エレクトロニクス

    Institution：明治大学

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  • 電気電子生命概論

    Institution：明治大学

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  • 電気電子材料２

    Institution：明治大学

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  • 電気電子生命実験

    Institution：明治大学

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  • 電気回路1

    Institution：明治大学

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  • 電気磁気学２

    Institution：明治大学

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Social Activities

  • 高大連携プログラム授業 講師

    Role(s)： Lecturer

    2023.5

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    Type：Visiting lecture

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  • 高大連携プログラム授業 講師

    Role(s)： Lecturer

    2016.7

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    Audience： High school students

    Type：Visiting lecture

    有機エレクトロニクスの概要について、高校生向けに講義した。

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  • 高校生理科研究発表会 審査員

    2014.9

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