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Electoronic states of organic semiconductor/ionic liquids interface using electrochemical ATR-UV spectroscopy

Research Project

Project/Area Number 20K15312
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionRikkyo University (2022)
Osaka University (2020-2021)

Principal Investigator

Tanabe Ichiro  立教大学, 理学部, 准教授 (80709288)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords界面分光 / トランジスター / ATR分光 / 紫外可視分光 / 電気化学 / 紫外分光 / イオン液体 / 有機半導体 / トランジスタ / 電気二重層 / 紫外ATR分光
Outline of Research at the Start

申請者が最近開発した、電気化学環境下で測定可能な減衰全反射型紫外分光装置(EC-ATR-UV装置)を利用して、近年注目を集めるイオン液体-電気二重層-有機電界効果トランジスタ(IL-EDL-OFET)の有機半導体/電極界面での電子状態を明らかにすることを目的にする。「界面」の「電子状態」を「電気化学環境下」で測定できる本分析手法の強みを活かし、近年注目される有機電気化学デバイス研究に展開する。

Outline of Final Research Achievements

In this study, we aimed to elucidate the electronic states at the organic semiconductor/ionic liquid interfaces of ionic liquid gated electronic double layer organic field effect transistors (IL-EDL-OFET) using an electrochemical attenuated total reflection ultraviolet spectroscopy (EC-ATR-UV). As a result, we revealed the spectral changes of the organic semiconductor thin film and the interface ion liquid induced by applied voltage. The spectral changes in the organic semiconductor thin film strongly reflected the transistor characteristics. Furthermore, the detection of spectral changes in the interface ion liquid was a unique achievement of the ATR-UV spectroscopy with a short optical path length.

Academic Significance and Societal Importance of the Research Achievements

研究対象としたイオン液体-電気二重層-有機電界効果トランジスタ(IL-EDL-OFET)は、従来のトランジスタの1%以下の電圧で動作する、省電力型デバイスである。このトランジスタの劇的な低電圧駆動は、有機半導体/イオン液体界面に形成される電気二重層によりキャリアが効率的に注入されることに由来する。本研究で開発した電気化学環境下で測定可能な減衰全反射型紫外分光装置(EC-ATR-UV装置)では、この界面部分を測定することが可能であり、実際にトランジスタ動作中の界面スペクトルの測定に成功した。また、測定したスペクトルとデバイス特性の間に相関がみられた。本手法は、様々なデバイスに応用可能である。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (14 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 7 results,  Invited: 4 results)

  • [Journal Article] Solvation properties of silver ions in ionic liquids using attenuated total reflectance ultraviolet spectroscopy2022

    • Author(s)
      Imai Masaya、Tanabe Ichiro、Ozaki Yukihiro、Fukui K.
    • Journal Title

      Journal of Molecular Liquids

      Volume: 364 Pages: 119998-119998

    • DOI

      10.1016/j.molliq.2022.119998

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Local structures and dynamics of interfacial imidazolium-based ionic liquid depending on the electrode potential using electrochemical attenuated total reflectance ultraviolet spectroscopy2022

    • Author(s)
      Imai Masaya、Tanabe Ichiro、Sato Taiki、Fukui Ken-ichi
    • Journal Title

      Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

      Volume: 273 Pages: 121040-121040

    • DOI

      10.1016/j.saa.2022.121040

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electronic excitation spectra of organic semiconductor/ionic liquid interface by electrochemical attenuated total reflectance spectroscopy2021

    • Author(s)
      Ichiro Tanabe, Iroha Imoto, Daijiro Okaue, Masaya Imai, Shohei Kumagai, Tatsuyuki Makita, Masato Mitani, Toshihiro Okamoto, Jun Takeya, Ken-ichi Fukui
    • Journal Title

      Communications Chemistry

      Volume: 4 Issue: 1 Pages: 88-88

    • DOI

      10.1038/s42004-021-00525-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Attenuated total reflectance far-ultraviolet and deep-ultraviolet spectroscopy analysis of the electronic structure of a dicyanamide-based ionic liquid with Li+2020

    • Author(s)
      Imai Masaya、Tanabe Ichiro、Ikehata Akifumi、Ozaki Yukihiro、Fukui Ken-ichi
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 22 Issue: 38 Pages: 21768-21775

    • DOI

      10.1039/d0cp03865b

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 電気化学ATR紫外可視分光法の開発とイオン液体/有機半導体界面への応用2022

    • Author(s)
      田邉 一郎, 井本彩葉, 岡上大二朗, 今井雅也, 熊谷翔平, 牧田龍幸, 三谷真人, 岡本敏宏, 竹谷純一, 福井賢一
    • Organizer
      第16回分子化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Electronic states analysis of organic semiconductor/ionic liquid interface by attenuated total reflectance ultraviolet-visible spectroscopy2022

    • Author(s)
      I. Tanabe, I. Imoto, D. Okaue, M. Imai, S. Kumagai, T. Makita, M. Mitani, T. Okamoto, J. Takey, and K. Fukui
    • Organizer
      IVC-22 The International Vacuum Congress 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Attenuated Total Reflectance Ultraviolet Spectroscopy in Electrochemical Environment2022

    • Author(s)
      I. Tanabe and K. Fukui
    • Organizer
      第2回ハイドロジェノミクス国際会議
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Electrochemical Far- and Deep-Ultraviolet Spectroscopy Applied for Organic Semiconductor/Ionic Liquids Interfaces2022

    • Author(s)
      I. Tanabe
    • Organizer
      FACSS Scix 2022 The Federation of Analytical Chemistry and Spectroscopy Societies, The great scientific exchange 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of electrochemical far- and deep-ultraviolet spectroscopy2021

    • Author(s)
      I. Tanabe and K. Fukui
    • Organizer
      Pacifichem 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spectroscopic analyses of solvation structure for metal ions formed by ionic liquid using attenuated total reflectance; far ultraviolet (ATR-FUV) spectroscopy2021

    • Author(s)
      M. Imai, I. Tanabe, A. Ikehata, Y. Ozaki and K. Fukui
    • Organizer
      Pacifichem 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Electrochemical ATR ultraviolet-visible spectroscopy applied for organic semiconductor/ionic liquid interface2021

    • Author(s)
      I. Tanabe, I. Imoto, D. Okaue, M. Imai, S. Kumagai, T. Makita, M. Mitani, T. Okamoto, J. Takey, and K. Fukui
    • Organizer
      ISSS 9 (The 9th International Symposium on Surface Science)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Electrochemical attenuated total reflectance spectroscopy in far- and deep-ultraviolet regions2021

    • Author(s)
      I. Tanabe and K. Fukui
    • Organizer
      SPIE Annual meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 電気化学ATR紫外可視分光法による有機半導体/イオン液体界面の電子状態研究2021

    • Author(s)
      田邉一郎
    • Organizer
      ナノプローブテクノロジー第167委員会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Electrochemical ATR ultraviolet-visible spectroscopy2021

    • Author(s)
      田邉一郎
    • Organizer
      ナノ構造・物性-ナノ機能・応用部会合同シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2020-04-28   Modified: 2024-01-30  

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