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Improvement of carrier mobility in polycrystalline organic semiconductor thin films

Research Project

Project/Area Number 19K15048
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21060:Electron device and electronic equipment-related
Research InstitutionKobe University

Principal Investigator

Hattori Yoshiaki  神戸大学, 工学研究科, 助教 (90736654)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords有機半導体 / 結晶性賞 / 真空蒸着 / 光学的異方性 / 単分子有機薄膜 / 結晶成長 / 表面拡散 / エッジ拡散 / 2次元島 / トランジスタ
Outline of Research at the Start

有機半導体デバイスには機械的に曲げられる機能性を付加できる利点があるが、実用化に向けた課題は移動度の向上である。本研究では真空蒸着法によって作製した多結晶有機薄膜の移動度向上を目的とする。多結晶薄膜において、移動度を律速している要因は結晶粒界でのキャリア散乱であるため、結晶粒界を制御することが重要である。そこで、本研究では結晶粒を大きくすることにより、結晶粒界の数を減らして移動度を向上させることを研究の方針とし、最適な有機材料や蒸着条件を検討する。

Outline of Final Research Achievements

The quality of an organic film considerably affects the performance of electronic devices. Therefore, the characterization of organic films is an important issue for the realization of good electronic devices and for the preparation of ideal films. In this study, crystals of an organic thin film with a thickness of several nm are evaluated with an optical microscope under atmospheric pressure. By using the visualization technique, the growth mechanism of organic films was investigated.

Academic Significance and Societal Importance of the Research Achievements

有機トランジスタの性能を劣化させる結晶粒界を可視化する既存の技術は、真空中で電子線を使う手法や、走査型プローブ顕微鏡を利用したものがあり、測定に時間がかかる問題があった。本研究で開発した手法は、有機分子のダメージが少ない光によって大気圧化で簡便に評価することができる。さらに、シリコン基板上で評価ができるので、有機トランジスタの作成プロセス中に薄膜の評価ができる特徴がある。本手法は、有機薄膜に限らず、無機材料にでも適応できる手法であり、厚さ数nmの極薄膜を可視化する手法として、広く応用することが可能である。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2020 2019

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Crystal Orientation Imaging of Organic Monolayer Islands by Polarized Light Microscopy2020

    • Author(s)
      Hattori Yoshiaki、Kitamura Masatoshi
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 12 Issue: 32 Pages: 36428-36436

    • DOI

      10.1021/acsami.0c08672

    • NAID

      120006884210

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Energy distribution of interface states generated by oxygen plasma treatment for control of threshold voltage in pentacene thin-film transistors2020

    • Author(s)
      Kimura Yoshinari、Hattori Yoshiaki、Kitamura Masatoshi
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 53 Issue: 50 Pages: 505106-505106

    • DOI

      10.1088/1361-6463/abb554

    • NAID

      120006894039

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of organic metal-oxide-semiconductor capacitors based on a distributed constant circuit2020

    • Author(s)
      Kimura Yoshinari、Hattori Yoshiaki、Kitamura Masatoshi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: 3 Pages: 036503-036503

    • DOI

      10.35848/1347-4065/ab755b

    • NAID

      120006876722

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Wide-range work function tuning in gold surfaces modified with fluorobenzenethiols toward application to organic thin-film transistors2020

    • Author(s)
      Yoshioka Takumi、Fujita Hiroki、Kimura Yoshinari、Hattori Yoshiaki、Kitamura Masatoshi
    • Journal Title

      Flexible and Printed Electronics

      Volume: 5 Issue: 1 Pages: 014011-014011

    • DOI

      10.1088/2058-8585/ab71e3

    • NAID

      120006888534

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The growth mechanism and characterization of few-layer diphenyl dinaphthothienothiophene films prepared by vacuum deposition2019

    • Author(s)
      Hattori Yoshiaki、Kimura Yoshinari、Yoshioka Takumi、Kitamura Masatoshi
    • Journal Title

      Organic Electronics

      Volume: 74 Pages: 245-250

    • DOI

      10.1016/j.orgel.2019.07.014

    • NAID

      120006733167

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Data on optical microscopy and vibrational modes in Diphenyl Dinaphthothienothiophene thin films2019

    • Author(s)
      Hattori Yoshiaki、Kimura Yoshinari、Yoshioka Takumi、Kitamura Masatoshi
    • Journal Title

      Data in Brief

      Volume: 26 Pages: 104522-104522

    • DOI

      10.1016/j.dib.2019.104522

    • NAID

      120006770401

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nucleation Density and Shape of Submonolayer Two-Dimensional Islands of Diphenyl Dinaphthothienothiophene in Vacuum Deposition2019

    • Author(s)
      Hattori Yoshiaki、Kimura Yoshinari、Kitamura Masatoshi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 124 Issue: 1 Pages: 1064-1069

    • DOI

      10.1021/acs.jpcc.9b08628

    • NAID

      120006782253

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Evaluation of carrier mobility in organic metal-oxide-semiconductor capacitors2020

    • Author(s)
      Yoshinari Kimura, Yoshiaki Hattori, Masatoshi Kitamura
    • Organizer
      39th Electronic Materials Symposium
    • Related Report
      2020 Annual Research Report
  • [Presentation] Highly thermal-stable monolayers formed on a gold surface using benzenedithiol2020

    • Author(s)
      Hayato Takahashi, Naoki Ikematsu, Yoshiaki Hattori, and Masatoshi Kitamura
    • Organizer
      39th Electronic Materials Symposium
    • Related Report
      2020 Annual Research Report
  • [Presentation] Nucleation and shape of 2D islands of DPh-DNTT thin-films prepared by vacuum evaporation.2019

    • Author(s)
      Y. Hattori, Y. Kimura, M. Kitamura
    • Organizer
      Compound Semiconducotr Week (csw2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 単層 DPh-DNTT の2次元アイランドにおける異方性2019

    • Author(s)
      服部 吉晃, 木村 由斉, 北村 雅季
    • Organizer
      第80回応用物理学会学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Statistical study of shape for submonolayer 2D islands of DPh-DNTT prepared by vacuum deposition2019

    • Author(s)
      Y. Hattori, Y. Kimura, M. Kitamura
    • Organizer
      38th Electronic Materials Symposium
    • Related Report
      2019 Research-status Report
  • [Presentation] 偏光顕微鏡を用いた単層DPh-DNTT二次元核の方位決定2019

    • Author(s)
      服部 吉晃, 北村 雅季
    • Organizer
      第67回応用物理学会学術講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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