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2008 Fiscal Year Annual Research Report

有機デバイス材料の個性を知る:移動度の直接評価

Research Project

Project/Area Number 20656002
Research Category

Grant-in-Aid for Exploratory Research

Research InstitutionChiba University

Principal Investigator

解良 聡  Chiba University, 大学院・融合科学研究科, 准教授 (10334202)

Keywords電荷移動度 / 有機半導体 / ホッピング伝導 / 紫外光電子分光 / 電子構造 / 再配向エネルギー
Research Abstract

ホッピング伝導およびバンド伝導は有機半導体薄膜における重要な電荷輸送機構であり、その中身を定量的に理解することがデバイス特性の飛躍的向上へ不可欠である。我々はグラファイト上に有機半導体分子を真空蒸着し高配向膜を作製することで、ホッピング伝導の中身である二つの物理量「再配向エネルギー」と「トランスファー積分」を求める手法を提唱した。本課題では古来の手法である紫外光電子分光法(UPS)を高度な実験技法によって新規視点で活用し、分光学的手法のみで直接、第一原理的に移動度を求める。分子本来が持ちうる個性を数値化することで、産業界へ斬新なデバイス設計指針を与えることが目的である。20年度は、ルブレン分子、フッ素置換TCNT分子、BTQBT分子などの高配向単分子膜を作製し、高分解能スペクトルを得ることに成功した。現在、得られた最高占有準位の微細振動カップリング構造から再配向エネルギーを求めるべく、データ解析をすすめている。しかし一方のトランスファー積分の評価を行うための、十分に配向した結晶膜もしくは二量体膜の形成が困難であり、移動度の総合的な議論をすることはできていない。現在、種々の条件をパラメータに試料膜作製法を模索している。また本課題の主題である電荷移動度の第一原理測定がハイライト研究として評価され、「Progress in Surface Science誌」において総説を発表した(印刷中)。

  • Research Products

    (15 results)

All 2009 2008 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (12 results) Remarks (1 results)

  • [Journal Article] Electron spectroscopy of functional organic thin films: Deep insights into valence electronic structure in relation to charge trans port property2008

    • Author(s)
      N. Ueno and S. Kera
    • Journal Title

      Progress in Surface Science 83

      Pages: 490-557

    • Peer Reviewed
  • [Journal Article] Energy band and electron-vibration coupling in organic thin films: Photoelectron spectroscopy as a powerful tool for studying the charge transport2008

    • Author(s)
      N. Ueno et al.
    • Journal Title

      Applied Physics A: Materials Science and Processing 92

      Pages: 495-504

    • Peer Reviewed
  • [Presentation] Substrate-induced molecular orientation of CIGa-phthalocyanine studied by MAES and UPS2009

    • Author(s)
      T. Hosokai et al.
    • Organizer
      73th. Physikertagung der DPG
    • Place of Presentation
      Dresden, Germany
    • Year and Date
      2009-03-23
  • [Presentation] Correlating bonding distance and interfacial electronic structure: the role of molecular side arouns2009

    • Author(s)
      S. Duhm et al.
    • Organizer
      73th. Physikertagung der DPG
    • Place of Presentation
      Dresden, Germany
    • Year and Date
      2009-03-23
  • [Presentation] Electronic fine structures of perfluoropentacene films by ultraviolet photoelectron spectroscopy2009

    • Author(s)
      S. Hosoumi et al.
    • Organizer
      73th. Physikertagung der DPG
    • Place of Presentation
      Dresden, Germany
    • Year and Date
      2009-03-23
  • [Presentation] Evolution of the 3d-derived states in transition metal-phthalocy anine films2009

    • Author(s)
      S. Kera et al.
    • Organizer
      The 5th International Conference on Molecular Electronics and Bioelectronics
    • Place of Presentation
      Miyazaki, Japan
    • Year and Date
      2009-03-18
  • [Presentation] Bridge over a molecular property from vdW interaction to strong crrelation2009

    • Author(s)
      S. Kera
    • Organizer
      Mini Symposium on the Electronic Structure of Organic Molecules and Solids
    • Place of Presentation
      Chiba, Japan
    • Year and Date
      2009-02-03
  • [Presentation] Electronic structure of weakly interacting organic films: Localized and delocalized state2008

    • Author(s)
      S. Kera
    • Organizer
      Workshop on Electrical and Electronic Properties in Crystalline Thin Films of Small-Molecules
    • Place of Presentation
      Chiba, Japan
    • Year and Date
      2008-12-19
  • [Presentation] A fascinating molecule: Mn-Phthalocyanine2008

    • Author(s)
      S. Kera
    • Organizer
      Workshop on Resent research in organic and molecular electronics
    • Place of Presentation
      Chiba, Japan
    • Year and Date
      2008-11-11
  • [Presentation] Vibrational properties of pi-conjugated molecules deposited on graphite2008

    • Author(s)
      K. Fujii et al.
    • Organizer
      25th European Conference on Surface Science
    • Place of Presentation
      Liverpool, UK
    • Year and Date
      2008-07-26
  • [Presentation] Hopping mobility of perfluoropentacene films measured with high-resolution UPS : Effects of fluorination on the charge reorgan ization energy of pentacene films2008

    • Author(s)
      S. Hosoumi et al.
    • Organizer
      8th International Symposium on Functional π-Electron Systems
    • Place of Presentation
      Graz, Austlia
    • Year and Date
      2008-07-21
  • [Presentation] Theoretical analysis of spin-polarized pi-d hybridized states of Mn-nhthalocvanine2008

    • Author(s)
      S. Nagamatsu et al.
    • Organizer
      Electronic Structure and Processes at Molecular-Based Interfaces
    • Place of Presentation
      Princeton, USA
    • Year and Date
      2008-06-10
  • [Presentation] Direct study of the gap states in organic semiconductors with ultralow background UPS:Impact of the gap states on the Fermi level position2008

    • Author(s)
      T. Sueyoshi et al.
    • Organizer
      Electronic Structure and Processes at Molecular-Based Interfaces
    • Place of Presentation
      Princeton, USA
    • Year and Date
      2008-06-10
  • [Presentation] Spontaneous Charge Transfer at Physisorbed Molecular Interfaces2008

    • Author(s)
      S. Kera et al.
    • Organizer
      Electronic Structure and Processes at Molecular-Based Interfaces
    • Place of Presentation
      Princeton, USA
    • Year and Date
      2008-06-10
  • [Remarks]

    • URL

      http://ulab-www.tf.chiba-u.jp/

URL: 

Published: 2010-06-11   Modified: 2016-04-21  

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