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2011 Fiscal Year Annual Research Report

パイ共役分子による低次元超格子ヘテロ界面構造とその電子状態

Research Project

Project/Area Number 23360005
Research InstitutionChiba University

Principal Investigator

解良 聡  千葉大学, 大学院・融合科学研究科, 准教授 (10334202)

Keywords有機半導体 / 表面界面物性 / 電子分光 / 電子構造 / 有機ヘテロ超格子 / 有機単結晶 / 電荷移動度 / 分子間相互作用
Research Abstract

本研究では極めて詳細な電子分光実験を通して、有機半導体薄膜の電子構造の観点から、その背景に広がる独特な電子物性を理解すべく研究を進めている。弱い相互作用で結ばれた分子性固体中の電荷の動きを如何にして捉えるか、電子論として如何に物理的に記述できるかが命題である。光電子分光法という古来の手法を高精度測定を通じて斬新に活用することにより、キャリア伝導機構の重要な因子である再配向エネルギーとトランスファー積分の両者に直接的に踏み込むことができる。
今年度の主な成果として、(1)有機超伝導物質ピセンの単結晶試料におけるエネルギー分散関係の決定(雑誌Phys.Rev.Lett.にて発表)、(2)有機半導体ヘテロ界面の結晶性と電子構造の相関(投稿中)、(3)配向単分子層薄膜における分子ダイポールを利用した分子メモリ機能の評価、(4)分子骨格の自由度とポーラロン結合エネルギーの評価、(5)分子双極子を有するパイ共役分子の吸着構造の定量決定、があげられる。特に(3)については、極性フタロシアニン薄膜の単分子配向薄膜を作製し、走査プローブ顕微鏡の探針を利用して、分子双極子ベクトルの反転動作を確認した。これにより超高密度メモリへの応用展開が期待できる(雑誌Smallにて発表)。(4)については高精度電子構造測定により、高移動度分子材料であるルブレンの再配向エネルギーを実験的に初めて検証したものである(雑誌Advanced Materialにて発表)。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

23年度当初計画の実験は実施でき、有機半導体の電荷輸送問題において多くの成果が得られたが、有機ヘテロ界面の電子構造については、想定した事象外の結果も現れており、明確な成果を見出すにはいたっていない。

Strategy for Future Research Activity

当初計画どおり、装置の改造を進める。すでに設計の最終段階に入っており、作業は予定通りである。また新奇に観測されたヘテロ界面における電子構造の起源を明確にするために、新たに走査プローブ顕微鏡による表面二次元構造を決定するための実験を検討する。

  • Research Products

    (29 results)

All 2012 2011 Other

All Journal Article (11 results) (of which Peer Reviewed: 10 results) Presentation (17 results) Remarks (1 results)

  • [Journal Article] Reversible single-molecule switching in an ordered monolayer molecular dipole array2012

    • Author(s)
      Y.L.Huang, Y.Lu, T.C.Niu, H.Huang, S.Kera, N.Ueno, ATS.Wee, and W.Chen
    • Journal Title

      Small

      Volume: 8(9) Pages: 1423-1428

    • DOI

      10.1002/smll.201101967

    • Peer Reviewed
  • [Journal Article] Charge reorganization energy and small polaron binding energy of rubrene thin films by ultraviolet photoelectron spectroscopy2012

    • Author(s)
      S.Duhm, Q.Xin, S.Hosoumi, H.Fukagawa, K.Ssto, N.Ueno, and S.Kera
    • Journal Title

      Advanced Materials

      Volume: 24(7) Pages: 901-905

    • DOI

      10.1002/adma.201103262

    • Peer Reviewed
  • [Journal Article] Correlating Temperature Dependent Electrical Transport Through Alkyl Monolayers with vibrational and Photoelectron Spectroscopies2012

    • Author(s)
      H.Shpaisman, et al.
    • Journal Title

      Chamical Science

      Volume: 3 Pages: 851-862

    • DOI

      10.1039/clsc00639h

    • Peer Reviewed
  • [Journal Article] Tunable two-dimensional molecular dipole dot arrays on graphite2011

    • Author(s)
      T.C.Niu, Y.L.Huang, J.T.Sun, S.Kera, N.Ueno, A.T.S.Wee, and W.Chen
    • Journal Title

      Appl. Phys. Lett.

      Volume: 99 Pages: 143114-1-3

    • DOI

      10.1063/1.3647563

    • Peer Reviewed
  • [Journal Article] Orientational ordering of non-planar phthalocyanines on Cu(111) : Strength and orientation of the electric dipole moment2011

    • Author(s)
      A.Gerlach, T.Hosokai, S.Duhm, S.Kera, O.T.Hofmann, E.Zojer, J.Zegenhagen, F.Schreiber
    • Journal Title

      Phys. Rev. Lett.

      Volume: 106 Pages: 156102-1-4

    • DOI

      10.1103/PhysRevLett.106.156102

    • Peer Reviewed
  • [Journal Article] Tunable two-dimensional molecular dipole dot arrays on graphite2011

    • Author(s)
      Q.Xin, et al.
    • Journal Title

      Journal of Physical Chemistry C

      Volume: 115 Pages: 15502-15508

    • DOI

      10.1021/jp204277g

    • Peer Reviewed
  • [Journal Article] Photoemission from valence bands of transition metal phthalocyenines2011

    • Author(s)
      M.H.Shang, et al.
    • Journal Title

      Journal of Electron Spectroscopy and Related Phenomena

      Volume: 184 Pages: 261-264

    • DOI

      10.1016/j.elspec.2010.10.006

    • Peer Reviewed
  • [Journal Article] Impact of structural imperfection on the energy level alignment in organic films2011

    • Author(s)
      T.Hosokai, et al.
    • Journal Title

      Physical Review B

      Volume: 106 Pages: 156102-1-4

    • DOI

      10.1103/PhysRevLett.106.156102

    • Peer Reviewed
  • [Journal Article] Impact of alkyl side chains at self-assembly, electronic structure and charge arrangement in sexithiophene thin films2011

    • Author(s)
      S.Duhm, et al.
    • Journal Title

      Organic Electronics

      Volume: 12 Pages: 903-910

    • DOI

      10.1016/j.orgel.2011.03.009

    • Peer Reviewed
  • [Journal Article] Interface Electronic Structure of Crownether-derivatives on Cu(111)2011

    • Author(s)
      H.Machida, et al.
    • Journal Title

      UVSOR Activity Report 2010

      Volume: 38 Pages: 71

  • [Journal Article] レーザ光同時照射によって可能になった有機半導体単結晶の価電子バンド構造研究2011

    • Author(s)
      中山泰生, ほか
    • Journal Title

      レーザ加工学会誌

      Volume: 18 Pages: 202-206

    • Peer Reviewed
  • [Presentation] Hole-Phonon Coupling of Solid Rubrene : Elucidating Hopping Transport by UPS2012

    • Author(s)
      S.Duhm, et al.
    • Organizer
      International Symposium on Electronic/Optic Functional Molecules (ISEOFM2012)
    • Place of Presentation
      上海
    • Year and Date
      2012-03-12
  • [Presentation] Adsorption Geometry and Electronic Structure of Crownether-Derivatives on Cu(111)2012

    • Author(s)
      S.Kera, et al.
    • Organizer
      ESRF User Meeting and Hard X-ray Photolectron Spectroscopy and Standing Waves Workshop
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2012-02-06
  • [Presentation] Impact of spontaneous structural imperfection on the energy level alignment2011

    • Author(s)
      S.Kera, et al.
    • Organizer
      The 6th Japan-Sweden Workshop on Advanced Spectroscopy of Organic Materials for Electronic Applications (ASOMEA-VI)
    • Place of Presentation
      加賀、石川
    • Year and Date
      2011-11-25
  • [Presentation] Charge reorganization energy and small polaron binding energy of rubrene thin films by UPS2011

    • Author(s)
      S.Duhm, et al.
    • Organizer
      The 6th Japan-Sweden Workshop on Advanced Spectroscopy of Organic Materials for Electronic Applications (ASOMEA-VI)
    • Place of Presentation
      加賀、石川
    • Year and Date
      2011-11-25
  • [Presentation]2011

    • Author(s)
      F.Bussolotti, et al.
    • Organizer
      The 6th Japan-Sweden Workshop on Advanced Spectroscopy of Organic Materials for Electronic Applications (ASOMEA-VI)
    • Place of Presentation
      加賀、石川
    • Year and Date
      2011-11-25
  • [Presentation] Electronic Structure of Thin-Film and Single Crystalline Phases of Rubrene2011

    • Author(s)
      S.Kera
    • Organizer
      BIT'S 1st Annual World Congress of Nano-S&T
    • Place of Presentation
      Dalian, China(招待講演)
    • Year and Date
      2011-10-23
  • [Presentation] Spin Configuration of Mn-Phthalocyanine2011

    • Author(s)
      S.Kera, et al.
    • Organizer
      MDF International Workshop : Open-shell Organic Molecules-Synthesis and Electronic Structure Freedom-
    • Place of Presentation
      大阪
    • Year and Date
      2011-10-17
  • [Presentation] Adsorption geometry and electronic structure of crownether-derivatives on Cu(111)2011

    • Author(s)
      S.Kera, et al.
    • Organizer
      The 6th edition of the international workshop on Electronic Structure and Processes at Molecular-Based Interfaces (ESPMI-VI)
    • Place of Presentation
      Karlsruher, Germany
    • Year and Date
      2011-09-25
  • [Presentation] Charge reorganization energy of rubrene thin films : a photoemission study2011

    • Author(s)
      S.Duhm, et al.
    • Organizer
      The 6th edition of the international workshop on Electronic Structure and Processes at Molecular-Based Interfaces (ESPMI-VI)
    • Place of Presentation
      Karlsruher, Germany
    • Year and Date
      2011-09-25
  • [Presentation] Assembling and Electronic structure of a N-Heteroacene Ultra Thin Film on HOPG2011

    • Author(s)
      Q.Xin, et al.
    • Organizer
      The 6th edition of the international workshop on Electronic Structure and Processes at Molecular-Based Interfaces (ESPMI-VI)
    • Place of Presentation
      Karlsruher, Germany
    • Year and Date
      2011-09-25
  • [Presentation] Influence of Molecular Dipole Moment on the Interface of a N-Heteroacene Thin Film on HOPG2011

    • Author(s)
      Q.Xin, et al.
    • Organizer
      The 6th International Conference on Functional Semiconductor Interfaces (ICFSI)
    • Place of Presentation
      Prach
    • Year and Date
      2011-07-03
  • [Presentation] Valence hole-vibration coupling and charge reorganization energy of rubrene thin films on HOPG2011

    • Author(s)
      S.Duhm, et al.
    • Organizer
      The 6th International Conference on Functional Semiconductor Interfaces (ICFSI)
    • Place of Presentation
      Prach
    • Year and Date
      2011-07-03
  • [Presentation] Spin Configuration of Mn-Phthalocyanine Characterized by Molecular Orbital Symmetry2011

    • Author(s)
      S.Kera, et al.
    • Organizer
      International Conference on Materials for Advanced Technologies (ICMAT2011)
    • Place of Presentation
      Singapore(招待講演)
    • Year and Date
      2011-06-28
  • [Presentation] Thickness Dependent Energy Level Alignment and Fermi Level Pinning Mechanism at Organic Donor-acceptor Interface2011

    • Author(s)
      H.Mao, et al.
    • Organizer
      International Conference on Materials for Advanced Technologies (ICMAT2011)
    • Place of Presentation
      Singapore
    • Year and Date
      2011-06-28
  • [Presentation] Studies of Chloroaluminum Phthalocyanine by Scanning Tunneling Microscopy2011

    • Author(s)
      Y.L.Huang, et al.
    • Organizer
      International Conference on Materials for Advanced Technologies (ICMAT2011)
    • Place of Presentation
      Singapore
    • Year and Date
      2011-06-28
  • [Presentation] Site-Specific Adsorption of Dipolar Phthalocyanine on Au (111) Surtace2011

    • Author(s)
      T.Niu, et al.
    • Organizer
      International Conference on Materials for Advanced Technologies (ICMAT2011)
    • Place of Presentation
      Singapore
    • Year and Date
      2011-06-28
  • [Presentation] Electronic Properties of Potassium Doped Pentacene Thin Film2011

    • Author(s)
      F.Bossurotti, et al.
    • Organizer
      International Conference on Materials for Advanced Technologies (ICMAT2011)
    • Place of Presentation
      Singapore
    • Year and Date
      2011-06-28
  • [Remarks]

    • URL

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

URL: 

Published: 2013-06-26  

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