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2008 Fiscal Year Final Research Report

Search and Elucidation of Ferro-electric Nature of OrganicSemiconductors

Research Project

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Project/Area Number 18350093
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials/Devices
Research InstitutionChiba University

Principal Investigator

HISAO Ishii  Chiba University, 先進科学センター, 教授 (60232237)

Co-Investigator(Kenkyū-buntansha) NOGUCHI Yutaka  千葉大学, 先進科学センター, 助教 (20399538)
NAKAYAMA Yasuo  千葉大学, 先進科学センター, 特任教員 (30451751)
Project Period (FY) 2006 – 2008
KeywordsAlq3 / TPBi / 有機EL素子 / 配向分極 / 界面電荷 / キャリアブロッキング / 変位電流測定 / 巨大表面電位
Research Abstract

エレクトロニクス応用が行われている有機半導体材料の中には, 永久双極子を有する分子が少なくない. 本研究では, それらの分子が強誘電的な性質を示すかどうかを探索した. 有機EL材料を中心に探索したところ, 分極反転を生じるいわゆる強誘電性を示すものは見つからなかったが, Alq_3 やTPBi などの有機EL 材料群において, 分子の永久双極子が配向することにより焦電体的な性質が現れることを見いだした. さらに, 配向分極により界面に固定電荷が生じていること, および, それらの界面電荷はキャリアをブロックし, 有機EL 素子の特性を左右していることを見いだした. また, 併せて有機デバイスの電子構造を評価するため, " 絶縁体に対応できる"光電子収量分光測定法を開発した.

  • Research Products

    (36 results)

All 2008 2007 2006

All Journal Article (11 results) (of which Peer Reviewed: 11 results) Presentation (24 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Journal Article] Direct Observation of theElectronic States of Single Crystalline Rubrene under ambient condition by Photoelectron YieldSpectroscopy2008

    • Author(s)
      Yasuo Nakayama, Shinichi Machida, TakeoMinari, Kazuhito Tsukagoshi, Yutaka Noguchi,Hisao Ishii
    • Journal Title

      Applied Physics Letters 93

      Pages: 153306(3 頁)

    • Peer Reviewed
  • [Journal Article] Mechanism ofhole accumulation at a-NPD/Alq_3 interfacestudied by displacement current measurement2008

    • Author(s)
      Naoki Sato, Yutaka Noguchi, Yuya Tanaka,Yasuo Nakayama, Hisao Ishii
    • Journal Title

      Proceedings of SPIE, Organic Light EmittingMaterials and Devices XII 7051

      Pages: 70510S1-70511S7

    • Peer Reviewed
  • [Journal Article] Does giantsurface potential modify the performance ofAlq_3-based OLED? : Voltage shift and chargetraps induced by light irradiation2008

    • Author(s)
      Yutaka Noguchi, Naoki Sato, Yuya Tanaka,Yasuo Nakayama, Hisao Ishii
    • Journal Title

      Proceedings of SPIE, Organic Light Emitting Materials andDevices XII 7051

      Pages: 70510K1-70510K82

    • Peer Reviewed
  • [Journal Article] 光電子収量分光法の絶縁物への適用とルブレン薄膜酸化過程のその場観察への応用2008

    • Author(s)
      町田真一, 中山泰生, 石井久夫
    • Journal Title

      表面科学 29

      Pages: 543-549

    • Peer Reviewed
  • [Journal Article] Threshold voltage shift and formationof charge traps induced by light irradiation duringthe fabrication of organic light-emitting diodes2008

    • Author(s)
      Y. Noguchi, N. Sato, Y. Tanaka, Y. Nakayama, H. Ishii
    • Journal Title

      Applied Physics Letters 92

      Pages: 203306(3)

    • Peer Reviewed
  • [Journal Article] Does giantsurface potential modify the performance ofAlq_3-based OLED? : Voltage shift and chargetraps induced by light irradiation2008

    • Author(s)
      Y. Nakayama, S. Machida, D. Tsunami, Y.Kimura, M. Niwano, Y. Noguchi, H. Ishii
    • Journal Title

      Applied Physics Letters 92

      Pages: 153306(3)

    • Peer Reviewed
  • [Journal Article] Trap elimination and injection switching atorganic field effect transistor2007

    • Author(s)
      S. Ogawa, Y. Kimura, M. Niwano and H. Ishii
    • Journal Title

      Appl. Phys. Lett. 90

      Pages: 0335043

    • Peer Reviewed
  • [Journal Article] 光電子収量分光による有機エレクトロニクス材料・界面の電子構造評価2007

    • Author(s)
      石井久夫, 津波大介, 末永保, 佐藤信之, 木村康男, 庭野道夫
    • Journal Title

      表面科学 28巻

      Pages: 264-270

    • Peer Reviewed
  • [Journal Article] Atmospheric effect of air, N_2,O_2, and water vapor on the ionization energy oftitanyl phthalocyanine thin film studied byphotoemission yield spectroscopy2007

    • Author(s)
      M. Honda, K. Kanai, K. Komatsu, Y. Ouchi, H. Ishii, K. Seki
    • Journal Title

      Journal ofApplied Physics 102

      Pages: 103704(10)

    • Peer Reviewed
  • [Journal Article] Photo-induced doping of organic fieldeffect transistors studied by displacement currentmeasurement and infrared absorptionspectroscopy in the multiple internal reflectiongeometry2006

    • Author(s)
      S. Ogawa, T. Naijo, Y. Kimura, H. Ishii and M. Niwano
    • Journal Title

      Jpn. J. Appl. Phys. 45

      Pages: 530-533

    • Peer Reviewed
  • [Journal Article] Carrier injection characteristics of metal/Alq_3interface with a long chain alkane insertionlayer2006

    • Author(s)
      Naofumi Abiko, Keiji Sugi, Tamotsu Suenaga,Yasuo Kimura, Hisao Ishii, Michio Niwano
    • Journal Title

      Jpn. J. Appl. Phys. 45

      Pages: 442-446

    • Peer Reviewed
  • [Presentation] α-NPD/Alq_3型有機EL素子作製時の光照射がもたらす内部電位分布変化とトラップ生成2008

    • Author(s)
      佐藤直樹, 野口裕, 田中有弥, 中山泰生, 石井久夫
    • Organizer
      有機EL討論会第6回例会
    • Place of Presentation
      東京
    • Year and Date
      20080600
  • [Presentation] Electronic states of single-crystalline rubrene studied by photoemission measurement techniques2008

    • Author(s)
      Yasuo Nakayama, Shinichi Machida, TakeoMinari, Kazuhito Tsukagoshi, Akihiro Funakoshi,Naoki Ogawa, Yutaka Noguchi, Hisao Ishii
    • Organizer
      Workshop on Electrical and Electronic Properties in Crystalline Thin Films of Small Molecules
    • Place of Presentation
      Chiba
    • Year and Date
      2008-12-19
  • [Presentation] DDynamic behavior of carriers in pentacene MIS diode studied by displacement current measurement using triangular and trapezoidal wave scans2008

    • Author(s)
      Yuya Tanaka, Naoki Sato, Yasuo Nakayama, Yutaka Noguchi, Hisao Ishii
    • Organizer
      International Conference on Nano-Molecular Electronics (ICNME 2008)
    • Place of Presentation
      Kobe
    • Year and Date
      2008-12-16
  • [Presentation] Electronic Structures of Rubrene Single Crystal and its Interface Studied by Photoemission Yield Spectroscopy2008

    • Author(s)
      Shinichi Machida, Yasuo Nakayama, TakeoMinari, Kazuhito Tsukagoshi, Yutaka Noguchi, Hisao Ishii
    • Organizer
      MRS Fall Meeting
    • Place of Presentation
      Boston
    • Year and Date
      2008-12-03
  • [Presentation] Carrier Blocking Nature at α-NPD/Alq_3 Interface Studied by Displacement Current Measurement : Is Orientation Polarization of Alq_3 film an Origin of the Interface Charge2008

    • Author(s)
      Yutaka Noguchi, Naoki Sato, Yuya Tanaka, Yasuo Nakayama and Hisao Ishii
    • Organizer
      MRS Fall Meeting
    • Place of Presentation
      Boston
    • Year and Date
      2008-12-03
  • [Presentation] 有機EL素子のヘテロ界面における電荷蓄積過程2008

    • Author(s)
      野口裕, 佐藤直樹, 宮崎行正, 田中有弥, 中山泰生, 石井久夫
    • Organizer
      有機EL討論会第7回例会
    • Place of Presentation
      金沢
    • Year and Date
      2008-11-21
  • [Presentation] MoO_3 on F8BT界面電子構造の光電子分光および準安定励起原子電子分光による研究2008

    • Author(s)
      中山泰生, 森井克行, 町田真一, 細海俊介, 鈴木雄一郎, 解良聡, 上野信雄, 北川宏, 野口裕, 石井久夫
    • Organizer
      有機EL討論会第7回例会
    • Place of Presentation
      金沢
    • Year and Date
      2008-11-20
  • [Presentation] 光電子分光および準安定励起原子電子分光によるMoO_3/F8BT 界面電子状態評価2008

    • Author(s)
      中山泰生, 森井克行, 町田真一, 細海俊介, 鈴木雄一郎, 解良 聡, 上野信雄, 北川 宏, 野口 裕, 石井久夫
    • Organizer
      第28回表面科学学術講演会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2008-11-15
  • [Presentation] Electronic states of single-crystalline rubrene in the ambient condition studied by Photoelectron Yield Spectroscopy2008

    • Author(s)
      Yasuo Nakayama, Shinichi Machida, Takeo Minari, Kazuhito Tsukagoshi, Akihiro Funakoshi,Naoki Ogawa, Yutaka Noguchi, Hisao Ishii
    • Organizer
      The 5th International Symposium on Surface Science and Nanotechnology (ISSS-5)
    • Place of Presentation
      Tokyo
    • Year and Date
      2008-11-11
  • [Presentation] Electronic Structure of Rubrene Single Crystal and its Interfacial Barrier Height Studied by Photoelectron Yield Spectroscopy2008

    • Author(s)
      Shinichi Machida, Yasuo Nakayama, Takeo Minari, Kazuhito Tsukagoshi, Yutaka Noguchi, Hisao Ishii
    • Organizer
      The 5th International Symposium on Surface Science and Nanotechnology (ISSS-5)
    • Place of Presentation
      Tokyo
    • Year and Date
      2008-11-11
  • [Presentation] 変位電流評価法による有機MIS型デバイスのキャリア注入・蓄積・拡散過程の観測2008

    • Author(s)
      田中有弥, 佐藤直樹, 中山泰生, 野口裕, 石井久夫
    • Organizer
      第69回応用物理学会学術講演会
    • Place of Presentation
      中部大学
    • Year and Date
      2008-09-04
  • [Presentation] 光電子収量分光法による金属/ルブレン酸化物/ルブレン界面の電子状態評価2008

    • Author(s)
      町田真一, 中山泰生, 野口裕, 石井久夫
    • Organizer
      第69回応用物理学会学術講演会
    • Place of Presentation
      中部大学
    • Year and Date
      2008-09-03
  • [Presentation] 光電子分析によるF8BT-MoO3界面電子構造の観測2008

    • Author(s)
      中山泰生, 森井克行, 町田真一, 細海俊介, 解良聡, 上野信雄, 北川宏, 野口裕, 石井久夫
    • Organizer
      第69回応用物理学会学術講演会
    • Place of Presentation
      中部大学
    • Year and Date
      2008-09-03
  • [Presentation] 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---2008

    • Author(s)
      野口裕, 佐藤直樹, 田中有弥, 宮崎行正, 中山泰生, 石井久夫
    • Organizer
      第69回応用物理学会学術講演会
    • Place of Presentation
      中部大学
    • Year and Date
      2008-09-02
  • [Presentation] Mechanism of hole accumulation at α-NPD/Alq_3 interfacestudied by displacement current measurement2008

    • Author(s)
      Naoki Sato, Yuya Tanaka, Yasuo Nakayama, Yutaka Noguchi, Hisao Ishii
    • Organizer
      SPIE Optics + Photonics 2008
    • Place of Presentation
      San Diego
    • Year and Date
      2008-08-12
  • [Presentation] Does giantsurface potential modify the performance ofAlq_3-based OLED? : Voltage shift and chargetraps induced by light irradiation2008

    • Author(s)
      Yutaka Noguchi, Naoki Sato, Yuya Tanaka,Yasuo Nakayama, Hisao Ishii
    • Organizer
      SPIE Optics +Photonics 2008
    • Place of Presentation
      San Diego
    • Year and Date
      2008-08-11
  • [Presentation] Electronic Structure of Single Crystalline Rubrene studied by Charge-up-durable Photoelectron YieldSpectroscopy2008

    • Author(s)
      Yasuo Nakayama, Shinichi Machida, TakeoMinari, Kazuhito Tsukagoshi, Yutaka Noguchi, Hisao Ishii
    • Organizer
      The 4th International Workshopon Electronic Structure and Processes at Molecular-Based Interfaces (ESPMI IV)
    • Place of Presentation
      Princeton
    • Year and Date
      2008-06-14
  • [Presentation] Effect of Orientation Polarozation in Organic Semiconductor Film on Interfacial Properties : Giant Surface Potential Formation and its Effecton Carrier Blocking at Organic/Organic Interfaces2008

    • Author(s)
      Yutaka Noguchi, Naoki Sato, Yuya Tanaka, Yasuo Nakayama, Hisao Ishii
    • Organizer
      The 4th International Workshop on Electronic Structure and Processes at Molecular-Based Interfaces (ESPMI IV)
    • Place of Presentation
      Princeton
    • Year and Date
      2008-06-14
  • [Presentation] Alq_3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~2008

    • Author(s)
      野口裕, 佐藤直樹, 田中有弥, 中山泰生, 石井久夫
    • Organizer
      有機エレクトロニクス研究会
    • Place of Presentation
      東京
    • Year and Date
      2008-05-29
  • [Presentation] 変位電流評価法によるα-NPD/Alq_3界面の正孔蓄積機構の解明2008

    • Author(s)
      野口裕, 佐藤直樹, 田中有弥, 中山泰生, 石井久夫
    • Organizer
      第55回応用物理学関係連合講演会
    • Place of Presentation
      日本大学理工学部
    • Year and Date
      2008-03-29
  • [Presentation] α-NPD/Alq_3成膜時の光照射による有機EL素子内部の電位分布変化と電荷トラップの生成2008

    • Author(s)
      佐藤直樹, 野口裕, 田中有弥, 中山泰生, 石井久夫
    • Organizer
      第55回応用物理学関係連合講演会
    • Place of Presentation
      日本大学理工学部
    • Year and Date
      2008-03-29
  • [Presentation] 変位電流評価法によるα-NPD/Alq_3界面の蓄積電荷量の測定2007

    • Author(s)
      野口裕, 佐藤直樹, 田中有弥, 中山泰生, 石井久夫
    • Organizer
      有機EL討論会第5回例会
    • Place of Presentation
      九州大学
    • Year and Date
      2007-11-16
  • [Presentation] 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2007

    • Author(s)
      野口裕, 佐藤直樹, 田中有弥, 中山泰夫, 石井久夫
    • Organizer
      第68回応用物理学会学術講演会
    • Place of Presentation
      北海道工業大学
    • Year and Date
      2007-09-05
  • [Presentation] 光電子収量分光による有機-金属界面の電子構造評価2007

    • Author(s)
      石井久夫, 津波大介, 末永保, 佐藤信之, 木村康男, 庭野道夫
    • Organizer
      有機EL討論会第4回例会
    • Place of Presentation
      日本科学未来館
    • Year and Date
      2007-06-09
  • [Patent(Industrial Property Rights)] HYBRID DEVICES2007

    • Inventor(s)
      Norbert Koch, Berlin
    • Industrial Property Rights Holder
      Hisao Ishii, Sendai
    • Industrial Property Number
      US 7,268,364 B2
    • Acquisition Date
      2007-09-11
    • Overseas

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Published: 2010-06-10   Modified: 2016-04-21  

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