Local doping to organic semiconductors

2012 Fiscal Year Final Research Report

• Project/Area Number: 23656011
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Tohoku University
• Principal Investigator: SHIMOTANI Hidekazu 東北大学, 大学院・理学研究科, 准教授 (60418613)
• Project Period (FY): 2011 – 2012
• Keywords: 有機 / 分子エレクトロニクス

Research Abstract

Dependence on carrier concentration of carrier mobility and contact resistance of carrier injection from a metal electrode were measured for organic semiconductor single crystals. The carrier concentration was controlled by an electric double-layer transistor (EDLT)structure employing an ionic liquid as an electrolyte. The contact resistance from a gold electrode to the organic semiconductor firstly decreased by increasing the carrier concentration, and then increased by increasing the carrier concentration. The carrier concentration dependence of the contact resistance is inversely proportional to that of carrier mobility. This behavior is well explained by the diffusion-limited thermionic emission model.

Research Products

• [Journal Article] Ambipolar Organic Single-Crystal Transistors Based on Ion Gels (2012)
  • Author(s): Y. Yomogida、J. Pu、H. Shimotani、S.Ono、S. Hotta、Y. Iwasa、T. Takenobu
  • Journal Title: Advanced Materials Volume: 24巻 Pages: 4392-4397
  • DOI: DOI:10.1002/adma.201200655
  • Peer Reviewed
• [Journal Article] External electric field dependence of the structure of the electric double layer at an ionic liquid/Au interface (2012)
  • Author(s): R. Yamamoto, H. Morisaki, O. Sakata, H. Shimotani, H. T. Yuan, Y. Iwasa, T. Kimura, Y. Wakabayashi
  • Journal Title: Applied Physics Letters Volume: 101巻 Pages: 053122-1-3
  • DOI: DOI:10.1063/1.4742920
  • Peer Reviewed
• [Journal Article] Electric-field-induced superconductivity at 9.4 K in a layered transition metal disulphide MoS_2 (2012)
  • Author(s): K. Taniguchi, A. Matsumoto, H.Shimotani, H. Takagi
  • Journal Title: Applied Physics Letters Volume: 101巻 Pages: 042603-1-3
  • DOI: DOI:10.1063/1.4740268
  • Peer Reviewed
• [Journal Article] Tunable Spin-Orbit Interaction in Trilayer Graphene Exemplified in Electric-Double-Layer Transistors (2012)
  • Author(s): Z. Chen, H. T. Yuan, Y Zhang, K. Nomura,T. Gao, Y. Gao, H. Shimotani, Z. F. Liu, Y. Iwasa
  • Journal Title: Nano Letters Volume: 12巻 Pages: 2212-2216
  • DOI: DOI:10.1021/nl204012c
  • Peer Reviewed
• [Journal Article] Strain-Mediated Phase Control and Electrolyte-Gating of Electron-Doped Manganites (2011)
  • Author(s): P. H. Xiang, S. Asanuma, H. Yamada, I.H. Inoue, H. Sato, H. Akoh, A. Sawa, K. Ueno, H. T. Yuan, H. Shimotani, M. Kawasaki, Y. Iwasa
  • Journal Title: Advanced Materials Volume: 23巻 Pages: 5822-5827
  • DOI: DOI:10.1002/adma.201102968
  • Peer Reviewed
• [Journal Article] Molecular thermal contraction of the Ar@C_<60> endohedral fullerene (2011)
  • Author(s): N. Dragoe, A. M. Flank, P. Lagarde, S.Ito, H. Shimotani, H. Takagi
  • Journal Title: Physical Review B Volume: 84巻 Pages: 155448
  • DOI: DOI:10.1103/PhysRevB.84.155448
  • Peer Reviewed
• [Journal Article] Accessing the transport properties of graphene and its multilayers at high carrier density (2011)
  • Author(s): J. T. Ye、M. F. Craciun、M. Koshino、S. Russo、S. Inoue、H. T. Yuan、H. Shimotani、A. F. Morpurgo、Y. Iwasa
  • Journal Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 108巻 Pages: 13002-13006
  • DOI: DOI:10.1073/pnas.1018388108
  • Peer Reviewed
• [Journal Article] Hole reduction and electron accumulation in YBa_2Cu_3O_y thin films using an electrochemical technique: Evidence for an n-type metallic state (2011)
  • Author(s): T. Nojima, H. Tada, S. Nakamura, N.Kobayashi, H. Shimotani, Y. Iwasa
  • Journal Title: Physical Review B Volume: 84巻 Pages: 020502
  • DOI: DOI:10.1103/PhysRevB.84.020502
  • Peer Reviewed
• [Journal Article] Liquid-Gated Ambipolar Transport in Ultrathin Films of a Topological Insulator Bi_2Te_3 (2011)
  • Author(s): H. T. Yuan, H. W. Liu, H. Shimotani, H. Guo, M. W. Chen, Q. K. Xue, Y. Iwasa
  • Journal Title: Nano Letters Volume: 11巻 Pages: 2601-2605
  • DOI: DOI:10.1021/nl201561u
  • Peer Reviewed
• [Presentation] Continuous Carrier Tuning in Metallic and Semiconducting SWNT Film (2012)
  • Author(s): Hidekazu Shimotani, Satoshi Tsuda, Hongtao Yuan, Yohei Yomogida, Rieko Moriya, Taishi Takenobu, Kazuhiro Yanagi, Yoshihiro Iwasa
  • Organizer: Japan-France Seminar : Physics and Control of Clustering Crystals
  • Place of Presentation: 淡路夢舞台国際会議場(淡路市)
  • Year and Date: 20121205-07
• [Presentation] EDLT of SWNT: single bundle and thin film (2012)
  • Author(s): Hidekazu Shimotani
  • Organizer: EDLT TOKYO
  • Place of Presentation: 東京大 学(東京)
  • Year and Date: 20120909-10
• [Presentation] 固液界面の強電場を利用したキャリア制御による電子相転移の発現 (2012)
  • Author(s): 下谷秀和
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大(兵庫県)
  • Year and Date: 20120324-27
• [Presentation] 電気二重層トランジスタによる金属・有機界面のキャリア注入機構の解明 (2012)
  • Author(s): 下谷秀和
  • Organizer: 特定領域研究「配列ナノ空間を利用した新物質科学ユビキタス元素戦略」配列ナノ空間研究会(第3回)
  • Place of Presentation: 東京工業大学(東京都)
  • Year and Date: 20120322-23
• [Presentation] One-dimensional nature in transport property of SWNT thin film electrochemical transistor (2012)
  • Author(s): Hidekazu Shimotani, Satoshi Tsuda, Hongtao Yuan, Yohei Yomogida, Rieko Moriya, Taishi Takenobu, Kazuhiro Yanagi, Yoshihiro Iwasa
  • Organizer: APS March Meeting 2012
  • Place of Presentation: ボストン(アメリカ)
  • Year and Date: 20120227-0302
• [Presentation] 金属・半導体分離単層カーボンナノチューブ薄膜の連続的キャリア濃度制御 (2012)
  • Author(s): 下谷秀和
  • Organizer: 特定領域研究「配列ナノ空間を利用した新物質科学ユビキタス元素戦略」第9回領域会議
  • Place of Presentation: 物質・材料研究機構(茨城県)
  • Year and Date: 20120106-07
• [Presentation] One-Dimensional Electronic Transport in Nanotube Random Network Transistors at Room Temperature (2011)
  • Author(s): Hidekazu Shimotani, Satoshi Tsuda, Hongtao Yuan, Yohei Yomogida, Rieko Moriya, Taishi Takenobu, Kazuhiro Yanagi, Yoshihiro Iwasa
  • Organizer: 2011 MRS Fall Meeting & Exhibit
  • Place of Presentation: Hynes Convention Center、ボストン(アメリカ)
  • Year and Date: 20111128-1202
• [Presentation] Continuous Carrier Tuning in Metallic and Semiconducting SWNT Film (2011)
  • Author(s): 下谷秀和
  • Organizer: 特定領域研究「配列ナノ空間を利用した新物質科学」若手研究会
  • Place of Presentation: 東北大学北青葉山キャンパス(宮城県)
  • Year and Date: 20110715-16
• [Presentation] 金属・半導体分離単層カーボンナノチューブ薄膜の連続的キャリア濃度制御 (2011)
  • Author(s): 下谷秀和
  • Organizer: 第5回物性科学領域横断研究会
  • Place of Presentation: 東北大学(宮城県)
  • Year and Date: 2011-11-20
• [Presentation] 金属・半導体分離SWNT薄膜の1次元的伝導特性 (2011)
  • Author(s): 下谷秀和,津田諭,袁洪涛,蓬田陽平,守屋理恵子,竹延大志,柳和宏,岩佐義宏
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2011-09-21