有機半導体π電子系の3次元電界効果トランジスタ

• Project Area: Emergence of highly elaborated pai-space and its function
• Project/Area Number: 21108514
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Osaka University
• Principal Investigator: 竹谷 純一 大阪大学, 産業科学研究所, 教授 (20371289)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 分子性固体 / 有機半導体 / 表面・界面物性 / 合成化学 / 電子デバイス / 有機トランジスタ / 電子輸送特性 / 有機単結晶トランジスタ

Research Abstract

21年度は、集積型立体構造に微小有機半導体単結晶キャリア伝導チャンネルを構成する手法の開発に取り組み、MEMS技術を用いたシリコン基板やプラスティック材料の立体構造を作製する手法の開発を進めた。それまでの、十ミクロンスケールの縦型マルチチャンネルを有する多結晶薄膜トランジスタの動作に成功したプロセスを発展させて、スケールダウンするとともに欠陥の少ない高品質の単結晶を構造上に成長する方法を工夫した。22年度には、こうして得られた三次元構造を用いて、「三次元有機トランジスタ」や領域内共同研究による「金微粒子と有機単結晶薄膜の室温塗布による高性能有機トランジスタの開発」を行った。
「三次元有機トランジスタ」では、単結晶の有機トランジスタと組み合わせてMHz級のデバイス応答を実現した。この結果は、論理回路素子への展開が可能なほどに高性能な有機トランジスタ開発1のベースとなる(Appl.Phys.Lett.??)。「金微粒子と有機単結晶薄膜の室温塗布による高性能有機トランジスタの開発」は、領域内の筑波大学金原氏との共同研究である。同氏が開発した、室温塗布プロセスのみによって低抵抗の金属伝導が実現する金微粒子を用いて、インクジェット装置による塗布プロセスを開発した。金微粒子の分散液が親水性であって、疎水性の有機半導体表面には通常の方法で塗布することが難しいために、ここでも立体構造を用いて濡れ性を制御する手法によって、有機半導体との密着性を高めた。その結果、研究代表者の有する高性能有機単結晶薄膜と組み合わせて、塗布のみによる高性能有機トランジスタを実現できた。

Research Products

• [Journal Article] Patternable Solution-Crystallized Organic Transistors with High Charge Carrier Mobility (2011)
  • Author(s): K.Nakayama, J.Takeya, et al.
  • Journal Title: Advanced Materials(Early View)
  • Peer Reviewed
• [Journal Article] Optical pump-probe spectroscopy of photocarriers in rubrene single crystals (2011)
  • Author(s): S.Tao, J.Takeya, et al.
  • Journal Title: Physical Review B Volume: 83
  • Peer Reviewed
• [Journal Article] Linear- and Angular-Shaped Naphthodithiophenes : Selective Synthesis, Properties, and Application to Organic Field-Effect Transistors (2011)
  • Author(s): S.Shinamura, J.Takeya, et al.
  • Journal Title: Journal of The American Chemical Society Volume: in press
  • Peer Reviewed
• [Journal Article] Low-temperature thermal conductivity of bulk and film-like rubrene single crystals (2011)
  • Author(s): Y.Okada, J.Takeya, et al.
  • Journal Title: Physical Review B Volume: 83
  • Peer Reviewed
• [Journal Article] Low-voltage operation of n-type organic field-effect transistors with ionic liquid (2010)
  • Author(s): T.Uemura, et al.
  • Journal Title: Jap.J.Appl.Phys. 49
  • Peer Reviewed
• [Journal Article] Air-stable n-channel single-crystal field-effect transistors (2010)
  • Author(s): M.Yamagishi, et al.
  • Journal Title: Jap.J.Appl.Phys. 49
  • Peer Reviewed
• [Journal Article] Growth of thin rubrene single crystals from 1-propanol solvent (2010)
  • Author(s): T.Matsukawa, et al.
  • Journal Title: J.Cryst.Growth 312 Pages: 310-313
  • Peer Reviewed
• [Journal Article] Charge-transfer induced surface conductivity for a copper based inorganic-organic hybrid (2009)
  • Author(s): A.H.Arkenbout, et al.
  • Journal Title: Appl.Phys.Lett. 95
  • Peer Reviewed
• [Journal Article] Very high mobility in solution-processed organic thin-film transistors of highly ordered [1]Benzothieno[3,2-b]benzothiophene derivatives (2009)
  • Author(s): T.Uemura, et al.
  • Journal Title: Appl.Phys.Exp. 2
  • Peer Reviewed
• [Journal Article] High-performance organic field-effect transistors with binary ionic liquids (2009)
  • Author(s): S.Ono, et al.
  • Journal Title: Org.Electron. 10 Pages: 1579-1582
  • Peer Reviewed
• [Journal Article] Reduced contact resistances in organic transistors with secondary gates on source and drain electrodes (2009)
  • Author(s): K.Nakayama, et al.
  • Journal Title: Appl.Phys.Lett. 95
  • Peer Reviewed
• [Journal Article] Low-voltage operation of n-type organic field-effect transistors with ionic liquid (2009)
  • Author(s): T.Uemura, et al.
  • Journal Title: Appl.Phys.Lett. 95
  • Peer Reviewed
• [Journal Article] Comprehensive evaluation of electron mobility for trifluoroacetyl-terminated electronegative conjugated oligomer (2009)
  • Author(s): Y.Ie, et al.
  • Journal Title: J.Phys.Chem.C 113 Pages: 17189-17193
  • Peer Reviewed
• [Journal Article] Direct observation of lanthanide(III)-phthalocyanine molecules on Au(111) by using scanning tunneling microscopy and scanning tunneling spectroscopy and thin-film field-effect transistor properties of Tb(III)-and Dy(III)-phthalocyanine molecules (2009)
  • Author(s): K.Katoh, et al.
  • Journal Title: J.Am.Chem.Soc. 131 Pages: 9967-9970
  • Peer Reviewed
• [Journal Article] Organic field-effect transistors using single crystals (2009)
  • Author(s): T.Hasegawa, et al.
  • Journal Title: Sci.Technol.Adv.Mater. 10
  • Peer Reviewed
• [Journal Article] Moderately anisotropic field-effect mobility in dinaphtho[2,3-b:2',3'-f]thiopheno[3,2-b]thiophenes single-crystal transistors (2009)
  • Author(s): M.Uno, et al.
  • Journal Title: Appl.Phys.Lett. 94
  • Peer Reviewed
• [Journal Article] Three-dimensional organic field-effect transistors with high output current and high on-off ratio (2009)
  • Author(s): M.Uno, et al.
  • Journal Title: Appl.Phys.Lett. 94
  • Peer Reviewed
• [Presentation] Hall Effect and Charge Transport Mechanism in High-mobility Organic Transistors (2010)
  • Author(s): J.Takeya
  • Organizer: 2010 MRS Fall Meeting
  • Place of Presentation: Sheraton Boston Hotel, Massachusetts(USA)
  • Year and Date: 2010-12-03
• [Presentation] 有機電界効果トランジスタにおけるホール効果測定 (2010)
  • Author(s): 植村隆文, 竹谷純一
  • Organizer: 日本物理学会 2010年秋
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2010-09-23
• [Presentation] ジアルキルジナフトチエノチオフェンの高移動度塗布型OFETs (2010)
  • Author(s): 植村隆文, 竹谷純一
  • Organizer: 2010年秋季 第71回応用物理学会学術講演会
  • Place of Presentation: 長崎大学文教キャンパス
  • Year and Date: 2010-09-15
• [Presentation] Electric field-effect in solution-crystallized organic semiconductors (2010)
  • Author(s): J.Takeya
  • Organizer: 2010 MRS Spring Meeting
  • Place of Presentation: Moscone West and San Francisco Marriott(USA)(Invite)
  • Year and Date: 2010-04-08
• [Presentation] Three-dimensional Organic Field-effect Transistors (2009)
  • Author(s): M.Uno
  • Organizer: The 16th International Display Workshop (IDW '09)
  • Place of Presentation: Miyazaki International Conference Hall, Phonenix Seagia Resort, Miyazaki
  • Year and Date: 2009-12-09
• [Presentation] Three-dimensional organic field-effect transistors on plastic substrates : flexible transistors with very high output current (2009)
  • Author(s): J.Takeya, M.Uno, et al.
  • Organizer: Matereial Research Society, Fall Meeting
  • Place of Presentation: Boston, Massachusetts (U.S.A.)
  • Year and Date: 2009-12-03
• [Presentation] Hall effect in polycrystal and single-crystal organic FETs (2009)
  • Author(s): J.Takeya
  • Organizer: Global COE Workshop on "Organic Electronics : Electronic States, Charge Transport and Devices"
  • Place of Presentation: Chiba University, Chiba, Japan
  • Year and Date: 2009-11-06
• [Presentation] Hall effect in field-effect transistors of thin-film and single-crystal organic semiconductors (2009)
  • Author(s): J.Takeya
  • Organizer: ISSP Workshop on physics and new phenomena of pi-electronic interfaces
  • Place of Presentation: ISSP(東大物性研)Kashiwa, Chiba
  • Year and Date: 2009-08-11
• [Presentation] Charge transport in field-effect transistors of organic semiconductor single crystals (2009)
  • Author(s): J.Takeya
  • Organizer: International Conference on Materials for Advanced Technologies
  • Place of Presentation: Singapore (Singapore)
  • Year and Date: 2009-06-29
• [Presentation] Gating conductance of metal-organic semiconductor contacts : a macro-scale device reflecting molecular-scale switching (2009)
  • Author(s): J.Takeya, K.Nakayama, T.Uemura, M.Yamagishi, M.Uno
  • Organizer: Matereial Research Society, spring Meeting
  • Place of Presentation: San Francisco, CA (U.S.A.)
  • Year and Date: 2009-04-15
• [Book] 有機デバイスの界面評価と制御技術 (2009)
  • Author(s): 竹谷純一, 他
  • Total Pages: 30
  • Publisher: シーエムシー出版
• [Patent(Industrial Property Rights)] 有機FETアレイ (2009)
  • Inventor(s): 竹谷純一
  • Industrial Property Rights Holder: JST
  • Industrial Property Number: 2009-268792
  • Filing Date: 2009-11-26
• [Patent(Industrial Property Rights)] 有機FETアレイ (2009)
  • Inventor(s): 竹谷純一
  • Industrial Property Rights Holder: 大阪大学
  • Industrial Property Number: 2009-205992
  • Filing Date: 2009-09-07
• [Patent(Industrial Property Rights)] 有機半導体膜の製造方法および有機半導体膜アレイ (2009)
  • Inventor(s): 竹谷純一
  • Industrial Property Rights Holder: 大阪大学
  • Industrial Property Number: 2009-230451
  • Filing Date: 2009-10-20