2021 Fiscal Year Final Research Report
Efficient carrier transport and stable operation of organic thin-film transistors based on molecular layer-controlling technique
Project/Area Number |
19H02579
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 29010:Applied physical properties-related
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Research Institution | The University of Tokyo |
Principal Investigator |
Arai Shunto 東京大学, 大学院工学系研究科(工学部), 講師 (40750980)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 自己組織化 / 結晶構造制御 / 界面制御 / プリンテッドエレクトロニクス / 有機半導体 |
Outline of Final Research Achievements |
In this research project, we successfully manufactured high-performance organic thin-film transistors (TFTs) based on our original methodology for fabricating single-crystal thin films of organic semiconductors (OSCs) with homogeneous thickness. In this technique, we utilized layered OSCs composed of a π-electron framework (π-core) and an alkyl chain. We investigated that the intralayer molecular packing of the OSC layer, responsible for carrier transport, is predetermined by the competition and balance between the intermolecular core-core and chain-chain interactions. Based on the findings, we developed new OSCs with excellent layered crystallinity and thermal stability. We also invented a technique to produce a uniform semiconductor layer on a surface of a highly lyophobic insulating layer. This technique enables to obtain TFTs showing extremely sharp on/off switching. These findings have made it possible to achieve both efficient carrier transport and stable device operation.
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Free Research Field |
ソフトマター物理、プリンテッドエレクトロニクス
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Academic Significance and Societal Importance of the Research Achievements |
本研究課題では、有機分子ならではの分子構造の自由度を活用した塗布製膜法を活用することで、有機電子材料の可能性を引き出し、きわめて急峻なスイッチングを示す有機トランジスタの作製に成功した。こうしたデバイス製造手法や有機電子材料の設計指針は今後の有機エレクトロニクスの基盤になるものと期待される。また、こうした有機電子材料の開発が進展することで、既存のデバイス製造技術では対応が難しい軽量・フレキシブルといった特徴を兼ね備えたデバイスの開発・普及につながることが期待される。
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