2014 Fiscal Year Annual Research Report
印刷できるＬＳＩ用有機単結晶半導体トランジスタの物理モデル開発
| Project/Area Number |
14F04777
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| Research Institution | The University of Tokyo |
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Principal Investigator |
竹谷 純一 東京大学, 新領域創成科学研究科, 教授 (20371289)
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| Co-Investigator(Kenkyū-buntansha) |
HAEUSERMANN Roger 東京大学, 新領域創成科学研究科, 外国人特別研究員
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| Project Period (FY) |
2014-04-25 – 2016-03-31
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| Keywords | 有機エレクトロニクス / 半導体 / フレキシブルエレクトロニクス / 集積回路 / 電界効果トランジスタ / 接触抵抗 / 電荷注入 / 電気特性変動シミュレーション |
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| Outline of Annual Research Achievements |
Understanding the processes governing the injection of charge carriers from the metal into the organic semiconductor is crucial for improving organic semiconductor devices.In my research we built organic single-crystalline field-effect transistor. Single-crystal organic semiconductors are becoming the standard for research and applications. Therefore, it is vital to investigate the charge injection into these single crystals.
We built over 2 dozen transistors. Depending on the details of the processing conditions, we observed 3 distinguished features in the injection characteristics. Thanks to careful analysis in combination with a self developed numerical simulator we could trace the origin of some of these effects.
We could show, that a widely observed reduction of the contact resistance is due to filling of defects in the contact region. This is a first evidence of the direct influence of defects on the contact resistance.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
As planned, we managed to measure and analyze how the charge injection is influenced by external parameters. We implemented some of the found parameters into a comprehensive as well as a simplified simulation model, which lead to a deeper understanding of the contact region.
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| Strategy for Future Research Activity |
I am in preparation of a manuscript describing the influence of defect states on charge injection and in parallel analyzing more data leading to an additional publication. We plan to present these findings at two international conferences, one in Japan and one in the USA. To intensify this research, we are in discussion with an industrial partner to start a collaboration.
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