| 학회 |
한국고분자학회 |
| 학술대회 |
2010년 가을 (10/07 ~ 10/08, 대구 EXCO) |
| 권호 |
35권 2호 |
| 발표분야 |
분자전자소재 및 소자 |
| 제목 |
Bias stress induced instability of solution processed organic thin film transistor employing self-assembled semiconductor / polymer blend |
| 초록 |
A possible solution for TIPS-pentacene based TFTs to be highly-performing hysteresis-free devices with improved uniformity is suggested by blending TIPS-pentacene and insulating poly-(methyl methacrylate) (PMMA). We introduces “vertical flowing” technique of blend solution. We demonstrate hysteresis-free TFT on glass substrate, which exhibit mobility of 0.34 ± 0.03 cm2/ V s operating at -15 V. Finally, we report on the bias stress effect of organic thin-film transistor. Positive gate bias leads to a positive shift in the threshold voltage, while the transfer curve moves to negative against negative stress. The reference TFT shows vulnerable behavior (Vth＜ 3 V) to negative bias stress while robust (Vth ＜ 0.5 V) to positive bias one under stress time of up to 5000 s. The time evolution of threshold voltage is described by the stretched-exponential equation in conjunction with the time dependent analysis of subthreshold slope. |
| 저자 |
박지훈, 이광현, 박찬호, 이경하, 임성일
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| 소속 |
연세대 |
| 키워드 |
organic transistor; bias stress; blend; solution process
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| E-Mail |
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