| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Control of Ambipolar Charge Transport by Changing Fluorine Substitution Position in Isoindigo-based Conjugated Polymers for High Performance Organic Field-Effect Transistors |
| 초록 |
We report a new molecular design to achieve highly balanced charge transport for donor-acceptor (D-A) copolymer through fluorine substitution on bithiophene (T2). To study the effects of fluorine substitution site on structural and electronic property, we synthesize two IIG-based copolymers (PIIG-iFT2 and PIIG-oFT2), which contain two fluorine atoms at the T2 inner and outer site. Fluorination at the outer site of T2 in PIIG-oFT2 polymer effectively lowered molecular energy levels and increased molecular planarity more than fluorination at the inner site of T2. PIIG-oFT2 organic field-effect transistors exhibited highly balanced mobility, hole mobility (uh)/electron mobility (ue) = 1 by increasing electron mobility whereas PIIG-T2 (uh/ue = 9.0) and PIIG-iFT2 (uh/ue = 2.4) exhibited unbalanced transport. The ambipolar complementary-like inverter was also fabricated by simple one time coating of PIIG-oFT2 with gain = 21. |
| 저자 |
박상아, 김민준, 박성진, 최예림, 민지현, 박태호
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| 소속 |
POSTECH |
| 키워드 |
Organic field-effect transistor; Ambipolar polymer; Fluorination; Isoindigo copolymer; Inverter
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| E-Mail |
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