| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Molecular Design Strategy for Ambipolar Charge Transport in Fluorinated Conjugated Polymers for High Performance Organic Field-Effect Transistors |
| 초록 |
We report a new molecular design for highly balanced charge transport for donor-acceptor (D-A) copolymer by fluorine substitution on donor unit (T2). Two IIG-based copolymers (PIIG-iFT2 and PIIG-oFT2) containing two fluorine atoms are synthesized at the T2 inner and outer site to investigate the effects of fluorine substitution position on structural and electronic property. Fluorination at the outer site of T2 in PIIG-oFT2 polymer effectively lower molecular energy levels and improve molecular planarity more than PIIG-iFT2. PIIG-oFT2-based organic field-effect transistors exhibit balanced mobility ratio (i.e. hole mobility (μh)/electron mobility (μe) = 1) by increasing electron mobility whereas PIIG-T2 (μh/μe = 9.0) and PIIG-iFT2 (μh/μe = 2.4) exhibit unbalanced transport. The ambipolar complementary-like inverter was also fabricated by simple one time coating of PIIG-oFT2 with gain = 21. |
| 저자 |
박상아, 이준우, 최경원, 류승운, 정다솔, 박태호
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| 소속 |
POSTECH |
| 키워드 |
Semiconducting polymer; organic field-effect transistor; ambipolar charge transport
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| E-Mail |
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