| 학회 |
한국고분자학회 |
| 학술대회 |
2016년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
41권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Controllable Polarity of Organic Field-Effect Transistors Based on Thienoisoindigo Copolymers |
| 초록 |
Recently, copolymers based on conjugated donor-acceptor (D-A) strategies have been widely developed as organic semiconductors owing to its low-bandgap for high-performance field-effect transistors (FETs). Among these D-A systems, a thienoisoindigo (TIIG) unit has been intensively reported as the acceptor unit. By implanting thiophene into indigo unit, the molecular planarity improved through S⋯O interactions and charge delocalization enhanced according to increment of π-conjugated units. In this work, we introduced two different centrosymmetric donor units into the TIIG polymer backbone to improve the interchain π-π stacking interaction. To further investigate the possible polarities of TIIG-based polymers, we fabricated OFET devices using aluminum (Al) contacts. The resulting ultra-low bandgap copolymers enhanced the coplanarity of the polymer, improved mobilities of the FETs and exhibited ambipolar transport behaviors. |
| 저자 |
김효은1, 장문정2, 김경식1, 양창덕2, 오준학2
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| 소속 |
1포항공과대, 2울산과학기술원 |
| 키워드 |
OFET; thienoisoindigo; polarity
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| E-Mail |
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