| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터) |
| 권호 |
43권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Solvent-vapor-annealed A–D–A-type semicrystalline conjugated small molecules for flexible ambipolar field-effect transistors |
| 초록 |
This paper reports a series of A–D–A type small molecules based on an oligothiophene–phenylene core with three different electron-accepting terminal groups—dicyanovinyl, cyano-rhodanine and cyano-indanone, respectively. Intrachain noncovalent coulombic interactions were incorporated into the design of the P3T4 backbone to enhance the chain planarity. All the P3T4-based OFETs performances were strongly dependent on the terminal groups. The P3T4-INCN OFET exhibited the highest carrier mobility owing to the extended ∏-conjugation via the INCN moiety, which enhanced the intermolecular cofacial ∏-∏ stacking and generated an efficient carrier pathway in the transistor channel. The effects of both the terminal groups of the small molecules and solvent vapor annealing were systematically investigated by UV-vis, 2GIXD, and AFM. These OFETs exhibited a hole mobility of 0.15 cm2/Vs, an electron mobility of 0.05 cm2/Vs, and excellent mechanical stability even after 300 bending cycles. |
| 저자 |
김민제1, 이영웅2, 이유정2, 우한영2, 조정호1
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| 소속 |
1성균관대, 2고려대 |
| 키워드 |
organic semiconductor; charge mobility; organic field-effect transistor (OFET); solvent vapor annealing; ambipolar
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| E-Mail |
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