| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 가을 (10/06 ~ 10/08, 제주 ICC) |
| 권호 |
39권 2호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Conformation-Insensitive Ambipolar Charge Transport in a DPP-Based Copolymer Containing Acetylene Linkages |
| 초록 |
A new organic semiconducting copolymer (PDPP-TAT) containing acetylene linkages based on diketopyrrolopyrrole (DPP) has been compared with a DPP-based copolymer (PDPP-TVT) containing vinylene linkages. The acetylene linkages result in favorable overlap of the electron wave-functions along main chain. Further, the π-conjugation of PDPP-TAT was found to be highly insensitive to the chain conformation. As a result, PDPP-TAT provides favorable charge transport for electrons as well as holes, and enables facile charge transport in tie-molecular regions connecting its crystalline domains. PDPP-TAT exhibits ambipolar characteristics with a high electron/hole mobility ratio (μe/μh) of ~0.3 in field-effect transistors, whereas PDPP-TVT exhibits unipolar characteristics with a value of μe/μh that is lower by a factor of 30. Our results demonstrate that the conformation sensitivity of charge transport is a vital factor in the electrical performances of actual organic transistor devices. |
| 저자 |
최현호1, 윤희준2, 권순기2, 김윤희2, 조길원1
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| 소속 |
1POSTECH, 2경상대 |
| 키워드 |
Organic transistor; Ambipolarity; Organic semiconductor; Diketopyrrolopyrrole; Acetylene; Chain conformation
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| E-Mail |
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