| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 |
19권 1호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Conformation-Insensitive Ambipolar Charge Transport in a DPP-Based Co-polymer Containing Acetylene Linkages |
| 초록 |
A new donor−acceptor organic semiconducting co-polymer (PDPP-TAT) containing acetylene linkages based on dithienyl-diketopyrrolopyrrole (tDPP) has been synthesized and compared with a tDPP-based co-polymer (PDPPTVT) containing vinylene linkages. The sp-hybridized carbons in the acetylene linkages result in favorable overlap of the electron wave functions of the tDPP units along the main chain. Further, the π-conjugation of PDPP-TAT was found to be highly insensitive to the chain conformation, in contrast to that of PDPP-TVT. As a result, PDPP-TAT provides favorable charge transport for electrons as well as holes, and enables facile charge transport in amorphous and 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 μe/μh value that is a factor of 30 lower. Our results demonstrate that the conformation sensitivity of charge transport is a vital factor in the electrical performances of actual organic transistor devices. |
| 저자 |
윤희준1, 최현호2, 이지상1, 천예림1, 하연희1, 조길원2, 김윤희1
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| 소속 |
1경상대, 2POSTECH CASE |
| 키워드 |
OTFT; DPP; ambipolar; transistor
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| E-Mail |
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