| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 가을 (10/11 ~ 10/12, 창원컨벤션센터) |
| 권호 |
37권 2호 |
| 발표분야 |
Korea-Taiwan Joint Symposium on Optoelectronic Applications(분자전자 부문위원회) |
| 제목 |
Development of New Materials for Polymer Solar Cell Applications |
| 초록 |
Forced planarization by covalently fastening adjacent aromatic units in the polymer backbone strengthens the parallel p-orbital interactions to elongate effective conjugation length and facilitate electron delocalization, providing an effective way to reduce the band gap and enhances the intrinsic charge mobility. In this research, we have developed a new class of ladder-type dithienosilolo-carbazole (DTSC), dithienopyrrolo-carbazole (DTPC) and dithienocyclopenta-carbazole (DTCC) units in which two outer thiophene subunits are covalently fastened to the central 2,7-carbazole cores by silicon, nitrogen and carbon bridges, respectively. The heptacyclic multifused monomers were polymerized with the benzothiadiazole (BT) acceptor by palladium-catalyzed cross coupling to afford three alternating donor-acceptor copolymers PDTSCBT, PDTCCBT and PDTPCBT. In a similar manner, we also developed a poly(fluorenedicyclopentathiophene-alt-benzothiadiazole) (PFDCTBT), where the 3-positon of two outer thiophenes are covalently tied with the 3,6-position of central fluorene core by a carbon bridge. We will demonstrate that the bridged atoms and the side-chain modification play important roles in determining the molecular properties and device performance. The applications of these polymers in bulk-heterojunction solar cells will be presented. |
| 저자 |
Yen-Ju Cheng1, Chain-Shu Hsu2
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| 소속 |
1Department of Applied Chemistry, 2National Chiao Tung Univ. |
| 키워드 |
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| E-Mail |
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