| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 가을 (10/11 ~ 10/12, 창원컨벤션센터) |
| 권호 |
37권 2호 |
| 발표분야 |
고분자 나노복합체 기반 에너지 하베스팅/저장 기술 |
| 제목 |
Rational Design and Development of Conjugated Polymers for High Performance Organic Solar Cells |
| 초록 |
We developed a series of conjugated polymers with a backbone of thieno[3,4-b]thiophene-co-benzo[1,2-b:4,5-b’]dithiophene (TT-co-BDT) moieties and studied the effect of the polymer structure on photovoltaic properties. We demonstrated that fluorination of the polymer backbone affected the energy levels, the microstructures of polymer/fullerene blend films, and the intramolecular exciton splitting dynamics of the polymers, resulting in power conversion efficiencies (PCEs) of 2.3~7.2%. To further enhance the PCE, we synthesized copolymers with a backbone of thieno[3,4-b]thiophene-co-dithieno[2,3-d:2’,3’-d’]benzo[1,2-b:4,5-b’]dithiophene (TT-co-DBD). Introduction of an extended conjugation system such as DBD into the polymer facilitates the delocalization of holes in the polymer formed after exciton-splitting, which improved exciton-splitting efficiency. As a result, solar cells made from the TT-co-DBD polymers showed a higher PCE of 7.7% than the TT-co-BDT polymers. |
| 저자 |
Hae Jung Son1, Bridget Carsten1, Luyao Lu1, Brian S. Rolczynski2, Jodi M. Szarko2, Lin X. Chen2, Luping Yu1
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| 소속 |
1The Univ. of Chicago, 2Northwestern Univ./Argonne National Laboratory |
| 키워드 |
Polymer; Organic Solar Cell; Solar Energy Harvesting
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| E-Mail |
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