| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 가을 (10/11 ~ 10/12, 창원컨벤션센터) |
| 권호 |
37권 2호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Photovoltaic Efficiency Enhancement by the Generation of Embedded Silica Passivation Layer along the P3HT/PCBM Interface Using an Asymmetric Block Copolymer Additive |
| 초록 |
We report a novel concept enabling the generation of an embedded passivation layer along the 3-dimensionally intertwined interfaces between the nanoscopic domains of P3HT and PCBM in the polymer bulk hetero-junction solar cells. We used an asymmetric block copolymer of a P3HT block and a short tail. The tail blocks are segregated in the interfacial region of nanoscopic donor/acceptor domains and thermally transformed to a layer containing silica-like residues of sub-nanometer thickness. The additional interfacial thin layer generated in this way was shown to act perfectly as a block layer effectively depressing the recombination of charge carriers, affording 50~100 % enhancement of the power conversion efficiency over he devices without the copolymer. (Acknowledgement: This work was supported by the Basic Science Research Program [2010-0000282 and 2011-0027629] through the NRF of Korea funded by the MEST and the Program for Integrated Molecular System at GIST, Korea.) |
| 저자 |
한민구1, 김형수1, 서형탁2, Biwu Ma3, 박지웅1
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| 소속 |
1광주과학기술원, 2아주대, 3Lawrence berkeley national laboratory |
| 키워드 |
Photovoltaics; Self-assembly; Block copolymer; Additives
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| E-Mail |
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