Bulk heterojunction solar cells based on preformed polythiophene nanowires via solubility-induced crystallization
SCIE
SCOPUS
- Title
- Bulk heterojunction solar cells based on preformed polythiophene nanowires via solubility-induced crystallization
- Authors
- Kim, JH; Park, JH; Lee, JH; Kim, JS; Sim, M; Shim, C; Cho, K
- Date Issued
- 2010-01
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- Here, we report the preparation of well-controlled nanoscale morphologies in photoactive thin films. The fabrication of bulk heterojunction structures in blend films of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM) employed two steps to achieve first the in situ formation of self-organized P3HT nanowires using a marginal solvent, and second, phase separation via mild thermal annealing. Morphological changes in the active layers that had been spin-cast from a marginal solvent, with varying annealing temperatures, were systematically studied and compared to the morphologies of films spin-cast from a good solvent. The interpenetrating nanowire structure yielded power conversion efficiencies as high as 4.07% due to the enhanced charge transport. Hole and electron mobilities increased substantially to 1.6 x 10(-3) cm(2) V(-1) s(-1) and 1.4 x 10(-3) cm(2) V(-1) s(-1), respectively, due to the two step process of P3HT crystallization by nanowire formation and subsequent phase separation. Photovoltaic performances improved with increasing film thickness up to 300 nm as a result of the interpenetrating donor/acceptor network structure.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10925
- DOI
- 10.1039/C0JM00666A
- ISSN
- 0959-9428
- Article Type
- Article
- Citation
- JOURNAL OF MATERIALS CHEMISTRY, vol. 20, no. 35, page. 7398 - 7405, 2010-01
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