期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 27, 页码 6933-6937出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201400723
关键词
aqueous electrolytes; cobalt redox couples; dye-sensitized solar cells; insulating monolayers; octadecyltrichlorosilane
资金
- Australian Research Council
- Australian Renewable Energy Agency
- Australian Solar Institute
- Victorian State Government Department of Primary Industry
- Bluescope Steel
- Innovia Films
- Innovia Security
- Bosch (Victorian Organic Solar Cells Consortium)
- Specialized Research Fund for the Doctoral Program of Higher Education (China) [20122302110043]
- State Key Laboratory of Urban Water Resource and Environment (HIT) [2013TS05]
- Joint Educational Ph.D. Program of Chinese Scholarship Council
A general and convenient strategy is proposed for enhancing photovoltaic performance of aqueous dye-sensitized solar cells (DSCs) through the surface modification of titania using an organic alkyl silane. Introduction of octadecyltrichlorosilane on the surface of dyed titania photoanode as an organic barrier layer leads to the efficient suppression of electron recombination with oxidized cobalt species by restricting access of the cobalt redox couple to the titania surface. The champion ODTS-treated aqueous DSCs (0.25 mm ODTS in hexane for 5 min) exhibit a V-oc of 821 +/- 4 mV and J(sc) of 10.17 +/- 0.21 mA cm(-2), yielding a record PCE of 5.64 +/- 0.10%. This surface treatment thus serves as a promising post-dye strategy for improving the photovoltaic performance of other aqueous DSCs.
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