期刊
CHEMPHYSCHEM
卷 15, 期 6, 页码 1201-1206出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201301025
关键词
electron transfer; energy conversion; photochemistry; ruthenium; sensitizers
资金
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [25810043]
- Grants-in-Aid for Scientific Research [25810043] Funding Source: KAKEN
Dependence of the suppression of the backward electron transfer reaction from the TiO2 photoelectrode to I-3(-) in the electrolyte on the alkyl chain length of the quaternary ammonium cation has been investigated for further efficiency improvement of high-performance cosensitized dye-sensitized solar cells (DSCs). The tetraheptylammonium cation was found to be more effective than the tetraethylammonium and tetrabutylammonium cations for the suppression of the backward electron transfer reaction without changing the conduction band energy of TiO2. 12.0% conversion efficiency, which is the second highest efficiency for DSCs based on ruthenium sensitizers, was achieved in the cosensitized DSC with Black dye and D131 by using an electrolyte solution containing a moderate concentration of tetraheptylammonium iodide.
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