Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 22, Issue -, Pages 49-52Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2012.05.027
Keywords
PEC solar cells; BiVO4; Dye-free; Ultra-fast transient absorption; Photo-generated carrier lifetime
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Funding
- National Natural Science Foundation of China [50902068, 11174129, 51102132, 61108001]
- National Basic Research Program of China [2011CB933303]
- Jiangsu Provincial Science and Technology Research Program [BK2011056]
- Fundamental Research Funds for the Central Universities [1116020406]
- Scientific Research Foundation of Graduate School of Nanjing University
- [NCET-09-0467]
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A dye-free photoelectrochemical (PEC) solar cell based on BiVO4 oxide film was developed. Without a bias, a high incident photo-to-current conversion efficiency (IPCE) of 43% was obtained and the solar energy conversion efficiency of the cell was 14 times higher than the record efficiency of Fe2O3 PEC solar cells. Ultra-fast transient absorption spectroscopy was utilized to investigate the mechanism of the different photoelectric performances. The results revealed that there was a longer lifetime of photogenerated carriers in BiVO4 than that in Fe2O3. It was helpful to develop other suitable photoelectrode materials for dye-free PEC solar cells. (C) 2012 Elsevier B.V. All rights reserved.
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