期刊
APPLIED PHYSICS LETTERS
卷 99, 期 19, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3660711
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资金
- National Natural Science Foundation of China [60876047, 60976054]
- Fundamental Research Funds for the Central Universities [WK2060140005]
Dye-sensitized solar cells (DSSCs) with TiO2 electrodes, which were modified to have different surface chemical states, were fabricated. The DSSCs had an ultra-flat TiO2 electrode, on which only a mono-layer dye was attached. The cell I-V measurement showed that Ti3+ ion had a dramatic effect on cell performance. The efficiency of a DSSC was shown to have a strong correlation with the concentration of the Ti3+ surface state, it decreased almost linearly with increased Ti3+ concentration. The oxygen vacancy-Ti3+ defect served as electron recombination center and decreased both the open-circuit voltage and the fill factor. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3660711]
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