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The ZnO-modified TiO 2 electrode was prepared by adding Zn(CH 3 COO) 2 ·2H 2 O to the TiO 2 colloid during the sol-gel production process,and was used in dye-sensitized solar cells (DSCs).The open circuit voltage (V OC) and fill factor (ff) of the cells were improved significantly.The performances of the ZnO-modified TiO 2 electrode such as dark current,transient photocurrent,impedance,absorption spectra,and flat band potential (V fb) were investigated.It is found that the interface charge recombination impedance increases and V fb shifts about 200 mV toward the cathodic potential.The effect mechanism of ZnO modification on the performance of DSCs may be that ZnO occupies the surface states of the TiO 2 film.
The ZnO-modified TiO 2 electrode was prepared by adding Zn (CH 3 COO) 2 · 2H 2 O to the TiO 2 colloid during the sol-gel production process, and was used in dye-sensitized solar cells (DSCs). The open circuit voltage (V OC) and fill factor (ff) of the cells were more significantly. These performances of the ZnO-modified TiO 2 electrode such as dark current, transient photocurrent, impedance, absorption spectra, and flat band potential (V fb) were investigated. It was found that the interface charge recombination impedance increases and V fb shifts about 200 mV toward the cathodic potential. The effect mechanism of ZnO modification on the performance of DSCs may be that ZnO occupies the surface states of the TiO 2 film.