The effects of electronic structure of non-metallic doped TiO2 anode and co-sensitization on the performance of dye-sensitized solar cells
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N/TiO2, S/TiO2, and N S/TiO2 nanocrystalline films anode were obtained by doping non-metallic element N and S which could change the LUMO of anode, leading to the easy injection of electron from the excited state of dye molecule to the conduction band of semiconductor, and thus improving the photoelectric conversion efficiency and reducing the impedance of solar cells. The anode films treated by titanium tetrachloride and co-sensitized by P3HT/N719 were also studied. The absorption region of P3HT/N719 covered the entire visible region in the solar cells. The solar cell based on N/TiO2 anode film treated by titanium tetrachloride and P3HT/N719 showed a short-circuit current density of 10.20 mA/cm2, open-circuit voltage of 0.557 V, and photoelectric conversion efficiency of 2.55%.
KeywordsTiO2 Solar Cell Electrochemical Impedance Spectroscopy TiO2 Film Anode Film
The study was supported by the Key Planned Science and Technology Project of Hainan Province (ZDXM 20100062), the National High Technology Research and Development Program of Hainan under Grant no. 509013, the National High Technology Research and Development Program of China (863 Program) under Grant no. 2006AA03z412, the Scientific Research Project of Hainan Education Department under Grant no. Hj 2010-52, and the Scientific Research Foundation of Graduate School of Beijing University of Chemical and Technology (no. 09Si005).