A new anode material of silver photo-deposition on TiO_2 in DSSC

摘要

A series of nano-scaled Ag/TiO_2 anode was prepared by photo deposition method with different light time. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) confirmed that Ag deposited on TiO_2 surface mainly in zero valent successfully. Electrochemical Impedance Spectroscopy (EIS) measurements showed that the R_(ct2) corresponding to the TiO_2/dye/electrolyte interface decreased 10.4 Ω. Deposition of Ag on TiO_2 surface can transmit the carriers produced by photo excited dye better than pure TiO_2. This improved the electrons transmission efficiency of anode. Therefore, the photoelectric conversion efficiency of dye-sensitized solar cell (DSSC) was improved. There is an optimum light time. That is the 10 min measured by experiment.