Dye-sensitized Nanocrystalline TiO_2 Ceramic Film and Its Photoelectricity Property

摘要

Dye-sensitized nanocrystalline TiO_2 solar cell is a new kind of photoelectron chemical solar cell. Because of its simple fabrication procedure, low cost, better stability and clean energy, the preparation of nanocrystalline TiO_2 has attracted an increasing interest of the world researchers. In this paper, TiO_2 film was obtained by spreading TiO_2 sol on the conductive glass substrate. To improve the performance of the photoelectrode, TiO_2 powder (P25) had been doped into the TiO_2 sol. Moreover, these films were sensitized by cis-dithiocyanato bis(4,4'-biscarboxy-2,2'-bipyridine) ruthenium in the anhydrous ethanol. XRD, XPS and AFM were used to characterize the microstructure, element composition and micrograph of the films. The results show that the crystal type of TiO_2 is a mixture of anatase and rutile TiO_2, as well as the fact that photoelectricity property of the TiO_2 thin films is improved greatly by doping P25.