Dye-Sensitized Nanocrystalline TiO₂ Ceramic Film and its Photoelectricity Property

Abstract

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.