Abstract: Transparent TiO₂ membrane were formed by spin-coating method with TiO₂ colloid prepared with tetrabutyl titannute and the influence factors were studied in this paper. Results showed that the surfactant can improve homogeneity and roughness of the membrane. The measured results indicated that the photoelectric properties of TiO₂ membrane were affected by the thickness and roughness of the membrane, by sintering temperature and sintering time, and could be improved by merocyanine as a sensitizer.