Photooxidized polysilanes were evaluated as binders connecting nano-TiO2 particles for low temperature baking process. Both of Jsc and Voc increased after TiO2 nanoparticles (P25) were connected with photooxidized polysilanes. The amount of dyes adsorbed on TiO2 layers, TiO2 flat band potentials, electron diffusion co-efficient, electron life time were measured. The increases in the Jsc and Voc were associated with increases in electron diffusion coefficients and electron life time in TiO2 layers.