I. Introduction
Dye-sensitized solar cell (DSSC) is the third generation of solar cell with organics and nanotechnology [1]. DSSC is a device of multilayer structures which consists of photoelectrode, electrolyte and counter electrode. Besides, the researches of DSSC fast grow, and the related researches have rapid development because of their low-cost, simple process, flexibility and progressive efficiency that up to photovoltaic conversion efficiency (), but it needs higher efficiency to solve the energy crisis [2].