In the last decade, there was a trend to use low cost method to prepare nano thin films for the applications of renewable energy devices [1-3]. ZnO and TiO2 are among the most used materials to fabricate an important type of these devices called dye sensitized solar cell [4]. ZnO as a material has found numerous applications in many fields: for example it used as piezoelectric and optoelectronic device, in the area of electronics as field emitters, in lasers as medium for UV radiation, in industrial chemistry as photocatalysts [5-8]. However, the ... Web Site:  Web Site for Article