Influence of the deposition process on the bandgap and electrical properties of TiO2 solar cells

In this paper the bandgap variation have been studied as a function to the deposition temperature, annealing temperature and water ratio. High temperature during deposition or annealing has yielded in a low bandgap, while increasing water concentration has increase it. I-V characteristics for different thicknesses demonstrates a better I_sc for a thicker sample. Conversion efficiency at a higher temperatures gave a better response towards the midrange of the UV spectrum. High temperature response in these cells can be considered as an advantage over that of conventional solar cells. We concluded that deposition parameters play a very important role in the optical and electrical characteristics of TiO₂ nano materials, theses results reflected positively in producing TiO₂ solar cells.