ZUO Chengyang, CAO Zhiqin, CUI Xumei, ZHANG Xuefeng
(College of Vanadiun and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China)

Abstract: La³⁺-doped TiO₂ nanofilm photoanode was prepared by hydrothermal method. Effects of La content on the photoelectric properties of dye-sensitized solar cells were studied. The results indicated La³⁺-doping is conducive to the generation of anatase type TiO₂ powders and inhibits the grain size growing. The characteristic peaks of TiO₂ and La³⁺-doped TiO₂ are consistent with the X-ray diffraction peaks of standard anatase TiO₂ crystals, and the crystal structure of TiO₂ does not change. La doping can effectively improve the photoelectric conversion efficiency of La-TiO₂ thin film photoanode. When the La content is 0.8%, the improvement effect is the most obvious. The circuit photocurrent density is increased by 13.59% and photoelectric conversion efficiency is increased by 16.90%.
Key words: La-doped; TiO₂; hydrothermal method; photoelectric properties