Pechini法制备TiO 2薄膜及其在染料敏化太阳电池中的应用

摘要

用Pechini法在FTO导电玻璃上制备不同厚度的TiO2薄膜，并组装成染料敏化太阳能电池。XRD结果表明，在450℃退火1h得到了主相为锐钛矿的TiO 2。SEM结果表明，TiO 2薄膜表面疏松多孔，粒径均匀，厚度在6~15μm。紫外-可见光谱分析表明，TiO2薄膜染料的吸附量随薄膜厚度的增加而增加。光电性能研究表明，在0.005 W/cm2的弱光照下，膜1(厚6μm)和膜2(厚15μm)光阳极的光电转换效率分别为6.85%和11.83%；在0.1 W/cm2的模拟标准太阳光照下，膜1和膜2光阳极的光电转换效率分别为1.72%和2.39%。%TiO2films with different thicknesses were fabricated on FTO substrates by Pechini method. XRD results show that the films annealed at 450℃ for 1 h are mainly consisted of anatase structure. SEM results indicate that obtained TiO2films are porous structure with uniform size and thickness between 6μm and 15μm. UV absorption spectra show that the absorption quantity of dye increases with the raising thickness of TiO2 films. Photoelectric conversion efficiencies of dye-sensitized solar cells (DSSCs) for one layer film (6 μm) and two layers film (15 μm) under low light intensity (0.005 W/cm2) are 6.85% and 11.83%,and those of the DSSCs for one layer film and two layers film under AM 1.5 G (0.1 W/cm2) are 1.72% and 2.39%, respectively.