纳米多孔TiO_2薄膜的合成及其光电化学性能

SYNTHESIS AND PHOTOELECTROCHEMICAL PROPERTIES OF SEMI-CONDUCTOR NANO-POROUS TiO_2 FILM

采用溶胶-凝胶、水热合成、旋转涂覆等方法制备了纳米多孔TiO2薄膜。以扫描电镜、X射线衍射等手段,分析了不同纳米多孔TiO2薄膜的结构。通过比较不同薄膜制作的染料敏化太阳能电池性能,寻求不同方法所制备薄膜对DSC性能的影响因素。实验结果表明,旋转涂覆法所制备的染料敏化太阳能电池具有较高的光电化学性能,在50mW/cm2的模拟光照下(AM1.5)开路电压为0.696V,短路电流为6.19mA/cm2,填充因子为0.584。

The nano-porous TiO2 films were fabricated using sol-gel process, hydmthermal method and spin coating,respectively. The characteristics of those films influenced by different processing methods and processing conditions were investigated by scanning electron microscopy and X-ray diffraction. The effect of the morphology of different films on the performance of DSC was studied. With the optimized film characteristics and cells＇processing conditions, the highest shortcircuit photocurrent （Isc） of 6.19 mA/cm2, open-circuit voltage （Voc） of 0. 696 V and the fill factor （ff） of 0. 584 could be obtained with the cell which was fabricated using the spin coating method under simulated solar irradiation （50 roW/cm^2, standard AM 1.5）.