CdS量子点/染料共敏化TiO_2纳米结构的光电化学性能研究

Photoelectrochemistry performance of CdS QDs and dye co-sensitized TiO_2 nanostructure

将CdS量子点沉积在TiO2纳米多孔薄膜上得到TiO2/CdS阳极。采用电脉冲沉积方法将非晶结构TiO2薄膜覆盖在CdS/TiO2阳极。经过染料敏化,得到CdS量子点/染料共敏化TiO2阳极。这种共敏化阳极的光电转化效率比TiO2/CdS阳极及TiO2/N719的光电转化效率显著提高,光电化学性能结果表明,CdS量子点/染料共敏化可以极大提高阳极对光的吸收强度及范围,提高光电流密度,进而提高光电转化效率。

The TiO2/CdS anode was made by depositing CdS quantum dots on the TiO2 porous films.Through the electrophoretic deposition（EPD）methods,the amorphous TiO2 films were covered on the TiO2/CdS anode.After dye sensitized,CdS QDs and dye co-sensitized TiO2 anode were obtained.The photoelectric conversion efficiency of anode had significant improved.The results of photoelectrochemistry performance showed that the CdS quantum dots and dye co-sensitivity increased the intensity of absorption and expanded the spectral range,leaded to increase the photocurrentdensity and the photoelectric conversion efficiency（IPCE）.