CdS量子点敏化TiO_2电极用于太阳能电池研究

Study on CdS quantum-dot-sensitized TiO_2 photoelectrode for solar cell application

采用光催化沉积的方法在TiO_2薄膜上沉积CdS量子点,TEM研究表明CdS量子点大小均一,直径为20nm左右。对CdS量子点制备过程进行了分析,发现生长原理为"原子原位生长过程"(Cd+S=CdS)。紫外-可见光测试结果表明CdS/TiO_2相对于TiO_2薄膜可以极大增强可见光的吸收率;将CdS/TiO_2组装成太阳能电池,电极表现出良好的光电性能,可以在太阳能电池等方面有很好的利用前景。

CdS quantum-dots were deposited on TiO2 films by Photocatalysis deposition（PCD） method. TEM results showed that the size of CdS quantum-dots were uniform distribution and the diameter were 20nm. After researched the preparation process of CdS quantum-dots, discovered that the growth principle was atoms in-situ growth（Cd＋S= CdS）. Through UV-VIS spectrum analysis, the CdS/TiO2 photoelectrode showed the higher absorptivity to TiO2 films. Then CdS/TiO2 photoelectrode were assembled to solar cell, which showed the excellent photoelectric conversion property, indicated great potential for solar cell applications.