化学水浴法制备大面积CdS薄膜及其光伏应用

Preparation of large area CdS thin film and its application in photovoltaic cells

采用化学水浴法制备了大面积CdS多晶薄膜,研究了薄膜的形貌、结构和光学性质,结果表明,大面积CdS多晶薄膜具有良好的均匀性,通过优化CdS多晶薄膜,制成了不同CdS窗口层厚度的CdTe小面积太阳电池,减薄CdS薄膜可有效提高器件的短路电流,改善器件性能.随后,在面积30cm×40cm的衬底上制备了全面积为993.6cm2的CdTe太阳电池组件,其27个集成单元的电学性质较为均匀,太阳电池组件的光电转换效率8.13%.

In this paper,large area CdS thin film was prepared by chemical bath deposition（CBD）.The structure and morphology and optical characteristics of the thin film were investigated with XRD,optical transmittance spectra analyzer and AFM.The experimental results indicate that the properties of the thin film were homogeneous.The CdTe solar cells with different thickness of window layer by using the prepared CdS thin film were fabricated.It was found that the short circuit current density,J_ sc,of the CdTe solar cells increases with the reduction of the thickness of CdS window layer and the device performance is improved.The module of CdTe solar cells with substrate size 30cm×40cm and total area of 993.6cm2 was fabricated.The results showed that the electrical behaviors of the 27 interconnected unitc were homogeneous too.The efficiency of greater than 8% for the module of CdTe solar cells with area of 993.6 cm2 was obtained.