摘要
主要研究了化学水浴法沉积CdS薄膜中氨水浓度对薄膜材料特性的影响。通过X射线衍射(XRD)、扫描电子显微镜(SEM)和分光光度计(UV-Vis)等测试手段对制备的CdS薄膜的结构和光学特性进行了分析。结果表明:不同的氨水浓度条件下均得到立方相CdS薄膜,薄膜沿(111)面择优取向生长。随着氨水浓度增加时CdS薄膜表面逐渐变得致密光滑,CdS薄膜的透过率增强和带隙变宽。在氨水浓度为0.10 mol/L时制备出材料特性最佳的CdS薄膜,其表面紧凑致密无针孔,颗粒大小均匀,将其应用于CZTSe薄膜太阳电池中的缓冲层材料,得到光电转化效率为3.12%的CZTSe薄膜太阳电池(该电池未经任何后硒化处理工艺)。
The influence of ammonia concentration on CdS thin films deposited by the chemical bath deposition( CBD) was studied in detail. The structural,morphological and optical properties of CdS thin films were characterized by X-ray diffraction( XRD),scanning electron microscope( SEM) and UV-visiable-NIR spectrophotometer. The results show that CdS thin films have a cubic phase with a( 111) preferential orientation. The surface morphologies of CdS thin films become compact and smooth gradually with the increasing ammonia concentration. Also,the growth rate and the thickness of CdS thin film can be controlled by adjusting the ammonia concentration. The transmittance and optical band gap show an increasing tendency with the increment of ammonia concentration. The film deposited at ammonia concentration of 0. 10 mol / L shows excellent quality with compact and smooth surface. Finally,the best CZTSe solar cell,with a conversion efficiency of 3. 12% was achieved at ammonia concentration of 0. 10 mol / L.
出处
《人工晶体学报》
EI
CSCD
北大核心
2015年第12期3401-3405,3410,共6页
Journal of Synthetic Crystals
基金
教育部博士点基金(20120031110039)
