Preparation of nano-crystalline CdS thin films and properties of photoelectric response

Nano-crystalline CdS thin films were prepared by chemical bath deposition method with N(CH2CH2OH)3 as complexing agent and Cd(CH3COO)2·2H2O and(NH2) 2CS as precursors.The influence of the deposition condition,such as the concentrations of precursors,complexing agent,pH value and deposition temperature,on the characteristics of the CdS thin films,were examined by means of FESEM,XRD.The results indicate that the compact nano-crystalline CdS thin films with uniform CdS nanoparticles can be obtained under the optimal depositing condition.UV-Vis spectrum shows that CdS thin films with strong absorption in the short wavelength regions,which meet the requirements of solar cells window material and transition layer.The photoelectric spectrum of CdS thin films show a strong photoelectric response and hold the typical features of ntype semiconductor.