Spectroscopic characterization of chemical bath deposited cadmium sulphide layers

Thin films of cadmium sulphide have been prepared by chemical bath deposition in alkaline ammonia solutions from cadmium acetate and thiourea, using sodium citrate and/or ammonium chloride as chelating agent. The films grown from the bath without citrate are uniform and adherent, have a high transmittance and good reflectance in the visible region, and are about 2 times thicker than the films deposited from the ,,standard" bath. The evolution of optical characteristics of CdS films after annealing process was influenced by the deposition conditions.