Preparation of thin films of copper sulfide by chemical bath deposition

Abstract

CuS thin films were deposited onto microscope glass slide by chemical bath deposition method. Recently, chemical bath deposition method became very popular method due to some advantages such as simple, low cost, ability to cover large substrate areas and can operate at low processing temperature. In this study, aqueous solutions of copper sulphate, thiourea and tartaric acid have been used as precursors during deposition process. In this experiment, the solution concentration was varied from 0.05 to 0.2 M in order to investigate the optimum conditions for the preparation of CuS thin films. The structural, morphological, compositional and optical characterization of the films were carried out by X-ray diffraction, scanning electron microscopy, energy dispersive analysis X-ray and UV-Visible spectrophotometer, respectively. The X-ray diffraction analysis showed the polycrystalline in nature with hexagonal crystal. The dense morphology of CuS films with homogeneous grains could be observed for the films deposited using 0.2 M of solution concentration. These films also exhibited higher absorption value as compared with other solution concentrations.