Abstract
Thin films of Copper sulphide were deposited on gla ss substrates using chemical bath deposition techni que at room temperature from the aqueous solution containing different concentra tion of copper sulphate between 0.05M and 0.15M. Th e effects of the copper concentration of the chemical bath on structural an d optical properties of the amorphous thin film wer e investigated and discussed. The optical absorption and transmission of the thin films were observed between of 330-1100nm taken at room temperature. The optical band gaps of the as-synthesized copper sulp hide thin film for various concentrations were meas ured. The surface morphology has been observed using scanning electron microscop y (SEM) and atomic force microscopy (AFM). The resu lts obtained from AFM demonstrated that the reflectivity was closely rela ted to the surface roughness of the film. High surf ace roughness has a strong scattering effect on light and lowers the reflectiv ity. X-ray diffraction (XRD) patterns show that cry stallinities of the films are dependent on the copper concentration in the soluti on.
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