Effect of Annealing on Structure and Morphology of Cadmium Sulphide Thin Film Prepared by Chemical Bath Deposition
Cadmium sulphide (CdS) thin film was deposited on glass substrate by chemical bath deposition (CBD) technique. Cadmium acetate and thiourea were used as the source of Cd+2 and S–2 respectively. The deposition temperature was 80 °C and deposition time was 2 hour. The grown film was annealed at 200 °C for 1 hour to see the change in the structure and surface morphology. The prepared films were characterized using X-ray diffraction (XRD) and Field emission scanning electron microscope (FE-SEM). The annealed film exhibited polycrystalline phases and smooth surface morphology. XRD pattern of the annealed film revealed an increase in the peak intensity with respect to the as prepared film. Annealing of film resulted in decrease of FWHM, dislocation density and strain value where as the crystallite size increased. FE-SEM image shows bigger and expanded grains in case of annealed film where grain boundaries are about to disappear.
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Document Type: Research Article
Publication date: June 1, 2014
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