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Published in:
23-05-2016
Influence of Ni on structural, morphological and optical properties of nanocrystalline CdS thin films prepared by chemical bath deposition method
Published in: Journal of Materials Science: Materials in Electronics | Issue 9/2016
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Abstract
Nickel–cadmium sulphide thin films were prepared by chemical bath deposition technique with different molar ratios of Ni. The films were annealed at 500 °C. The effects of Ni–CdS thin films the structural, morphological and optical properties of these films were investigated. X-ray diffraction studies revealed that all the deposited films were polycrystalline with hexagonal structure and exhibited (101) preferential orientation. The scanning electron microscopy images showed that the surface grain size became smaller, with less void area and led to the formation of high quality film surfaces. A dense surface structure composed of crystallites whose average size decreases when the Ni concentration ratio increases. The optical study showed that all the films were highly transparent. The band gap energy of the films lies from 2.4 to 3.5 eV. Photoluminescence spectrum shows the blue luminescence peaks which were found to be photosensitive in nature.