Structural and optical properties of nanocrystalline ZnS thin films prepared by chemical bath deposition technique

Abstract

Nanocrystalline ZnS films grown on glass substrates by chemical bath deposition technique (CBD) using the mixed aqueous solution of zinc chloride, thiourea and ammonia at 80 °C and pH=10 for different deposition time. The characterization of thin films was carried out for the structural and optical properties using X-ray diffraction and UV-VIS spectrophotometer. A UV-VIS optical spectroscopy study was carried out to determine the optical band gap of the nanocrystalline ZnS thin film and it found to be higher (3.8 eV) compared with respect to the bulk value. In present work effects of deposition time on the structural and optical properties of CdS nanocrystalline thin films were studies.