Structural, Morphological and Optical Properties of Nanocrystalline ZnCdTe Thin Films Developed by Electrodeposition Technique

Here we investigated the effects of cadmium (Cd) doping on the structural and optical properties of nanocrystalline ZnTe thin films. A nanocrystalline ZnCdTe thin film was successfully electrodeposited on nickel/glass substrate using potentiostat/galvanostat. The structural, compositional and optical properties of developed ZnCdTe thin films were studied by XRD, SEM, EDS, UV-VIS spectroscopy and PL spectroscopy. The diffraction peaks of ZnCdTe films observed at 2θ ≃ 24°, 30°and 40° respectively with preferred orientation indicates the crystalline nature of developed film. Crystalline size has been calculated by using Scherrer formula. A SEM photograph shows that grains are uniform and densely distributed over the surface. Compositional analysis reveals the presence of Zn, Cd and Te. With cadmium doping the optical energy band gap of ZnCdTe films were found to be 1.98 eV and photoluminescence emission of ZnCdTe film shows a broad peak in visible region.