Influence of Preparative Conditions on Optical and Morfo-structural Properties of Zinc Sulphide Thin Films

Zinc sulphide thin films were deposited on optical glass platelets, from chemical bath containing variable amounts of thiourea, zinc acetate, ammonia and sodium citrate. The mono and multilayer technique was used in order to prepare ZnS/glass/ZnS structures with variable film thickness. The films, as were prepared and after annealing, were investigated by UV-VIS absorption/reflection spectroscopy, photoluminescence spectroscopy, scanning electron microscopy and X-ray diffraction. The optical and morpho-structural characteristics of zinc sulphide layers are strongly influenced by deposition technique reagent concentrations as well as by the annealing regime and doping conditions.