Deposition and optical properties of nanocrystalline ZnS thin films by a chemical method

Highly transparent and adherent nanocrystalline large-area ZnS thin films were grown on the slide glass and the SnO₂-coated glass substrate by chemical deposition using an aqueous solution containing zinc sulfate and thioacetamide. The films were characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, UV–Vis transmission and photoluminescence. The SEM morphologies of the films revealed a string-like structure formed by the smaller particle on the ZnS film surface. The average particle size was confirmed, using XRD analysis and TEM observation, to be about 3–4 nm.