Preparation of luminescent films of zinc sulfide by spraying of solutions onto a heated substrate

New methods for preparing luminescent materials, especially thin-film luminophores, are of value and in this work the authors prepare luminescent films of zinc sulfide by the method of spraying solutions onto a heated substrate. The working solutions consisted of zinc chloride and thiourea. The results obtained made it possible to determine the effect of different factors on the nature of the spectra and the intensity of the luminescence. The luminescence properties of films were found to vary over wide limits for different conditions of deposition of zinc sulfide by the method used here. The temperature of the substrate, the ratio of the components, and the pH of the solution have the greatest effect.