Growth of ZnS films and post-annealing effects

We fabricated ZnS films by using a chemical spray method at ambient air conditions. Cubic-phase ZnS films were obtained at temperatures of 500 similar to 550 degrees C, which was confirmed by X-ray diffraction (XRD) and uv-visible spectrum measurements. We found that post annealing under an ambient air environment converted amorphous ZnS films into crystalline ZnO films whereas post annealing in vacuum resulted in no apparent change in crystal structure. The results of the XRD and the Raman spectra supported that high-quality ZnO films were obtained through simple air annealing of sprayed ZnS films.