The Production of ZnS thin films prepared by spray pyrolysis and the studied of characteristic properties

The Production of ZnS Thin Films Prepared by Spray Pyrolysis and The Studied of Characteristic Properties Zinc Sulfide ( ZnS ) thin film is a promising material for its use in various electronical devices design which mainly exist in an ct-phase ( hexagonal ) and a P-phase ( cubic ). In opto-electronics, ZnS materials ( II- VI groub compound ) can be used as light emitting diode in the blue to ultraviolet spectral region due to its wide band gap of 3.5 -3.7 eV at room temperature. In addition, in the area optics, ZnS can be used as a reflactor and dielectric filter because of its high refractive index ( 2.35 ) and its high transmittance (75% ) in the visible range, respectively. In this study, ZnS thin films were produced by spray pyrolysis as a function of different S : Zn molar ratio. The structure, surface morphology, electrical and optical properties of these films are investigated as a function of substrate temperatures, deposition time, solition spray rate, and compound ratio. It is found that the films prepared at substrate temperature of 500°C, deposition time of 30 min ( about 4u,m thick ), solition spray rate of 5ml min