The effect of pre-irradiation heat treatment on TL glow curves of ZnS thin film deposited by spray pyrolysis method

In this work, the effect of pre-irradiation heat treatment on the TL glow curves (GCs) of ZnS thin films which were deposited onto glass substrate by spray pyrolysis method using mixed aqueous solutions of ZnCl2 and thiourea was investigated. It was observed that in spite of significant effects of pre-irradition heat treatments on the number of trap states and intensity of TL GCs, there is no considerable effect of it on the trap parameters of glow peaks of developed ZnS thin film. The TL data obtained from the recorded GCs indicates an impurity influence on both the deep and shallow traps with heat treatment. TL results have been then discussed on the basis of a restructuring of the defect concentration resulting from alterations in the surface properties of the thin films and diffusion of impurities (chlorine and oxygen) induced by annealing.