Some Optical Properties of (ZnTe) Thin Films Prepared by Thermal Evaporation Technique on a Glass Substrate

Abstract

Thin films of Zinc telluride (ZnTe)were deposited by thermal evaporation technique on a glass substrate. The optical obtained data were analyzed using numerical analysis program which showed that the transition mechanism involved indirectly allows transition, since the best line dependence is obtained from a plot of 0.5 ( )  h versus photon energy ( ) h .The band gap decreased from 1.15 to 0.96 eV as the substrate temperature varied from 410 to 510 K. Such behavior is attributed to unsaturated defects, which are confirmed by XRD examinations. PACS:78.20.Ci, 71.30.+h, 72.90. +y