Growth and characterization of Zn1-xMgxS thin films for electroluminescent applications

Abstract

\(Zn_{1 - x} Mg_x S\):Mn thin films (x=0–0.30) were prepared by thermal co-evaporation of ZnS, Mg and Mn. The structural investigation shows the solid solution is formed in the Mg composition range x=0–0.25 and phase segregation occurs at higher Mg composition (x > 0.25). The optical band gap shows an increase with increase of Mg composition. The electroluminescent emission corresponding to the transition \(Mn^{2 + }\) ion shows a blue shift with increase of Mg composition in the film. \(Zn_{1 - X} Mg_x S\):Mn films could be used as an active layer in a.c. thin film electroluminescent (ACTFEL) devices for obtaining green emission color.