Growth and characterization of Zn1-xMgxS thin films for electroluminescentapplications

Zn1-xMgxS: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 a t higher Mg composition (x > 0.25). The optical band gap shows an increase with increase of Mg composition. The electroluminescent emission correspond ing to the transition Mn2+ ion shows a blue shift with increase of Mg compo sition in the film. Zn1-xMgxS:Mn films could be used as an active layer in a.c. thin film electroluminescent (ACTFEL) devices for obtaining green emis sion color. (C) 2001 Kluwer Academic Publishers.