Color Electroluminescent Devices Prepared by Metal Organic Chemical Vapor Deposition

Abstract

This paper discusses the preparation of AC thin film ZnS:Tb (green), Sm (red) and Tm (blue) color electroluminescent devices by metal organic chemical vapor deposition, using dimethylzinc and H 2 S as source gases. A new doping method for luminescent centers was used. This was accomplished by evaporating TbF 3 , SmF 3 SmCl 3 and TmF 3 after they had been heated to their melting points during the growth of ZnS in a MOCVD reactor. The maximum brightnesses of ZnS:TbF 3 , ZnS:SmCl 3 and ZnS:TmF 3 are 5000, 1000 and 10 cd/m 2 . The ZnS:SmCl 3 EL devices showed a deeper red chromaticity than the ZnS:SmF 3 EL ones.