Luminescence characteristics of ZnGa2O4:Mn2+,Cr3+ phosphor and thick film

Abstract

In this study, ZnGa2O4 phosphors in its application to field emission displays and electroluminescence were synthesized through the precipitation method and Mn2+ ions. A green luminescence activator, Cr3+ ions, and a red luminescence activator were separately doped into ZnGa2O4, which was then screen printed to an indium tin oxide substrate. The thick films of the ZnGa2O4 were deposited with the various thicknesses using nano-sized powder. The best luminescence characteristics were shown at a thickness of 60 μm. Additionally, green-emission ZnGa2O4:Mn2+ and red-emission ZnGa2O4:Cr3+ phosphor thick films, which have superior characteristics, were manufactured through the screen-printing method. These results indicate that ZnGa2O4 phosphors prepared through the precipitation method have wide application as phosphor of the full color emission. © 2011 KIEEME. All rights reserved.