Luminescence Characteristics of ZnGa₂O₄:Mn²⁺,Cr³⁺Phosphor and Thick Film

Abstract

In this study, <TEX>$ZnGa_2O_4$</TEX> phosphors in its application to field emission displays and electroluminescence were synthesized through the precipitation method and <TEX>$Mn^{2+}$</TEX> ions. A green luminescence activator, <TEX>$Cr^{3+}$</TEX> ions, and a red luminescence activator were separately doped into <TEX>$ZnGa_2O_4$</TEX>, which was then screen printed to an indium tin oxide substrate. The thick films of the <TEX>$ZnGa_2O_4$</TEX> were deposited with the various thicknesses using nano-sized powder. The best luminescence characteristics were shown at a thickness of 60 <TEX>${\mu}m$</TEX>. Additionally, green-emission <TEX>$ZnGa_2O_4:Mn^{2+}$</TEX> and red-emission <TEX>$ZnGa_2O_4:Cr^{3+}$</TEX> phosphor thick films, which have superior characteristics, were manufactured through the screen-printing method. These results indicate that <TEX>$ZnGa_2O_4$</TEX> phosphors prepared through the precipitation method have wide application as phosphor of the full color emission.