Characteristics of nano-sized ZnGa2O4 phosphor prepared by solution combustion method and solid state reaction method

ZnGa2O4 phosphors were prepared by both SCM (solution combustion method) and SSRM (solid state reaction method). The properties of the both ZnGa2O4 phosphors were investigated by TGA (Thermogravimetric analysis), SEM (scanning electron microscope), BET (Brunauer Emmett Teller), PL (photoluminescence) and XRD (X-ray diffraction). The particle size of SCM phosphor was about one-hundredth of SSRM phosphor. The PL intensity of SCM phosphor was about 1.5-fold higher than that of SSRM phosphor. The SCM phosphor was also tried to be doped with Mn2+ ions. The highest PL peak was observed with Mn2+ ions of 0.003 mol fraction. The peak was shifted from blue (470 nm) to green (513 nm) color. These results might be very useful for high efficiency phosphors for displays such as field emission displays and plasma display panels.