Abstract
A good quality of Zn2SiO4:Mn phosphors were prepared by the solid state reaction method using MnCO3 as activators. The luminance properties, color purity and crystalline qualities were investigated as a function of the heating temperature and activator concentrations. In the Mn doping range from 0.005 to 0.15(g-atom/mol) in Zn2SiO4:Mn, the phosphors doped with Mn concentration of 0.08(g-atom/mol) showed the highest intensity of emission spectra and good color purity at the heating temperature of 1300°C for 4hrs under N2 atmosphere. The CIE chromaticity diagram showed that the more saturated color could be obtained for the phosphors with the Mn concentration of 0.08(g-atom/mol). As the Mn content increased, the maximum of emission spectra shifted slightly toward longer wavelength. From the SEM micrograph, it was found that the phosphors were composed of a great number of small grains about 3-8μm. The XRD analysis showed the typical rhombohedral crystal structure.
