Photoluminescent Properties of $\textrm{Zn}_2\textrm{SiO}_4$ :Mn Green Phosphors Prepared by the Solution Reaction Method

green phosphors have been prepared by the solution reaction method and the photoluminescence and crystalline properties were studied as a function of both the firing temperature (~) and the concentration of Mn activator (x=0.01~0.20). Under 147 nm and 254nm and excitation sources, the emission intensity of the phosphors was increased about 4 times increasing firing temperatures from to . From the XRD analysis, :Mn phosphors fired above showed willemite crystal structure. Under 147nm excitation, the maximum emission intensity was obtained at the Mn concentration of x=0.02 for phosphors fired at and the concentration quenching was occurred at the Mn concentration above x=0.10. The phosphor particles showed almost spherical shapes with the average size of around 2~3 by the SEM morphology.