Abstract
Zn2-xMnxSiO4 green phosphors have been prepared by the solid state reaction, and photoluminescence, color purity and decay time were investigated as a function of both the firing conditions and the activator concentrations (X=0.005-0.12) using MnCO3, MnO, MnSO4 and MnC2O4 as activators. For the phosphors doped with various activator compounds, there were no distinct differences in the color purity, FWHM values of emission peaks and the color coordinate in the CIE chromaticity diagram. However, Manganese concentration affected greatly the photoluminescence and the decay time. The decay time decreased from 30ms to 6ms as Mn concentration increased from X=0.005 to X=0.12. The decay time was measured at about 9ms for the phosphors doped with X=0.08 showing the highest luminance.
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