The nano-sized phosphors were prepared using precursor process in order to improve the performance of red and green emitting phosphors for plasma display panel (PDP). $Zn_{2}Sio_{4}:Mn$ and $(Y,Gd)_{2}O_{3}:Eu$ phosphors exhibit strong emissions around 520-530 nm, 615 nm respectively. The emission intensity and particle size of powders were controlled by sintering temperature and raw material composition. The single phase of each phosphor was obtained at lower temperature than prepared by solid-state reaction method. PL luminance of each phosphor was similar to the commercial material.