A method of color mixture for white light is presented with Sr3MgSi2Os∶Eu2+,Mn2+ shell coated on Sr2SiO4∶Eu2+ core by spray pyrolysis procedure.Upon near ultraviolet (NUV) excitation,a 550 nm band emission of Eu2+ from core host combines with the simultaneous emissions of Eu2+ at 457 nm and Mn2+ at 683 nm based on energy transfer in the shell lattice to generate warm white light with color rendering index (CRI) of 91.With such a core-shell-like structure,the re-absorption of blue light from shell layer can be effectively suppressed,and the chemical stability of the phosphor is verified experimentally to be superior to that of the Sr2SiO4∶Eu2+.This new proposed phosphor provides great potential in the color mixture of blending-free phosphor converted white NUV light emitting diode (LED) devices.