A series of color-tunable KLaSiO4:Ce3+,Mn2+phosphors were successfully prepared and the luminescent properties were investigated. Upon excitation at 290 nm, the emission spectra of KLaSiO4:Ce3+,Mn2+phosphors included a blue emission band and a red emission band. Increasing the doping concentration of Mn2+ions, the red emission was strengthened considerably, and the blue emission of Ce3+ was reduced, owing to the efficient energy transfer. The composition optimized KLa0.96SiO4:0.02Ce3+,0.02Mn2+sample exhibited the white light emission brightly with the chromaticity coordinates of (0.331, 0.337). Therefore, KLaSiO4:Ce3+, Mn2+could be used as a white phosphor candidate for white light-emitting diodes devices.
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