Abstract
Eu3+ doped Li3Ba2La3(WO4)8 red phosphors were synthesized by the solid state reaction method. A pure phase was confirmed by the X-ray diffraction pattern. Diffuse reflection spectra, photoluminescence spectra, decay curves, quantum yields, and temperature-dependence luminescence spectra were measured. The Eu3+ ions can substitute the La3+ ions completely without decreasing the emission intensity obviously and the quantum yields can keep at about 95%. The activation energy from the bottom of 5D0 level to the 5D0-charge transfer state crossover is 0.24eV. All the results indicate that the Eu3+ doped Li3Ba2La3(WO4)8 can serve as a near ultraviolet excited red phosphor for white light emitting diodes.
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