Abstract
Ce3+-doped silicate phosphors (Mg2-xSiO4:xCe3+, x = 0.001–0.007 mol) for NUV w-LEDs have been synthesized by solid-state reaction method at 1450°C. The as-prepared samples have been characterized by XRD and fluorescence spectrophotometer, respectively. The XRD results show that the aim phase has been synthesized and doping Ce3+ has not resulted in impurity phase. This phosphor material exhibits a strong blue-violet emission (330–520 nm) under the near-ultraviolet radiation excitation. The average colorimetric coordinate of Mg2-xSiO4:xCe3+ (x = 0.0025 mol) is (0.1508, 0.0694), locating in blue-violet region. We have obtained bright blue-violet light via pumping the sample by NUV light (λ ≈ 365 nm), suggesting that this material can be potential as a NUV converting blue-violet phosphor for the NUV w-LEDs.
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