Synthesis and luminescence properties of Eu2+-activated phosphor Ba3LaK(PO4)3F for n-UV white-LEDs

The simple high-temperature solid-state route was adopted to synthesize a series of related Ba3LaK (PO4)(3)F:xEu(2+) (BLKPF:xEu(2+)) blue phosphors. The photoluminescence (PL) and diffuse reflection spectra have been investigated in detail. These phosphors which can be well excited by the 388 nm near ultraviolet light, produce the emitted blue light peaks located at about 460 nm. The critical Eu2+ concentration quenching mechanism was ascribed to the dipole-dipole interaction, and the optimum concentration was eventually proved to be 0.1 mol. All above results indicate that Ba3LaK(PO4)(3)F:xEu(2+) phosphor can act as an appropriate candidate of the blue phosphor in the future. (C) 2016 Elsevier Ltd. All rights reserved.