Crystal structure, luminescence enhancement and white LEDs application of NaZnPO4:Eu3+ red phosphors

Abstract The occupy of Eu 3+ ions in the crystal lattice of NZPO:Eu 3+ ions are studied by theoretical calculation and experimental. The electric structure and density of states of NZPO and NZPO:Eu 3+ were comparatively studied by the first-principles, which indicated that the band gap of NZPO decreased after doping Eu 3+ ions. The XRD patterns and PL spectra of NZ 1-x PO:xEu 3+ or N 1-y ZPO:yEu 3+ phosphorare measured in the sake of prove the occupy of Eu 3+ ions. The optimal sintering temperature are confirmed by the PL spectra and XRD patterns of a series NZPO:0.04Eu 3+ phosphors prepared at different temperature.The effect of the charge compensator and different matrix component on the emission intensity of the phosphors was investigated. Moderate Na + ions substitute for Zn 2+ ions will enhance the emission intensity.The thermal quenching measurement revealed that NZPO:Eu 3+ phosphor had better thermal stability. The results indicated that this phosphor can be used as a red supply light material for UV or blue based white LED.