The Dual Charge Compensation Effect Of Na+ Ions On The Luminescence Behavior Of Red Phosphor Namgpo4:Eu3+

A series of (NaMgPO4)(0.98-x/3):Eu-0.02(3+), Na-x(+) phosphors were prepared by the solid-state method. XRD results confirm that the phosphors contain mixture phases of crystals. The doped effect of Na+ ions on fluorescent properties of the phosphors is discussed. The results indicate that the doping effect of Na+ ions on PL intensity (615 nm) and R (the intensity ratio of D-5(0)-->F-7(2) to D-5(0)-->F-7(1)) is just the opposite. The former is a positive effect, while the latter is a negative effect. Meanwhile, R of all samples is larger than 1. But, the difference among the R of all samples is too small to affect the chromaticity coordinates of the samples. These measurements showed that the sample of (NaMgPO4)(0.97):Eu-0.02(3+), Na-0.03(+) with the optimized molar concentration of Na+ ions (3%), could be a potential red-emitting phosphor for UV-based white LED. (C) 2015 Elsevier B.V. All rights reserved.