Enhancement of photoluminescence properties of Y_0.95(P_0.6V_0.4)O₄:Eu_0.05 phosphors by doping Al³⁺ ions

This paper reports an approach for improving the photoluminescence characteristics of red-emitting Y_0.95(P_0.6V_0.4)O₄:Eu_0.05 phosphors, with the incorporation of Al³⁺ ions, using a chemical co-precipitation process. In this paper, structural, scanning electron microscopic (SEM), photoluminescence properties, infrared spectroscopy, and CIE of the Y_0.95−x(P_0.6V_0.4)Al_xO₄:Eu_0.05 (x = 0.0, 0.005, 0.01, 0.015, 0.02, 0.025, 0.03, 0.035) phosphors are reported. The doping of a small amount of Al³⁺ ions to Y_0.95−x(P_0.6V_0.4)Al_xO₄:Eu_0.05 phosphors significantly enhanced the emission intensity up to x = 0.025%. The most dominant red emission intensity peak of Eu³⁺ for ⁵D₀ → ⁷F₂ transition of the Y_0.975(P_0.6V_0.4)Al_0.025O₄:Eu_0.05 phosphor is located at 622 nm, which is stronger than that of the free Al³⁺ Y_0.95(P_0.6V_0.4)O₄:Eu_0.05 phosphor. The result shows that this phosphor has a certain amount of the application prospect of the white LED.