Modified low temperature solid state synthesis and photoluminescent properties of Y_0.48Li_1.5V_{1 − x} P _x O₄:Eu³⁺ (x = 0.2, 0.4, 0.6) nanophosphors

Abstract

A modified low temperature solid state process has been proposed to systematically synthesize europium-doped yttrium phosphate-vanadates with general formula Y_0.48Li_1.5V_{1 − x} P _x O₄:Eu³⁺ (x = 0.2, 0.4, 0.6). All the Y_0.48Li_1.5V_{1 − x} P _x O₄:Eu³⁺ products were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The excitation and emission spectra were measured at room temperature. Y_0.48Li_1.5V_{1 − x} P _x O₄:Eu³⁺ show the characteristic missions of Eu³⁺ (⁵ D ₀−⁷ F _{1, 2, 3, 4} transitions dominated by ⁵ D ₀−⁷ F ₂), intensities of the products were sensitive to the x value, and the x value had an obvious influence on the (⁵ D ₀−⁷ F ₂)/(⁵ D)₀−⁷ F ₁) intensity ratio of Eu³⁺. In addition, incorporation of Li⁺ ions in the phosphors reduce the amount of Y₂O₃, lower the cost of production, and cause a new phase Li₃VO₄.