Dy³⁺ singly doped and Dy³⁺/Eu³⁺ co-doped Na₃Sc₂(PO₄)₃ phosphors were synthesized by high temperature solid-state reaction and their photoluminescence properties were investigated. The prepared phosphors have a single phase trigonal structure of Na₃Sc₂(PO₄)₃ and consist of micro-particles with an average particle size about 13.8 μm. Among all the Na₃Sc₂(PO₄)₃:xDy³⁺ samples, 5 mol% of Dy³⁺ ions is found to be optimum concentration because it shows strongest emission intensity under 350 nm excitation. Under 350 nm excitation, the emission spectra of Na₃Sc₂(PO₄)₃:0.05Dy³⁺,yEu³⁺ phosphors are composed of several bands associated with the transitions of both Dy³⁺ and Eu³⁺ ions from the ⁴F_9/2 and ⁵D₀ excited states, respectively. It is noticed that integrated emission intensities of Dy³⁺ ions were decreased with the increase of Eu³⁺ ion concentration due to energy transfer from Dy³⁺ to Eu³⁺ ions. The Dexter theory and Reisfield's approximation were employed to analyze the energy transfer mechanism and it is found that the dipole-dipole interaction is responsible for energy transfer from Dy³⁺ to Eu³⁺ ions. Among the Na₃Sc₂(PO₄)₃:0.05Dy³⁺,yEu³⁺ phosphors, 5 mol% of Dy³⁺ and 20 mol% of Eu³⁺ are found to be optimum concentrations because it emits strong warm white light under 350 nm excitation. Further, the quantum efficiency, lifetime, energy transfer efficiency and correlated color temperature (CCT) values of the present phosphors were estimated and compared with the other reported phosphors.

通过高温固相反应合成了Dy ³⁺单掺杂和Dy ³⁺ / Eu ³⁺共掺杂Na ₃ Sc ₂（PO ₄）₃荧光粉，并研究了它们的光致发光性能。制备的磷光体具有Na ₃ Sc ₂（PO ₄）₃的单相三角结构，并且由平均粒径约为13.8μm的微粒组成。在所有的Na ₃ Sc ₂（PO ₄）₃：x Dy ³⁺样品中，5 mol％的Dy ³⁺发现离子是最佳浓度，因为它在350 nm激发下显示出最强的发射强度。下350nm处激发，Na组成的发射光谱₃钪₂（PO ₄）₃：0.05Dy ³⁺，YEU ³⁺磷光体由具有两者的Dy的转变相关联的几个波段的³⁺及Eu ³⁺离子从⁴ F _9/2和⁵ D ₀分别激发态。注意到随着Eu ³⁺的增加，Dy ³⁺离子的整体发射强度降低。从Dy ³⁺到Eu ³⁺离子的能量转移导致离子浓度升高。用Dexter理论和Reisfield近似法分析了能量转移机理，发现偶极-偶极相互作用是引起Dy ³⁺到Eu ³⁺离子能量转移的原因。在Na ₃ Sc ₂（PO ₄）₃：0.05Dy ³⁺，yEu ³⁺荧光粉中，Dy ^3+为5摩尔％，Eu ^3+为20摩尔％。被发现是最佳浓度，因为它在350 nm激发下会发出强烈的暖白光。此外，估算了本荧光粉的量子效率，寿命，能量转移效率和相关色温（CCT）值，并将其与其他报道的荧光粉进行了比较。