A series of Eu²⁺/Dy³⁺ single doped and co-doped Na₃Sc₂(PO₄)₃ phosphors were synthesized by the high-temperature solid-state method, and their phase, morphology, and luminescence properties were characterized. Under the excitation of 370 nm, the Na₃Sc₂(PO₄)₃:Eu²⁺,Dy³⁺ phosphor can emit white light whose spectrum is composed of a broad emission band centered at 460 nm and the other three peaks at 483, 577, and 672 nm, respectively. There is energy transfer from Eu²⁺ to Dy³⁺ ion in Na₃Sc₂(PO₄)₃:Eu²⁺,Dy³⁺ phosphor due to the good overlap between the emission spectrum of Na₃Sc₂(PO₄)₃:Eu²⁺ and the excitation spectrum of Na₃Sc₂(PO₄)₃:Dy³⁺, which is further confirmed by the fluorescence lifetime decrease of Eu²⁺ ion with the increase of Dy³⁺ concentration. The process of energy transfer is via dipole–quadruple interaction which is confirmed by applying Dexter's theory. By increasing the Dy³⁺ concentration, the color coordinates of the Na₃Sc₂(PO₄)₃:0.01Eu²⁺,xDy³⁺ phosphors can be adjusted from blue to white, and then to yellow. The optimized concentration of Dy³⁺ ions is 4.0 mol%, beyond which the concentration quenching will take place. The Na₃Sc₂(PO₄)₃:Eu²⁺,Dy³⁺ phosphor shows fairly good resistance to thermal quenching behavior, of which the emission intensity at 423 K can maintain 90.3% of the initial value (298 K). These results suggest that the Na₃Sc₂(PO₄)₃:0.01Eu²⁺,xDy³⁺ phosphors have potential applications as the color-tunable or a single-phase white emitting phosphor in white LEDs.

采用高温固相法合成了一系列Eu ²⁺ /Dy ³⁺单掺杂和共掺杂Na ₃ Sc ₂ (PO ₄ ) _{3荧光粉，对其物相、形貌和发光性能进行了表征。}在370 nm激发下，Na ₃ Sc ₂ (PO ₄ ) ₃ :Eu ²⁺ ,Dy ³⁺荧光粉可发出白光，其光谱由以460 nm为中心的宽发射带和483处的其他三个峰组成、577 和 672 nm，分别。^{Eu 2+}到 Dy ³⁺的能量转移Na ₃ Sc ₂ (PO ₄ ) ₃ :Eu ²⁺ ,Dy ^{3+荧光粉中的离子由于 Na} ₃ Sc ₂ (PO ₄ ) ₃ :Eu ^{2+的发射光谱与 Na} ₃的激发光谱之间的良好重叠Sc ₂ (PO ₄ ) ₃ :Dy ³⁺，这进一步证实了Eu ²⁺离子的荧光寿命随着Dy ^{3+的增加而降低}浓度。能量转移的过程是通过偶极-四重相互作用，应用德克斯特理论证实了这一点。通过增加Dy ³⁺浓度，可以将Na ₃ Sc ₂ (PO ₄ ) ₃ :0.01Eu ²⁺ , x Dy ³⁺荧光粉的色坐标从蓝色调整到白色，再调整到黄色。Dy ³⁺离子的优化浓度为4.0 mol%，超过此浓度将发生浓度猝灭。Na ₃ Sc ₂ (PO ₄ ) ₃ :Eu ²⁺ ,Dy ³⁺荧光粉表现出相当好的抗热猝灭行为，其中在423 K时的发射强度可以维持在初始值（298 K）的90.3%。这些结果表明，Na ₃ Sc ₂ (PO ₄ ) ₃ :0.01Eu ²⁺ , x Dy ³⁺荧光粉具有作为白色 LED 中颜色可调或单相白色发光荧光粉的潜在应用。