钠离子对KNa4B2P3O13: Sm荧光粉发光性能的增强作用研究

通过高温固相法在硼磷酸盐KNa₄B₂P₃O₁₃基质中掺杂稀土Sm3+离子获得橘红色发光性能，研究了电荷补偿剂Na+对该荧光粉发光性能的影响，开展了粉末X射线衍射、红外光谱、紫外可见漫反射、荧光光谱、荧光寿命及量子效率等测试对材料的物相、形貌和发光性能进行了表征。研究结果表明，该荧光粉的荧光发射源于Sm3+的4G_5/2→6H_5/2（562 nm）、4G_5/2→6H_7/2（598 nm）和4G_5/2→6H_9/2（645 nm）跃迁，Na+的掺杂没有改变Sm3+特征发射峰的形状和位置，增强了其发光强度。Na+浓度为1%时，可使发光积分强度提高48%。此外，掺杂Na+对荧光粉的寿命和色坐标无明显影响，其色坐标均位于橘红色区域。 

Enhancement of sodium ions on the luminescent properties of the KNa4B2P3O13: Sm phosphor

Rare-earth ions Sm3+ were doped into borophosphate KNa₄B₂P₃O₁₃ by a high-temperature solid-state reaction so that orange-red emission was displayed. The influence of sodium ions (Na+) as charge compensators on the luminescent properties was studied. Powder X-ray diffraction, Fourier infrared, UV-Vis diffuse reflection, fluorescence spectra, lifetime, and quantum efficiency were performed to characterize the phase, morphology and luminescence properties of the material. The research showed that the fluorescence emission of the phosphor originated from the 4G_5/2→6H_5/2 (562 nm), 4G_5/2→6H_7/2 (598 nm) and 4G_5/2→6H_9/2 (645 nm) transitions of Sm3+ ion, the introduction of Na+ ion enhanced the luminescent intensity without any change of the shapes and positions for the typical transitions of Sm3+ ion. When the doping concentration of Na+ ions was 1%, the integrated luminescent intensity could be increased by 48%. In addition, the doped Na+ ions had little effect on the fluorescence lifetime and color coordinates of the phosphor, and the color coordinates of the phosphor were located in the orange-red area.