Tb³⁺ and Eu³⁺ ion co-doped LaBWO₆ phosphors with tunable color emissions were synthesized by a conventional high-temperature solid-state reaction technique and were characterized by powder X-ray diffraction, scanning electron microscope, emission and excitation spectra, and decay lifetimes. Under 380 nm near-ultraviolet excitation, the characteristic visible emissions, which originate from the f–f transitions of Tb³⁺ and Eu³⁺ ions, were observed in the emission spectra. By increasing of the Eu³⁺/Tb³⁺ concentration ratio, the LaBWO₆:Tb³⁺,Eu³⁺ phosphors were capable of generating color tunability from green to yellow, then to red. The energy transfer process between Tb³⁺ and Eu³⁺ was demonstrated to be a resonant type via a dipole–dipole mechanism, and the critical distance calculated by the concentration quenching method was determined to be 11.1 Å. Moreover, the temperature-dependent emission spectra showed that the as-prepared phosphors possessed good thermal stability with an activation energy of 0.263 eV. These LaBWO₆:Tb³⁺,Eu³⁺ phosphors with tunable emissions may have potential applications in near-ultraviolet-pumped white light-emitting diodes.

通过常规的高温固态反应技术合成了具有可调色发射的Tb ³⁺和Eu ³⁺离子共掺杂的LaBWO ₆荧光粉，并通过粉末X射线衍射，扫描电子显微镜，发射和激发光谱对其进行了表征，和衰变寿命。在380 nm近紫外光激发下，在发射光谱中观察到了特征性可见光发射，该可见光发射是由Tb ³⁺和Eu ³⁺离子的f–f跃迁引起的。通过增加Eu ³⁺ / Tb ^3+的浓度比，LaBWO ₆：Tb ³⁺，Eu ³⁺磷光体能够产生从绿色到黄色，然后到红色的颜色可调性。Tb ³⁺和Eu ³⁺之间的能量转移过程通过偶极子-偶极子机制被证明是共振类型，通过浓度猝灭法计算的临界距离被确定为11.1Å。此外，随温度变化的发射光谱表明，所制备的磷光体具有良好的热稳定性，其活化能为0.263 eV。具有可调发射的这些LaBWO ₆：Tb ³⁺，Eu ³⁺磷光体可能在近紫外泵浦的白色发光二极管中具有潜在的应用。