Pr³⁺掺杂YBO₃和Y₃BO₆荧光粉的制备及光学性能研究
Preparation and Luminescence Properties of Pr³⁺ doped YBO₃ and Y₃BO₆ Phosphors

采用高温固相法合成了系列YBO₃:Pr³⁺和Y₃BO₆ :Pr³⁺荧光粉。用XRD、SEM、激发和发射光谱对样品进行了表征分析。结果表明：硼源的用量决定了最终产物的相结构，样品呈现不规则的颗粒状。在紫外激发下，Y₃BO₆:Pr³⁺荧光粉展现了强烈的红色发光(¹D₂→³H₄)，而与³P₀相关的蓝绿光发射发生猝灭。YBO₃:Pr³⁺荧光粉的强发光区分布在紫外区(250~330 nm)，在可见光区发光较弱，主要发光来自³P₀能级。发光机理分析表明由于Y₃BO₆比YBO₃具有更高的声子能量，因此在可见光区，Y₃BO₆以¹D₂发光为主，³P₀部分发生淬灭，而在YBO₃中可观察到³P₀→基态跃迁发光。
A series of Pr³⁺ doped YBO₃ and Y₃BO₆ phosphors were prepared via solid-state reaction. XRD, SEM, PLE and PL spectra were used to characterize samples. The results revealed that the dosage of B plays an important role in the formation of the final product and the samples were irregular and granular. Under UV excitation, Y₃BO₆:Pr³⁺ phosphors showed strong red luminescence (¹D₂→³H₄), while the blue-green emission from ³P₀ was quenched. The strong luminescence region of YBO₃:Pr³⁺ is distributed in the ultraviolet region (250 - 330 nm). In the visible region, the luminescence from the ³P₀ level is weak. The analysis of luminescence mechanism shows that because Y₃BO₆ has higher phonon energy than YBO₃, Y₃BO₆:Pr³⁺ is dominated by ¹D₂ luminescence in the visible region, and the luminescence from the ³P₀ level is quenched, while the luminescence from the ³P₀ to ground state can be observed in YBO₃.