This work reveals three structural factors for luminescent thermal quenching of Eu³⁺ in three molybdate-tungstate phosphors. The charge transfer state (CTS) energy level was found to play a major role in thermal quenching. The linkage configuration between the MoO_x group and Eu³⁺ and the distortion of the MoO_x group were regulatory factors, whereas the structural rigidity of the host had little impact. Phosphors applicable to near-ultraviolet excitable white light-emitting diodes (NUV-WLEDs) should exhibit thermally stable luminescence and effective absorption in the NUV region. Eu³⁺-doped molybdate-tungstate phosphors with MoO₆^6- groups in the host matrix are potential candidates for NUV-WLEDs. However, they exhibit poor thermal quenching of Eu³⁺ luminescence. To obtain optimal properties, the roles of the CTS energy level, linkage configuration, distortion of MoO_x groups, and structural rigidity were investigated in Eu³⁺-doped Sr₂Ca(Mo/W)O₆, Gd₃B(Mo/W)O₉, and Ca(Mo/W)O₄. These phosphors possess typical 3D-connecting MoO₆^6- groups, isolated MoO₆^6- groups, and isolated MoO₄^2- groups, respectively. This study offers a detailed analysis of the structural regulation of thermal quenching of Eu³⁺ luminescence.

这项工作揭示了三个钼酸钨磷光体中Eu ^3+的发光热猝灭的三个结构因素。发现电荷转移态（CTS）能级在热猝灭中起主要作用。所述的MoO之间的联系的配置_X基团及Eu ³⁺和的MoO的失真_X组是调节因子，而主机的结构刚度几乎没有影响。适用于近紫外激发白光发光二极管（NUV-WLED）的荧光粉应在NUV区域显示热稳定的发光和有效吸收。具有MoO ₆ ^6-的Eu ³⁺掺杂的钼酸钨酸磷光体宿主矩阵中的基团是NUV-WLED的潜在候选者。但是，它们表现出不良的Eu ³⁺发光热猝灭。为了获得最佳性能，研究了在Eu ³⁺掺杂Sr ₂ Ca（Mo / W）O ₆，Gd ₃ B（Mo / ）中CTS能级，键构型，MoO _x基团变形和结构刚度的作用。W）O ₉和Ca（Mo / W）O ₄。这些荧光粉具有典型的3D连接MoO ₆ ^6-基团，孤立的MoO ₆ ^6-基团和孤立的MoO ₄ ^2-组。这项研究提供了对Eu ³⁺发光热猝灭的结构调控的详细分析。