Thermal quenching is one of the most crucial challenges for LED phosphors, in which the phosphor in LED device suffers from emission loss due to non-radiative transition with increasing temperature. Here, we report a broadband-excited and color-tunable LuVO₄: Bi³⁺, Eu³⁺ phosphor that does not exhibit thermal quenching even up to 200 °C. The phosphor shows Bi³⁺ absorption broadband ranging from 250 to 400 nm, along with the sensitized Eu³⁺ red emission lines. The emission color tuned from yellow with color coordinate (0.403, 0.507) to bright red (0.609, 0.370) as a function of Bi³⁺/Eu³⁺ ratio. The phenomenon of zero thermal quenching originates from enhanced energy transfer (ET) from Bi^{3+ 3}P₁ state to Eu^{3+ 5}D₄ state through the population inversion from ³P₀ to ³P₁ at high temperature. Due to strong UV absorption, high quantum efficiency (∼76%) and excellent thermal stability, the as-prepared LuVO₄: Bi³⁺, Eu³⁺ phosphors can be potential candidates as red phosphors applied in UV-pumped LEDs.

对于LED荧光粉而言，热淬灭是最关键的挑战之一，其中LED器件中的荧光粉会因温度升高而发生非辐射跃迁而遭受发射损耗的困扰。在这里，我们报告了一种宽带激发且颜色可调的LuVO ₄：Bi ³⁺，Eu ³⁺荧光粉，即使在200°C时也不会表现出热猝灭。磷光体显示Bi ³⁺吸收宽带范围为250至400 nm，以及敏化的Eu ³⁺红色发射线。发光颜色根据Bi ³⁺ / Eu ³⁺从具有色坐标（0.403，0.507）的黄色变为亮红色（0.609，0.370）比率。零热猝灭现象的产生源于Bi ^{3+ 3} P ₁态在高温下从³ P ₀转变为³ P _1时，从Bi ^{3+ 3} P ₁态增强为Eu ^{3+ 5} D ₄态。由于强烈的紫外线吸收，高量子效率（约76％）和出色的热稳定性，所制备的LuVO ₄：Bi ³⁺，Eu ³⁺荧光粉可以作为应用于紫外线泵浦LED的红色荧光粉的潜在候选者。