Using solid-state reaction technique, we prepared a series of Bi³⁺/Eu³⁺-activated GdNbO₄ phosphors. Under 308 nm excitation, the energy transfer from Bi³⁺ to Eu³⁺ ions, which belonged to the dipole-quadrupole interaction mechanism, allowed the GdNbO₄:Bi³⁺,Eu³⁺ compounds to display tunable multi-color emissions. The temperature dependent photoluminescence emission and water resistance behaviors of the obtained samples were investigated in detail. Taking full advantage of the diverse thermal quenching performance between Bi³⁺ and Eu³⁺ ions along with their distinct characteristic color emission, we designed a highly sensitive non-invasion optical thermometer. The maximum absolute and relative sensor sensitivities of the final compounds were about 0.0367 K⁻¹ and 3.81% K⁻¹, respectively. Moreover, the as-prepared phosphors exhibited excellent cathode-luminescence properties. These above characteristics indicated that Bi³⁺/Eu³⁺-activated GdNbO₄ phosphors can be used as potential luminescent materials for non-contact temperature measurement and field emission display.

使用固态反应技术，我们制备了一系列Bi ³⁺ / Eu ³⁺活化的GdNbO ₄荧光粉。在308 nm激发下，从Bi ³⁺到Eu ³⁺离子的能量转移属于偶极-四极相互作用机理，使GdNbO ₄：Bi ³⁺，Eu ³⁺化合物显示出可调的多色发射。详细研究了所得样品的温度依赖性光致发光发射和耐水性行为。充分利用Bi ³⁺和Eu ³⁺之间的不同热猝灭性能离子以及它们独特的特征色发射，我们设计了一个高灵敏度的非侵入式光学温度计。最终化合物的最大绝对和相对传感器灵敏度分别为约0.0367 K ^-1和3.81％K ^-1。此外，所制备的磷光体表现出优异的阴极发光性能。这些以上特性表明，Bi ³⁺ / Eu ³⁺活化的GdNbO ₄荧光粉可用作潜在的发光材料，用于非接触温度测量和场发射显示。