Bi³⁺,Eu³⁺ co-doped SrLu₂O₄ phosphors were synthesized by a solid state reaction method. Their structural, luminescent and temperature sensing properties have been systematically investigated. The color-tunable emissions from violet to red were detected with the increase of Eu³⁺ concentration. Relying on energy transfer process from Bi³⁺ to Eu³⁺ and thermal quenching behaviour, the fluorescence intensity ratio (FIR) presents excellent temperature sensing performance. The maximum absolute and relative sensitivities reach 1.10% K⁻¹ and 0.87% K⁻¹, respectively. These meaningful results indicate that SrLu₂O₄:Bi³⁺,Eu³⁺ is a promising material for optical temperature sensing.

中文翻译：

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基于 SrLu2O4:Bi3+,Eu3+ 荧光粉发光的自校准光学温度计

采用固相反应法合成了Bi ³⁺ ,Eu ³⁺共掺杂SrLu ₂ O _{4荧光粉。}已经系统地研究了它们的结构、发光和温度传感特性。随着Eu ³⁺浓度的增加，检测到从紫色到红色的颜色可调发射。依靠从Bi ³⁺到Eu ³⁺的能量转移过程和热猝灭行为，荧光强度比（FIR）表现出优异的温度传感性能。最大绝对和相对灵敏度分别达到 1.10% K ^-1和 0.87% K ^-1。这些有意义的结果表明，SrLu₂ O ₄ :Bi ³⁺ ,Eu ³⁺是一种很有前途的光学温度传感材料。