In this paper, the Gd₂O₃: Yb³⁺/Er³⁺/Bi³⁺ phosphors are prepared by sol-gel method. The upconversion (UC) emission spectra of Gd₂O₃:Yb³⁺/Er³⁺/Bi³⁺ phosphors are measured under 980 nm excitation. The UC emission intensity can be enhanced by the codoped Bi³⁺ ions. The temperature sensing performance is investigated with the fluorescence intensity ratio(FIR) technology based on thermal coupled levels of Er³⁺ ions, the sensitivity of the Gd₂O₃:2 mol%Yb³⁺/1 mol%Er³⁺/2 mol%Bi³⁺ phosphor reaches 0.0075 K⁻¹ at 548 K. Therefore, the Gd₂O₃: Er³⁺/Yb³⁺/Bi³⁺ phosphors may be a candidate for temperature sensor.

本文采用溶胶-凝胶法制备了Gd ₂ O ₃：Yb ³⁺ / Er ³⁺ / Bi ³⁺荧光粉。在980 nm激发下测量Gd ₂ O ₃：Yb ³⁺ / Er ³⁺ / Bi ³⁺荧光粉的上转换（UC）发射光谱。通过共掺杂的Bi ³⁺离子可以提高UC发射强度。基于Er ³⁺离子的热耦合能级，Gd ₂ O ₃：2 mol％Yb ³⁺的灵敏度，采用荧光强度比（FIR）技术研究了温度感测性能。/ 1 mol％Er ³⁺ / 2 mol％Bi ³⁺荧光粉 在548 K下达到0.0075 K ^-1。因此，Gd ₂ O ₃：Er ³⁺ / Yb ³⁺ / Bi ³⁺荧光粉可能是温度的候选者传感器。