通过溶胶-凝胶法制备了Er3+、Yb3+和Gd3+共掺杂的Y2O3、Lu2O3荧光粉, 并研究了其上转换发光和温度敏感特性。在980 nm激光激发下, 样品辐射出明亮的绿光、红光和弱的紫外光。并讨论了紫外区Er3+→Gd3+的能量传递。利用荧光强度比方法研究了基于Er3+的2H11/2和4S3/2两个热耦合能级在313～573 K范围内的光学温度传感特性, 当Gd3+离子掺杂浓度为10%时, 样品的灵敏度最大为0.005 91 K-1。

Lu2O3(Y2O3)∶Yb3+/Er3+/Gd3+ phosphors were synthesized using a sol-gel method.Upconversion(UC) luminescence and temperature-sensing properties were investigated. Under 980 nm excitation, bright green, red, and weak ultraviolet emissions were observed. The optimal Gd3+ doping concentrations in Lu2O3(Y2O3) was 10%. The energy transfer processes from Er3+ to Gd3+ ions has been investigated and discussed. By utilizing the fluorescence intensity ratio (FIR) technique, the temperature sensing behaviors of the optimal sample are investigated based on the thermally coupled levels of 2H11/2 and 4S3/2 of Er3+ ions from 313 K to 573 K. The maximal sensitivity was gained to be 0.005 91 K-1 for Y2O3∶1%Er3+/1%Yb3+/10%Gd3+.