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中文摘要：
采用水热合成法制备了CaF2∶Yb3＋,Er3＋上转换纳米粒子。在980 nm激发下,研究了来源于Er3＋的2H11/2/4S3/2→4I15/2跃迁的绿光发射和来源于4F9/2→4I15/2跃迁的红光发射。由于Er3＋具有一对热耦合能级（2H11/2/4S3/2）,所合成的样品在293573 K温度范围内有良好的温敏特性。利用荧光强度比（FIR）技术,测得样品在483 K时具有最大灵敏度0.002 85 K-1。
英文摘要：
CaF2∶ Yb3＋,Er3＋upconversion nanoparticles（ UCNPs） were synthesized by hydrothermal method. The green and red light from2H11 /2/4S3 /2→4I15 /2and4F9 /2→4I15 /2of Er3＋were investigated in detail by using the power depended luminescence intensity under 980 nm excitation. Afterwards,the as-obtained sample was proved that it had good temperature sensing property in the range of 293- 573 K based on thermal coupled levels（ TCLs） of Er3＋（2H11 /2/4S3 /2）,simultaneously the maximum sensitivity of sample was obtained at 483 K（ 0. 002 85 K- 1） by utilizing fluorescence intensity ratio（ FIR） technique. All the experiment data indicate that the sample has great luminescence property and excellent potential in temperature sensing.
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