A novel series of Er³⁺ doped LiYbW₂O₈ phosphors were synthesized by high-temperature solid-state process. Upon 980 nm NIR laser excitation, the up-conversion emission spectra show that the intense green emissions and weak red emissions can be proposed as the transitions of ²H_11/2→⁴I_15/2, ⁴S_3/2→⁴I_15/2, ⁴F_9/2(2)→⁴I_15/2 and ⁴F_9/2(1)→⁴I_15/2 of Er³⁺ ions, respectively. The optical temperature sensing properties were carefully investigated on the basis of fluorescence intensity ratio (FIR) technology about energy level transitions of ²H_11/2→⁴I_15/2 and ⁴S_3/2→⁴I_15/2 in the range from 300 K to 500 K. Moreover, the maximum values of relative sensitivity (S_r) and absolute sensitivity (S_a) are separately about 1.62% K⁻¹ at 300 K and 0.64% K⁻¹ at 500 K, which can prove that the sensitivity of LiYbW₂O₈:Er³⁺ is superior to the latest reported materials for temperature sensors. Results evidence that the Er³⁺ doped LiYbW₂O₈ phosphors can be outstanding candidates for optical temperature sensors with high S_r and S_a.

通过高温固态法合成了一系列新型的掺Er ^3+的LiYbW ₂ O ₈荧光粉。在980 nm NIR激光激发下，上转换发射光谱表明，强烈的绿色发射和弱红色的发射可以被提议为² H ₁₁ / ² → ⁴ I ₁₅ / ^2，4 S _3/2 → ⁴ I的跃迁₁₅ / ^2，4 F _9/2（2） → ⁴ I _15/2和⁴ F _9/2（1） → ⁴ I _15/2 of Er分别有^3+个离子。光学感温性能进行了认真的调查荧光强度比（FIR）技术有关能级跃迁的基础上² ħ _11/2 → ⁴我_15/2和⁴ š _3/2 → ⁴我_15/2的范围内从300 K到500K。此外，相对灵敏度（S _r）和绝对灵敏度（S _a）的最大值分别约为300 K时的1.62％K ^-1和500 K时的0.64％K ^-1。 LiYbW ₂ O ₈的灵敏度：Er ³⁺优于最新报道的温度传感器材料。结果证明，掺Er ^3+的LiYbW ₂ O ₈荧光粉可以成为具有高S _r和S _a的光学温度传感器的出色候选材料。