基于Na_(3)Y(VO_(4))_(2):Yb^(3+)/Er^(3+)实现高灵敏度的双模式光学测温

Dual-mode Optical Thermometry with High Sensitivity Achieved in Na_(3)Y(VO_(4))_(2):Yb^(3+)/Er^(3+)

基于高温固相法合成了Na_(3)Y(VO_(4))_(2):Yb^(3+)/Er^(3+)上转换发光材料,该材料在绿光区和近红外二区均表现出较强的发光强度。在绿光区,基于Er^(3+)的~2H_(11/2)→^(4)I_(15/2)和^(4)S_(3/2)→^(4)I_(15/2)跃迁进行荧光强度比光学测温,其最佳的绝对灵敏度、相对灵敏度和温度分辨率可分别达到1.7%·K^(-1)、1.2%·K^(-1)和0.027 K;在近红外二区,基于Er^(3+):^(4)I_(13/2)→^(4)I_(15/2)跃迁的Stark劈裂所进行的光学测温,其最佳的绝对灵敏度、相对灵敏度和温度分辨率分别为3.01%·K^(-1)、0.59%·K^(-1)和0.06 K。更为重要的是,在生理温度范围内,以上两种光学温度计均表现出较高的测温准确性。所有数据均表明,Na_(3)Y(VO_(4))_(2):Yb^(3+)/Er^(3+)是一种优异的光学测温材料,可在可见区和近红外二区实现高灵敏度的双模式光学测温。

Na_(3)Y(VO_(4))_(2):Yb^(3+)/Er^(3+)upconversion(UC)material is synthesized by the high-temperature solid-state method,exhibiting strong luminescence in both green and NIR-Ⅱregion.In green region,optical thermometry based on the fluorescence intensity ratio(FIR)of Er^(3+):~2H_(11/2)→^(4)I_(15/2)and^(4)S_(3/2)→^(4)I_(15/2)transition achieves optimal absolute sensitivity(S_A),relative sensitivity(S_R)and temperature resolution(δ_T)of 1.7%·K-1,1.2%·K^(-1)and 0.027 K,respectively.In NIR-Ⅱregion,optical thermometry based on the Stark splitting of Er^(3+):^(4)I_(13/2)→^(4)I_(15/2)transition exhibits optimal SA,SR andδT of 3.01%·K^(-1),0.59%·K^(-1)and 0.06 K,respectively.More importantly,both of the two optical thermometers show high accuracy for temperature measurement within the physiological temperature range.All data indicate that Na_(3)Y(VO_(4))_(2):Yb^(3+)/Er^(3+)is an excellent luminescence material with the ability of high-sensitivity dual-mode optical thermometry in the visible and NIR region.