Ultrahigh-sensitive optical temperature sensing based on ferroelectric Pr3+-doped (K0.5Na0.5)NbO3
Ultrahigh-sensitive optical temperature sensing based on ferroelectric Pr3+-doped (K0.5Na0.5)NbO3
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基于铁电Pr3掺杂(K0.5Na0.5)NbO3的超高灵敏光学温度传感
DOI：
10.1063/1.4941669
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发表时间：
2016
影响因子：
4
通讯作者：
Yu Miao
中科院分区：
文献类型：
--
作者：
Tang Wei;Wang Shaochen;Li Zhenglin;Sun Ye;Zheng Limei;Zhang Rui;Yang Bin;Cao Wenwu;Yu Miao
基于稀土材料荧光强度比变化的光学温度传感具有电学温度传感无法比拟的诸多优势，因此受到人们的广泛关注。然而，受限于两个热链接的稀土离子水平的最大能量分离，这种温度传感的最高灵敏度基本上小于2878/T2，如先前从不同的系统中所报道的。在这项工作中，我们证明，超高灵敏度的温度传感可以实现从Pr 3+掺杂的（K0.5Na0.5）NbO 3的1D 2 - 3 H4发射的强度比的基础上的3 P0 - 3 H4发射。当温度从室温升高到456 K时，该比率可以增加高达18倍，很好地拟合了热链接能级式方程，并显示出7997/T2的灵敏度。这一比值的显著变化归因于两个发射能级之间的相互作用和价间电荷转移态。这项工作可能提供了一个…
Optical temperature sensing based on the variation of the fluorescence intensity ratio of rare-earth materials has become appealing due to the multiple superiorities over the electrical temperature sensing. However, confined by the largest energy separation of two thermally linked levels of rare-earth ions, the highest sensitivity of such temperature sensing is essentially smaller than 2878/T2, as reported previously from diverse systems. In this work, we demonstrate that ultrahigh-sensitive temperature sensing can be achieved from Pr3+-doped (K0.5Na0.5)NbO3 based on the intensity ratio of the 1D2-3H4 emission to the 3P0-3H4 emission. The ratio can be increased as high as 18-fold when temperature rises from room temperature to 456 K, nicely fitting a thermally linked-levels-like equation and showing an ultrahigh sensitivity of 7997/T2. The striking change of the ratio is attributed to the interaction between the two emission levels and the intervalence charge transfer state. This work may have provided a ...