Optical thermometry based on up-conversion luminescence behavior in BaGdF5:Er3+ glass ceramics
Optical thermometry based on up-conversion luminescence behavior in BaGdF5:Er3+ glass ceramics
复制标题
基于 BaGdF5:Er3 玻璃陶瓷上转换发光行为的光学测温
DOI：
10.1016/j.jlumin.2019.116971
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发表时间：
2020-04-01
影响因子：
3.6
通讯作者：
Yin, Min
中科院分区：
文献类型：
--
作者：
Hu, Fangfang;Lu, Siqi;Yin, Min
Er3+离子通常用作荧光强度比（FIR）温度计技术的上转换（UC）激活剂，并且共掺杂Yb3+离子以提高Er3+离子的UC发光效率。然而，Yb3+离子会通过吸收980 nm激光激发而产生热效应，影响FIR技术的精度。 FIR技术的挑战仍然是寻找具有高UC发光效率的优质主体材料，无需敏化剂Yb3+离子，并且可以减少热效应。在此，通过熔融淬火方法成功制备了含有 Er3+ 掺杂 BaGdF5 纳米晶体（NCs）的玻璃陶瓷（GC）。 X射线衍射、扫描透射电子显微镜和元素图谱证实BaGdF5 NCs的形成。由于 Er3+ 掺杂剂掺入具有低声子能量的 BaGdF5 NC 中，Er3+ 离子的 UC 发射大大增强。在 300 至 720 K 范围内进行了两个热耦合能级 (H-2(11/2)/S-4(3/2)) 的温度相关 FIR，在 300 K 时最大相对灵敏度为 1.36% K-1。根据以上所有结果，BaGdF5:Er3+ GC 在高精度温度计中具有潜在的用途。
Er3+ ions are often used as up-conversion (UC) activators for fluorescence intensity ratio (FIR) thermometer technique, and Yb3+ ions are co-doped for improving the UC luminescence efficiency of Er3+ ions. However, Yb3+ ions will cause heating effect by absorbing 980 nm laser excitation which affects the precision of FIR technique. Challenge of FIR technique still remains to seek for superior host materials of high UC luminescence efficiency without sensitizer Yb3+ ions, in which heating effect can be reduced. Herein, glass ceramics (GC) containing Er3+-doped BaGdF5 nano-crystals (NCs) were successfully elaborated through melt-quenching method. X-ray diffraction, scanning transmission electron microscopy and element mappings are convinced the formation of BaGdF5 NCs. The UC emissions of Er3+ ions are greatly enhanced due to the Er3+ dopants incorporated into the BaGdF5 NCs with low phonon energy. The temperature dependent FIR of two thermal coupled energy levels (H-2(11/2)/S-4(3/2)) was carried out from 300 to 720 K, and the maximum relative sensitivity is 1.36% K-1 at 300 K. According to all the above results, the BaGdF5:Er3+ GC may have possible utilization in thermometer with high precision.