Optical Temperature Sensing Behavior of High-Efficiency Upconversion: Er3+-Yb3+ Co-Doped NaY(MoO4)(2) Phosphor
Optical Temperature Sensing Behavior of High-Efficiency Upconversion: Er3+-Yb3+ Co-Doped NaY(MoO4)(2) Phosphor
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高效上转换的光学温度传感行为：Er3 -Yb3 共掺杂 NaY(MoO4)(2) 荧光粉
DOI：
10.1111/jace.13624
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发表时间：
2015
影响因子：
3.9
通讯作者：
Sheng Tianqi
中科院分区：
文献类型：
--
作者：
Yang Xingxing;Fu Zuoling;Yang Yanmin;Zhang Chunpeng;Wu Zhijian;Sheng Tianqi
采用水热法合成了一类Yb 3 +/Er 3+共掺杂的NaY（MoO 4）2上转换发光材料。通过X射线衍射（XRD）对样品的结构和物相组成进行了表征。研究了Yb 3 +/Er 3+共掺杂NaY（MoO 4）2的紫外发光特性。浓度依赖性研究表明，最佳组成是实现了2%的Er 3+和10%的Yb 3+掺杂浓度。双光子激发UC机制进一步说明了绿色增强是由一种新的能量转移（ET）途径引起的，该途径需要Yb 3+离子的强基态吸收和Yb 3 +-MoO 42 −二聚体的激发态吸收，然后是有效的能量转移到Er 3+离子的高能态。我们还首次研究了在980 nm激光二极管激发下，在303和523 K之间的UC发射的光学测温行为的热性质。与以前报道的基于稀土离子荧光的光学温度传感器相比，可以获得更高的温度测量灵敏度。这些结果表明，该样品是一个有前途的候选人，光学温度传感器具有高灵敏度。
A class of Yb3+/Er3+co‐doped NaY(MoO4)2upconversion (UC) phosphors have been successfully synthesized by a facile hydrothermal route with further calcination. The structural properties and the phase composition of the samples were characterized by X‐ray diffraction (XRD). The UC luminescence properties of Yb3+/Er3+co‐doped NaY(MoO4)2were investigated in detail. Concentration‐dependent studies revealed that the optimal composition was realized for a 2% Er3+and 10% Yb3+‐doping concentration. Two‐photon excitation UC mechanism further illustrated that the green enhancement arised from a novel energy‐transfer (ET) pathway which entailed a strong ground‐state absorption of Yb3+ions and the excited state absorption of Yb3+–MoO42−dimers, followed by an effective energy transfer to the high‐energy state of Er3+ions. We have also studied the thermal properties of UC emissions between 303 and 523 K for the optical thermometry behavior under a 980 nm laser diode excitation for the first time. The higher sensitivity for temperature measurement could be obtained compared to the previous reported rare‐earth ions fluorescence based optical temperature sensors. These results indicated that the present sample was a promising candidate for optical temperature sensors with high sensitivity.