A universal strategy to enhance the absolute sensitivity for temperature detection in bright Er3+ /Yb3+ doped double perovskite Gd2ZnTiO6 phosphors
A universal strategy to enhance the absolute sensitivity for temperature detection in bright Er3+ /Yb3+ doped double perovskite Gd2ZnTiO6 phosphors
复制标题
提高明亮 Er3 /Yb3 掺杂双钙钛矿 Gd2ZnTiO6 荧光粉温度检测绝对灵敏度的通用策略
DOI：
10.1039/c9qm00726a
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发表时间：
2020
影响因子：
7
通讯作者：
Weixiong You
中科院分区：
文献类型：
--
作者：
YoufushengWurlitzer;Shouliang Xu;Zongliang Xiao;Fengqin Lai;Jianhui Huang;Junxiang Fu;Xinyu Ye;Weixiong You
作为温度检测应用中的关键参数的绝对灵敏度受热耦合能级（TCL）的荧光强度比（FIR）的影响，而没有对FIR效应的利用进行普遍研究以合理地实现高绝对灵敏度。本文首次提出了一种通用的FIR效应控制策略。在Er 3+激活的Gd 2 ZnTiO 6（GZT）系统中，基于该策略，在2 H11/2- 4S 3/2组中获得了218.8 × 10− 4K −1的最大绝对灵敏度，相对于其原始最大绝对灵敏度提高了4.6倍。可以证明的是，在313 K时，2 H11/2- 4S 3/2组的最大绝对灵敏度为398.7 × 10−4 K−1，在Er 3+激活的NaYF 4材料中获得，其提高了12.3倍。如此高的绝对灵敏度在氟化物上转换（UC）材料中是前所未有的。此外，高灵敏度和优异的UC发射表明，Er 3+激活的GZT材料可能是一个候选人的温度检测。该工作为提高绝对灵敏度和保持相对灵敏度提供了一种通用策略，为温度检测的发展开辟了新的视角。
The absolute sensitivity as a crucial parameter in temperature detection applications is affected by the fluorescence intensity ratio (FIR) of thermally coupled levels (TCLs), whereas no universal research on the utilization of the FIR effect has been performed to rationally achieve high absolute sensitivity. Herein, a universal strategy on the manipulation of the FIR effect is put forward for the first time. In the Er3+-activated Gd2ZnTiO6 (GZT) system, the maximum absolute sensitivity of 218.8 × 10−4 K−1 at 313 K is obtained based on this strategy in the 2H11/2–4S3/2 group, which is enhanced by a factor of 4.6 relative to its original maximum absolute sensitivity. Provably, the maximum absolute sensitivity of 398.7 × 10−4 K−1 at 313 K in the 2H11/2–4S3/2 group is gained in the Er3+-activated NaYF4 material, which is enhanced by a factor of 12.3. Such high absolute sensitivity is unprecedented in fluoride upconversion (UC) materials. Besides, high sensitivity and excellent UC emissions suggest that the Er3+-activated GZT material may be a candidate for temperature detection. This work offers a universal strategy to enhance the absolute sensitivity and maintain the relative sensitivity and opens a new perspective for the development of temperature detection.