Intense near-infrared emission, upconversion processes and temperature sensing properties of Tm3+ and Yb3+ co-doped double perovskite Gd2ZnTiO6 phosphors
Intense near-infrared emission, upconversion processes and temperature sensing properties of Tm3+ and Yb3+ co-doped double perovskite Gd2ZnTiO6 phosphors
复制标题
Tm3和Yb3共掺杂双钙钛矿Gd2ZnTiO6荧光粉的强近红外发射、上转换过程和温度传感特性
DOI：
10.1016/j.jallcom.2019.07.036
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发表时间：
2019-10-05
影响因子：
6.2
通讯作者：
You, Weixiong
中科院分区：
文献类型：
--
作者：
Wu, Youfusheng;Xu, Shouliang;You, Weixiong
Tm3+和Yb3+共掺上转换（UC）材料的近红外（NIR）发射研究因其具有良好的前沿应用前景而受到广泛关注。在这项工作中，我们重点研究了Tm3+和Yb3+共掺杂的新型双钙钛矿Gd2ZnTiO6 （GZT）荧光粉的制备和对温度的绝对灵敏度（S-A）的提高。在980 nm激发下，这些荧光粉表现出显著的近红外发射，近红外发射与总可见光发射的积分强度百分比高达99.88%。通过引入优异的近红外发射特性，在473 K时获得了高S-A值1.7351 K-1。此外，非热耦合能级的S-A值高于热耦合能级。这些结果表明，这种UC材料可能是近红外成像和温度检测应用的候选材料。(C) 2019 Elsevier B.V.版权所有
Research on near-infrared (NIR) emission of Tm3+ and Yb3+ co-doped upconversion (UC) materials has accepted many interests owing to delightful features for frontier applications. In this work, we focus on the preparation of pure NIR emission and the improvement of absolute sensitivity (S-A) on temperature in Tm3+ and Yb3+ co-doped novel double perovskite Gd2ZnTiO6 (GZT) phosphors. Upon 980 nm excitation, these phosphors perform dramatical NIR emissions, and the integral intensity percentage of NIR emission versus total visible emissions reaches up to 99.88%. A high S-A value with 1.7351 K-1 at 473 K for the I-801/I-650 is obtained via introducing excellent NIR emission. Besides, the S-A value of non-thermally coupled levels is higher than that of thermally coupled levels. These results suggest that this kind of UC material may be a candidate for NIR imaging and temperature detection applications. (C) 2019 Elsevier B.V. All rights reserved.