Upconversion fluorescence property of Er3+/Yb3+ codoped lanthanum titanate microcrystals for optical thermometry
Upconversion fluorescence property of Er3+/Yb3+ codoped lanthanum titanate microcrystals for optical thermometry
复制标题
Er3/Yb3共掺杂钛酸镧微晶光学测温上转换荧光特性
DOI：
10.1016/j.jallcom.2019.153449
复制
发表时间：
2020-05-05
影响因子：
6.2
通讯作者：
Xu, Shiqing
中科院分区：
文献类型：
--
作者：
Liu, Yuan;Bai, Gongxun;Xu, Shiqing
光学测温技术以其灵敏、非接触、可靠等无可比拟的特性，在许多领域发挥着重要的作用。本文采用固相反应法制备了Er3+/Yb3+共掺钛酸镧(La2Ti2O7)微晶，用于光学测温。这种新制备的测温材料是基于980 nm激发下上转换发射的热耦合能级的荧光强度比。测温灵敏度为5.7×10~(-3)K~(-1)，输入功率密度仅为8.3 mW/mm~(2)。重复性测试结果表明，所制备的La2Ti2O7微晶在333~553K温度范围内具有良好的稳定性。因此，Er3+/Yb3+共掺La2Ti2O7微晶的这些优点使其在光学测温领域具有广阔的应用前景。(C)2019爱思唯尔B.V.保留所有权利。
Optical thermometry technology plays a significant role in plenty of fields owing to its unrivaled properties such as sensitive, noncontact, reliable and so on. In this work, Er3+/Yb3+ codoped lanthanum titanate (La2Ti2O7) microcrystals have been synthesized by solid state reaction for optical thermometry. This novel prepared material for thermometry is based on the fluorescence intensity ratio of thermally coupled levels from upconversion emission under 980 nm excitation. The sensitivity of thermometry is 5.7 x 10(-3) K-1, and the input power density is only 8.3 mW/mm(2). Furthermore, the result of repeatability test illustrates that the as-prepared microcrystals possess excellent stability at the temperature range from 333 to 553 K. Therefore, these demonstrated advantages of Er3+/Yb3+ codoped La2Ti2O7 micro-crystals make it a promising material in optical thermometry area. (C) 2019 Elsevier B.V. All rights reserved.