Optical control of Er3+-doped M0.5Bi2.5Nb2O9 (M = Li, Na, K) materials for thermal stability and temperature sensing using photochromic reactions,Journal of Materials Chemistry C

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Optical control of Er3+-doped M0.5Bi2.5Nb2O9 (M = Li, Na, K) materials for thermal stability and temperature sensing using photochromic reactions
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-10-02 , DOI: 10.1039/d0tc03894f
Xuefeng Li _{1,

2,

3,

4,

5} , Lili Guan _{1,

2,

3,

4,

5} , Yong Li _{1,

2,

3,

4,

5} , Haiqin Sun _{1,

2,

3,

4,

5} , Qiwei Zhang _{1,

2,

3,

4,

5} , Xihong Hao _{1,

2,

3,

4,

5}

Affiliation

Currently, the conventional ways to enhance thermal stability or temperature-sensing properties are mainly by modulating host lattices and dopant composition. Here, we found that the photochromic reaction based on defect-capture engineering plays an important role in improving thermal stability and temperature-sensing properties. In this work, the photochromic behavior induced by oxygen vacancy-related defects were successfully achieved in a series of Er³⁺-doped M_0.5Bi_2.5Nb₂O₉ (M = Li, Na, K) materials. After 405 nm irradiation, the intensity of the upconversion emission was significantly decreased, and the quenching degree reached up to ΔR_t = 80.46%, 91.41%, and 55.29%, respectively. Meanwhile, the thermal stability of luminescent emission improved remarkably in a temperature range from 273 to 753 K, and up to 59.29% (KBN), 72.55% (NBN), and 44.60% (LBN) after the 405 nm light irradiation. Importantly, the optical temperature-sensing exhibited an obvious modification using different temperature response of upconversion emission before and after light irradiation, strongly relying on the photochromic reaction. These results might provide a good strategy for achieving high thermal stability and temperature-sensing performance by controlling the photochromic reactions.

中文翻译：

掺Er3 +的M0.5Bi2.5Nb2O9（M = Li，Na，K）材料的光学控制，用于通过光致变色反应进行热稳定性和温度感测

当前，增强热稳定性或温度感测特性的常规方法主要是通过调节主体晶格和掺杂剂组成。在这里，我们发现基于缺陷捕获工程的光致变色反应在改善热稳定性和温度感测特性方面起着重要作用。在这项工作中，由氧空位相关缺陷引起的光致变色行为在一系列掺Er ^3+的M _0.5 Bi _2.5 Nb ₂ O ₉（M = Li，Na，K）材料中成功实现。405 nm辐照后，上转换发射的强度明显降低，猝灭度达到ΔR _t分别为80.46％，91.41％和55.29％。同时，在从273到753 K的温度范围内，以及在405 nm光照射后高达59.29％（KBN），72.55％（NBN）和44.60％（LBN）的温度下，发光的热稳定性显着提高。重要的是，在光照射之前和之后，利用上转换发射的不同温度响应，光学温度感测表现出明显的改变，这强烈依赖于光致变色反应。这些结果可能为通过控制光致变色反应实现高热稳定性和温度感应性能提供了一个很好的策略。

更新日期：2020-10-17

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