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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

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Abstract

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 M0.5Bi2.5Nb2O9 (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 ΔRt = 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.

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

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Supplementary files

Article information


Submitted
15 Aug 2020
Accepted
01 Oct 2020
First published
02 Oct 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

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

X. Li, L. Guan, Y. Li, H. Sun, Q. Zhang and X. Hao, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC03894F

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