期刊
JOURNAL OF RARE EARTHS
卷 39, 期 6, 页码 712-717出版社
ELSEVIER
DOI: 10.1016/j.jre.2020.05.009
关键词
CsPbI3 quantum dots; Thermometry; Thermal stability; Visual change; Rare earths
The study proposes a method of growing Tb3+-doped CsPbI3 QDs in borosilicate glass to achieve excellent temperature sensing performance. The new material has high temperature stability and high-efficiency fluorescence output, achieving higher temperature sensitivity and color change.
Optical thermometers have aroused considerable attention in recent years, and the increasing demand of sensitivity for practical application encourages the investigation on developing innovative non-contact optical thermometric materials with higher sensitivity and accuracy. Perovskite quantum dots (QDs) with excellent temperature-dependence optical properties, provide a feasible approach to realizing the detection of temperature change, however, their poor high temperature thermal stability and the facile realization to obtain the production remain a daunting challenge. Herein, growing Tb3+-doped CsPbI3 QDs in situ in borosilicate glass is proposed, which ensures the phase stability, and high-efficiency florescence output of the all-inorganic perovskite as a temperature sensor. A higher absolute and relative temperature sensitivity (0.0398 K-1 and 7.12%/K, respectively), along with the visible color change from orange-red to yellow-green with the increase of temperature is accomplished. Notably, the repeatable florescence intensity of Tb3+-doped CsPbI3 QDs under high temperature enables their temperature sensing application. (C) 2020 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.
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