Transparent perovskite glass-ceramics for visual optical thermometry

Abstract 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 realize the detection of temperature change, however, its poor high temperature thermal stability and the facile realization to obtain the production remains 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 sensing. 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.