Synthesis and properties of undoped and Tb3+-doped CsPbF3 QDs-in-glasses for ultraviolet emitter and optical thermometry

In recent years, all inorganic CsPbX3 (X = F, Cl, Br, and I) perovskite quantum dots (QDs) have garnered increasing attention for their exceptional optical properties. However, the commercialization of CsPbX3 is hampered by poor environmental stability and lead toxicity. Fortunately, the strategy of incorporating CsPbX3 into microcrystalline glass effectively addresses this issue. Notably, CsPbF3 demonstrates improved phase stability and a unique electronic structure, making its exploration crucial for various applications. In this study, we synthesized CsPbF3 QDs-in-glass (QiG) and Tb3+-doped CsPbF3 QDs-in-glasses (QiGs) using melt quenching and in-situ growth methods. The CsPbF3 QiG exhibits intrinsic photoluminescence with the main peak in the ultraviolet range, while Tb3+-doped glasses show co-emission of CsPbF3 QDs and Tb3+, allowing tunable colors by adjusting Tb3+ content. We systematically studied and evaluated the application of Tb3+-doped CsPbF3 QiG as an optical temperature sensor. Importantly, the glass sample demonstrates high stability, including good thermal stability, superior high-temperature resistance, and moisture stability. This work significantly contributes to the exploration of the optical properties of CsPbF3 QiG, providing new insights into its future applications in diverse optical-related fields.