Preparation of F/Mn-Doped Cspb(Br/Cl)3 Quantum-Dot Glass and Their Luminescence Properties

：All inorganic lead halide cesium perovskite quantum dots(QDs) has attracted much attention due to its excellent luminescence properties, but further development is restricted by its stability and the existence of toxic element lead. In this paper, F/Mn- doped CsPb(Br/Cl) 3 QDs glass was prepared by melt quenching and heat treatment, it effectively reduces Pb content. The result shows that the spectrum of the quantum dot glass was adjustable between 450 nm to 515.4 nm by changing the feeding ratio of Mn-Pb ion and heat treatment temperature. Moreover, the introduction of Mn 2+ effectively improves the PLQY of CsPb(Br/Cl) 3 QDs glass and serves as a red-emitting. The prepared composites not only maintain good fluorescence characteristics, but also greatly improve the stability of quantum dots. Based on these advantages, the red-emitting perovskite quantum dot glass is expected to become a promising candidate for the high-power lighting material.