Perovskite quantum‐dots glasses with excellent stability and optical properties for laser projection

Abstract

Due to the instability of perovskite quantum-dots (PQDs), their applications in optoelectronic devices, in reality, are limited. In this paper, Cs(Pb,Sb)Br 3 PQDs@glasses were successfully prepared by traditional melting quenching and heat treatment methods. The optical characterization shows that Cs(Pb 0.7 Sb 0.3 ) Br 3 PQDs@glasses has an emission peak of 518 nm and a full width at half maximum of 20 nm, and the photoluminescence quantum yield (PLQY) is 58%. The electronic structure of Cs(Pb 0.875 Sb 0.125 )Br 3 has been studied by first principles.The stable range of chemical potential of each element in CsPbBr 3 is calculated by first principles. It is proved that CsPbBr 3 is an excellent PQDs luminescent material. The thermal analysis and temperature-dependent photoluminescence spectra prove the stability of the PQDs@glass within 200 . The thermal distribution of the sample under laser irradiation is measured by a finite element method. In addition, Cs(Pb,Sb)Br 3 PQDs@glasses are combined with AlN-(Ca,-Eu)AlSiN 3 ceramic phosphors to prepare phosphor wheels, which shows that these materials have potential application prospects in the field of display.