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)Br₃ PQDs@glasses were successfully prepared by traditional melting quenching and heat treatment methods. The optical characterization shows that Cs(Pb_0.7Sb_0.3)Br₃ 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_0.875Sb_0.125)Br₃ has been studied by first principles. The stable range of chemical potential of each element in CsPbBr₃ is calculated by first principles. It is proved that CsPbBr₃ 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)Br₃ PQDs@glasses are combined with AlN-(Ca,Eu)AlSiN₃ ceramic phosphors to prepare phosphor wheels, which shows that these materials have potential application prospects in the field of display.