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

Abstract

AbstractDue 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(Pb0.7Sb0.3)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(Pb0.875Sb0.125)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.