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

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(Pb0.7Sb0.3)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(Pb0.875Sb0.125)Br-3 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 degrees. 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)AlSiN3 ceramic phosphors to prepare phosphor wheels, which shows that these materials have potential application prospects in the field of display.

Automated summary

In this paper, Cs(Pb,Sb)Br-3 PQDs@glasses were successfully prepared by traditional methods. The optical characterization showed that Cs(Pb0.7Sb0.3)Br-3 PQDs@glasses have a emission peak at 518 nm and a full width at half maximum of 20 nm, with a photoluminescence quantum yield (PLQY) of 58%. The stability and potential applications of the PQDs@glass were further studied through thermal analysis and combining with ceramic phosphors.