Halide-containing zinc borosilicate glass as a matrix for CsPbBr3 crystal

The paper presents the results of studying the region of glass formation in the B₂O₃-SiO₂-ZnO-NaBr system. The used mode of glass synthesis made it possible to avoid the complete volatilization of bromine from the glass melt. For a series of samples containing 8 mol.% sodium bromide, 12 mol.% SiO₂ and variable ratio of B₂O₃ and ZnO the dependences of density and refractive index were determined. For the glass composition 60B₂O₃ – 12SiO₂ – 20ZnO – 8NaBr additionally containing PbBr and CsNO₃, in-situ crystallization of halide perovskite crystals was performed. Based on X-ray phase analysis, the formation of the CsPbBr₃ phase was established. Upon excitation at a wavelength of 405 nm, the glass-ceramic sample had a luminescence band with a maximum near a wavelength of 518 nm.