Influences of Mn2+/Eu3+ dopants on the microstructures and optical properties of glass-embedded CsPbBr3 quantum dots

Abstract

All inorganic CsPbX3 (X = Cl, Br, I) perovskite quantum dots (PQDs) exhibit excellent photoelectric properties, such as high photoluminescence quantum yield, exceptional defect tolerance, and a long carrier diffusion length. However, their poor stability limits their applications. In this study, CsPbBr3 PQDs were precipitated in a phosphate glass matrix by a melt quenching method. The influences of Mn2+ and Eu3+ dopants on the microstructure and optical properties of CsPbBr3 PQDs glass were investigated in detail. The DSC and XRD results reveal that Mn2+/Eu3+ can act as a nucleating agent to promote the precipitation of CsPbBr3 PQDs in the glass matrix and optimize its microstructure. Simultaneously, PL spectra shows that appropriate Mn2+/Eu3+ doping concentration can enhance the optical performance of CsPbBr3 PQDs glass. The luminescence intensity increases by 46.9% and 44.3%, respectively, with the additions of these dopants. Finally, Mn2+ and Eu3+ single-doped CsPbBr3 PQDs glass is proved to have excellent broadband UV spectral response characteristics, indicating its potential application for photoelectric detection.