Effect of B2O3/SiO2 ratio on photoluminescence properties and stability of red-emitting CsPb(Br/I)3 borosilicate quantum dots glass

Abstract

In recent years, inorganic perovskite quantum dots (PQDs) have garnered significant attention, but the photoluminescence (PL) properties and stability of red-emitting PQDs need to be further enhanced. In this work, the precipitation of CsPb(Br/I)₃ quantum dots into borosilicate glass was effectively enabled by the high-temperature melt-quenching method. With the B₂O₃/SiO₂ ratio increased, the glass network structure gradually loosened, which enhanced the precipitation of PQDs. Simultaneously, the PL intensity of CsPb(Br/I)₃ PQDs glass increased, with a near twentyfold rise in the photoluminescence quantum yield (PLQY). The variable temperature test of PQDs glass shows that PQDs glass has good thermal stability. Finally, a red-emitting LED and a WLED were prepared by using the prepared red-emitting CsPb(Br/I)₃ PQDs glass. This paper serves as a reference for incorporating red-emitting CsPb(Br/I)₃ PQDs glass into WLED development.