Sm2O3-doped all-inorganic perovskite nanocrystalline glass induces self-crystallization of CsPbBr3 nanocrystals and is used in WLEDs

Abstract

All-inorganic perovskite quantum dots (QDs) in glass materials, specifically CsPbX3 (X = Cl, Br, I), are being considered as the next-generation fluorescent materials due to their impressive luminous performance and stability. However, the crystallization process of quantum dots within the glass presents uncontrollable challenge, leading to uneven crystallinity and subsequent reductions in light efficiency, thereby affecting practical applications. In glass ceramics doped with rare-earth oxides, the introduction of rare-earth ions as nucleating agents can promote the self-precipitation of nanocrystalline crystals within the glass. Building upon this principle, we have doped rare-earth ions into borosilicate glass for the first time to induce the self-crystallization of CsPbBr3 QDs. This approach effectively enhances the equilibrium distribution of quantum dots within the glass, resulting in a significant improvement in luminosity. Furthermore, the luminescence spectrum range of quantum dot-shaped luminescent glass materials can be finely tuned through rare-earth ion doping. This finding holds both theoretical and practical significance for their application in the field of lighting.