CsPbBr₃/Cs₄PbBr₆ Quantum Dots in Rigid Lithium Disilicate Glass Ceramics for Lighting and Displays

Abstract

Zero-dimensional quantum dots (QDs) with formulas of Cs 4 PbX 6 and CsPbX 3 (X = I, Br, Cl) have emerged in recent years for next-generation functional materials in optoelectronics fields. However, CsPbX 3 and Cs 4 PbX 6 QDs are unstable when separated from colloidal solution, still less enduring thermal and water attack. Herein, lithium disilicate glass ceramics, a fantastic dental restorative material with excellent mechanical properties and good semitransparency, have been used as the rigid armor to keep CsPbBr 3 /Cs 4 PbBr 6 QDs away from destructive environmental influences. Notably, lithium disilicate glass ceramics can effectively prevent the aggregation and further growth of QDs even at a high calcination temperature (600 °C), while the average particle sizes of the QDs in lithium disilicate glass ceramic are only ∼3.3 nm. The CsPbBr 3 /Cs 4 PbBr 6 quantum dot glass microcrystalline prepared at 600 °C exhibits intense green emission at ∼520 nm with a greatly enhanced emission intensity of ∼5.1 times that of the sample prepared at 500 °C. Interestingly, the abnormal luminescence enhancement (∼195%) appeared after the as-prepared CsPbBr 3 /Cs 4 PbBr 6 quantum dot glass microcrystalline was immersed in water for 72 h. The ultrastable CsPbBr 3 /Cs 4 PbBr 6 QDs glass microcrystalline exhibits great potential in lighting and displays fields similar to traditional inorganic phosphors.

Excited State Regulated Emission in Hybrid Indium Halides via Crystal Structure Switch

“…Organic–inorganic hybrid metal halides due to rich optoelectronic properties have attracted extensive research, particularly in the fields of solid-state lighting, , scintillators, − photodetectors, etc. , Pb-based perovskites have attracted attention due to their excellent emission characteristics and high photoluminescence quantum yield (PLQY). − However, their intrinsic thermal instability and toxicity have limited practical applications. To address these issues, various metal cations have been used to replace Pb 2+ to reduce the toxicity of materials.…”