Perovskite nanocrystal-embedded glasses for photonic applications

Perovskite nanocrystals (PNCs) based on cesium lead halide CsPbX3 (X = Cl, Br, I) have rapidly emerged as one of the most promising photonic materials in recent years due to their characteristic high quantum efficiency and narrow emission bandwidth. However, their poor stability against external influences such as moisture, oxygen, heat, and light irradiation has hindered their practical photonic applications in light-emitting diodes, displays, and photovoltaic cells. Among various attempts to overcome their shortcomings, an inorganic glass matrix can be an effective and practical solution, providing chemically stable encapsulation of the PNCs. Significant improvements in chemical, thermal, and photo-stabilities compared with the colloidal PNCs have been reported, without degrading their unique optical properties. Perovskite nanocrystal-embedded glasses (PNEGs) can be fabricated using conventional melt-quenching methods followed by heat treatment. Various combinations of glass and PNC compositions have been reported, demonstrating practical feasibility in various photonic applications.