One Hundred‐Nanometer‐Sized CsPbBr₃/m‐SiO₂ Composites Prepared via Molten‐Salts Synthesis are Optimal Green Phosphors for LCD Display Devices

Abstract The exploitation of the optimal optical properties lead halide perovskite nanocrystals in optoelectronic devices is mainly hindered by low stability such materials. Here, a molten‐salts approach developed to encapsulate CsPbBr 3 (together with KNO , NaNO and KBr inorganic salts) inside different nanoscale mesoporous SiO 2 host matrices, having sizes between 100 300 nm. comparison products, including previously reported ≥600‐nm‐sized /m‐SiO composite, indicates that 100‐nm‐sized particles feature best against humidity, light irradiation heat, exhibit green (peaked at 517 nm) narrow photoluminescence (full width half maximum 18 high quantum yield (77%). Such make these composite phosphors for down conversion liquid crystal displays (LCDs). Indeed, authors demonstrate proof‐of‐concept 7‐in. LCD which color layer polymer film loaded particles, features an white emission (with correlated temperature 6861 K), close reference point NTSC, covers 92% NTSC standard gamut area CIE1931, higher than commercial (Dell XPS 15 7590 laptop).