Ultra‐Stable and Highly Efficient White Light Emitting Diodes through CsPbBr₃ Perovskite Nanocrystals−Silica Composite Phosphor Functionalized with Surface Phenyl Molecules (Small 7/2023)

White Light Emitting Diodes of Perovskites In article number 2206311, Kyoungja Woo and co-workers present the white light emitting diodes (LEDs) incorporating CsPbBr3 NCs–SiO2Ph phosphor, which exhibit unprecedented stability and high efficiency during continuous operation. The high stability and performance originate from grain growth and striking photoluminescence-enhancement, upon thermal curing/aging, of the NCs encapsulated in a compact silica matrix, which is impermeable to H2O but permeable to O2. The synthesis strategy herein provides a realistic pathway toward perovskite NC-based phosphors for practical applications.