CsPb(Br,I)3 embedded glass: Fabrication, tunable luminescence, improved stability and wide-color gamut LCD application

All-inorganic cesium lead halide perovskites with high quantum efficiency and narrow emission bandwidth has emerged as a new-generation color converter for wide-color-gamut LCD. Herein, we present the fabrication of this kind of material in a green, time-saving, low cost, and batched way, following the phase transformation from amorphous to crystalline via glass self-crystallization or thermally-/mechanically-driven glass crystallization. A close insight was put into the microstructure-property relationship by making comparison on the samples via different crystallization routes. The CsPbBr3 in glass yields quantum efficiency of similar to 48% and emission bandwidth of similar to 30 nm. The color-tunable emission is facilely realized with the introduction of I- species, based on a solid solution approach. It was demonstrated that the tough issue of poor thermal-/photo-/moisture-stability in perovskites can be well addressed, thanking to the encapsulation of water- and oxygen-impermeable glass matrix. Moreover, a prototype w-LED was fabricated by coupling the CsPbBr3 devitrified glass, the K2SiF6:Mn4+ phosphor-in-glass, with the commercial InGaN blue chip, producing an ultra-wide color gamut of 103.1% NTSC after passing through the commercial RGB color fillers.