Precipitation and tunable emission of cesium lead halide perovskites (CsPbX3, X = Br, I) QDs in borosilicate glass

In prior work, fully inorganic perovskite nanocrystals of cesium lead halide (CsPbX3, X = Cl, Br, I), representing bright and tunable photoluminescence, have been synthesized using hot-inject approach and anion exchange reaction. Regrettably, the air instability and poor water resistant properties still hindered its application owing to their extremely fast reaction kinetics and easy anion exchange. Herein, we report a facile melting quenching technique of CsPbX3 (X = Br, I) quantum dots (QDs) glass, and it also shows a tunable photoluminescence (520-698 nm) controlled by the molar ratios of halide precursors. This melting quenching CsPbX3 QDs glass exhibits high luminescent intensity, narrow photoluminescence (PL) emission, including the similar bandgap energies as CsPbX3 QDs solution. The chemical stability and tunable emission make perovskite QDs glass appealing for lighting display, particularly for warm lighting source, which realize the application of solid-state lighting for CsPbX3 QDs.