Robust, Brighter Red Emission from CsPbI Perovskite Nanocrystals via Endotaxial Protection.

Increasing the stability of lead halide perovskites (LHPs) is required for integrating them into light-emitting devices. To date, most studies toward this direction have primarily concentrated on improving the chemical stability of green-emitting LHPs. In this work, red-emitting CsPbI-CsPbI hybrid nanocrystals (NCs) were synthesized with a high photoluminescence (PL) quantum yield of ∼90%.