Controllable and facile synthesis of CsPbBr3-Cs4PbBr6 perovskite composites in pure polar solvent.

Graphical abstract The high quality CsPbBr 3 -Cs 4 PbBr 6 perovskite composites solids were synthesized by a single atomic supersaturated recrystallization method. Abstract Here, we present a single atomic supersaturated recrystallization method to synthesize the green-emitting CsPbBr 3 -Cs 4 PbBr 6 perovskite composites in solid state with the highest PLQY of 40.8% in pure polar solvent. The component, morphology, and optical properties of the microcrystals can be tuned by varying growth time, the content of ammonium bromide, and bromine source. The developed method provides a new route to large-scale synthesize high quality perovskite composites emitters for light-emitting diodes. [ABSTRACT FROM AUTHOR]