Polyacrylic acid- b -polystyrene-passivated CsPbBr 3 perovskite quantum dots with high photoluminescence quantum yield for light-emitting diodes.

We report a novel strategy for the preparation of CsPbBr 3 perovskite quantum dots by polyacrylic acid- b -polystyrene ligands, which exhibited high stability and photoluminescence quantum yields. The fabricated white light-emitting diodes exhibited luminescence performance with the colour rendering index of 65.5, and a correlated colour temperature of 5464 K.