Synthesis of Highly Luminescent CsPbCl₃ Perovskite Nanocrystals with Oleylammonium Chloride as an Alternative Halide Source

Cesium lead chloride, CsPbCl3, perovskite nanocrystals emitting pure blue colour at 405 nm were synthesized by employing oleylammonium chloride salt as an alternative halide source injected to a solution containing lead and cesium precursors with alkyl ligands. The synthetic parameters/conditions and purification method were modified to improve their photoluminescence quantum yields (PLQYs). PLQY was increased by increasing oleylammonium chloride concentration relative to lead ion concentration. PLQY of 60% was achieved by optimizing these parameters. The synthesized NCs indicated prolonged stability, i.e. maintaining the maximum PLQY for at least 8 days under ambient condition.