Enhanced Dual-Emissive Circularly Polarized Luminescence of Mn2+-Doped 2D Lead Halide Perovskite Nanosheets Via l-Cysteine Modification.
Mn2+-doped two-dimensional (2D) (PEA)2PbBr4 (PEA = phenethylammonium) nanosheets were synthesized and modified with chiral l-cysteine by room-temperature antisolvent recrystallization. Under 365 nm excitation, the optimized material exhibits dual-color photoluminescence (PL), comprising host excitonic emission at 410 n...