Fig. 2: Photoluminescence (PL) properties of 2D (PEA)2(MA)Sn2I7 and (PEA)2(MA)Pb2I7.
From: Robust excitonic light emission in 2D tin halide perovskites by weak excited state polaronic effect
a Photoluminescence quantum yield (PLQY) as a function of excitation power. b Schematic of recombination for excitons and free carriers with monomolecular- and bimolecular-like behavior, respectively. c PL (black circles) and transient absorption (TA, red squares) kinetics of (PEA)2(MA)Sn2I7 thin flake. d TRPL0 as a function of laser power density for (PEA)2(MA)Sn2I7 and (PEA)2(MA)Pb2I7 at 300 K and 80 K, which are extracted from TRPL results in Supplementary Fig. 4. The corresponding power law fitting are shown with a power factor \(\beta\) value listed. The values of \({{{\rm{TRPL}}}}_{0}\) have been vertically shifted for clarity.
