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TRPL decay curve excited at 375 nm monitoring 532 nm emission of (a) (PEA)2PbI4 and (c) (BA)2PbI4 and 577 nm emission of (b) (PEA)2MAPb2I7 and (d) (BA)2MAPb2I7 crystals. The fits are shown with red lines while the insets correspond to longer time scales.
