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Evolution of normalized PL emission spectra from MAPb(Br0.4I0.6)3thin films at 295 K under successive continuous-wave excitation intensities of 5, 50, 5, 300, and 5 W cm-2at 532 nm. These conditions correspond to approximate steady-state charge-carrier densities of 2.4 x 1015, 1.6 x 1016, 2.4 x 1015, 5.2 x 1016, and 2.4 x 1015cm-3, respectively (see SectionS2.1, Supporting Information). The dashed black-and-white lines indicate the transitions between the different excitation intensities. The individual PL spectra were normalized against their own maximum intensity within the range 1.511.98 eV.

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