Figure 2.

(a) Time-resolved difference absorption spectra of MAPbBr₃ films which were pumped under 400 nm with intensity at 7.5 μJ cm⁻². Laser induced fluorescence was marked by dash line. (b) Fluence-dependent normalized kinetic traces of band-edge (520 nm) transition. The arrows indicate direction of increasing pump intensities ranging from 0.5 to 21.5 μJ cm⁻². (c) Lifetimes and corresponding ratios of trap-assisted and charge carrier recombination mode, the average lifetime shows decreased trend with increased pump fluences. (d) Fluence-dependent time-resolved PL measurements of MAPbBr₃ films with 405 nm pulses, trap-assisted kinetics trace was marked by dash line.