Fig. 4: Time-resolved photoluminescence analysis.
a Time-resolved photoluminescence traces of the perovskite film recorded after wet-air passivation in (open green circles) and out (full blue circles) of the cavity. Laser response in the first 10ns (red-dotted lines) and simulation curves (red continuous lines) are also reported. b Time-resolved photoluminescence traces of the perovskite film recorded in vacuum in (open green circles) and out (full blue circles) the cavity. NT and n0 stand for trap density and photogenerated carrier density (6 × 1015 cm−3), respectively. P is the Purcell factor. c Scheme of the processes involved in the spontaneous emission according to the rate equation system (see Supplementary Note 9). ET is the trap energy; kT (kDT) is the trapping (detrapping) coefficient usually related to electrons traps; Br is the bimolecular radiative band-to-band free carriers recombination coefficient; kT (kDT) is the exciton gemination (dissociation) rate; Ar is the excitons monomolecular radiative recombination rate; hν is the energy of emitted photons.
