Fig. 5: Ultrafast carrier transfer and recombination dynamics in quasi-2D perovskite thin films by TA measurements.
From: Pulse-doubling perovskite nanowire lasers enabled by phonon-assisted multistep energy funneling
a 2D pseudo-color plot of the obtained broadband TA spectra in between 50 fs to 7600 ps subsequent to 400 nm excitation at the pump fluence of 0.29 μJ cm−2. b TA spectra at selected timescales under pump fluence of 0.29 μJ cm−2. c TA kinetics traces probed at different wavelengths of 435, 466 and 508 nm, respectively. d TA kinetics probed at the excitonic photobleaching peak (at 436 nm) of low-dimensional (n = 2) QWs under different pump fluences
