Fig. 1
From: Excited-state vibrational dynamics toward the polaron in methylammonium lead iodide perovskite
Transient excited state absorption spectrum shown in the 830–940 nm region of MAPbI3 perovskite excited by a ~40 fs FWHM pulse at 560 nm. a Contour plot of excited state absorption band centered at ~855 nm. b–d Time profiles measured at 840–855 (blue), 860–875 (green), and 885–900 nm (red) fit to the sum of two exponentials with the indicated constants. The residual profiles are also shown revealing underlying oscillations especially in the 840−855 and 885−900 nm regions
