Electric Field Effects in MAPbI₃ Perovskite via Picosecond Microscopy Techniques

We present time-resolved kerr rotation (TRKR) and photoluminescence (PL) data exhibiting electric field effects in thin film MAPbI3 (MAPI) perovskite. These data were recorded using a unique picosecond microscopy technique, with a spatial resolution of 2 microns and temporal resolution of 1 picosecond. Results show that upon application of electric fields on the order of 10^6 V/m, the amplitude of the PL decreases linearly with the applied field up to a reduction of at least 20%. Additionally, the measured lifetime T2* of the quantum beating signal in MAPI decreases by at least 33% under the influence of an applied electric field. We also further elaborate on the potential mechanisms by which the electric field may lead to the measured effects.