Fig. 3: Local changes in perovskite films under illumination.
From: Plasmon-induced trap filling at grain boundaries in perovskite solar cells
a PL mappings of MAPbI3 films measured under 532 nm excitation. Control: PAT-treated MAPbI3. Target: Au@PAT-modified MAPbI3. b Normalized PL line scans across GBs of the control and target MAPbI3 films in an average of four random places (labeled in Fig. 3a). c PLQY of the pristine (black), control (blue), and target (red) MAPbI3 films in an average of five samples of each type. d Topography and CPD spatial maps of control and target perovskite films characterized by KPFM over an area of 4 µm2 under illuminated and dark states. e SNOM optical images showing the near-field distribution profiles of control and target perovskite films, under illumination by a 532 nm laser
