fig4
Figure 4. LBIC mapping of (A) the as-pressed wafer and (B) the P&C-FAPbI3 wafer. KPFM images of (C) the as-pressed wafer and (D) the P&C-FAPbI3 wafer. (E and F) The distribution of surface potential of the wafers from the KPFM. (G) Aged pictures and (H) XRD spectra of the as-pressed wafer and the P&C-FAPbI3 wafer.
