Extended Data Fig. 3: Morphological characteristics.
From: Tautomeric mixture coordination enables efficient lead-free perovskite LEDs
a, b, SEM images of the perovskite films without (a) and with 5% CA (b). c, d, AFM images of the pristine (c) and the 5% CA-treated sample (d). e, KPFM measurements for the pristine and the CA-treated sample. f, Linear potential profiles for the pristine and the CA-treated sample.
