Fig. 2: Properties of perovskite films.

a XRD patterns of perovskite films on PyAA, PyAA-Br, PyAA-Me, PyAA-MeO, and ITO. b SEM images of perovskite films deposited on different SAMs. The scale bar is 400 nm. c UV-vis spectra of perovskite films deposited on different SAMs.