Fig. 3

Morphology and crystallinity of the Q-2D perovskite films. SEM images of Q-2D perovskite films on: a PEDOT:PSS and b BrB-PEDOT:PSS (the scale bar is 4 μm). GIWAXS scatting pattern of Q-2D perovskite films on: c PEDOT:PSS and d BrB-PEDOT:PSS