Figure 2

Scanning electron micrographs before and after thermal ageing at 85 °C for 4 hrs of pure MAPbI3 n = ∞ (a,d), mixed dimensional n = 60 (b,e) and n = 40 (c,f) perovskite thin films.

Scanning electron micrographs before and after thermal ageing at 85 °C for 4 hrs of pure MAPbI3 n = ∞ (a,d), mixed dimensional n = 60 (b,e) and n = 40 (c,f) perovskite thin films.