Fig. 2: Characterization of perovskite layers formed by bathing in various antisolvent.

a XRD spectra of perovskite films obtained by bathing in various antisolvents. b SEM image of the perovskite film made by bathing in tBuOH:EA. c Grain size distribution curves for perovskite films fabricated with various antisolvents. d Champion PCE of PSCs fabricated by bathing in various antisolvents.