Fig. 5
From: Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH4SCN
a XRD patterns of perovskite-w/o-NH4SCN films and perovskite-NH4SCN films. b Magnified XRD patterns at a range of 12–15°. c dark I-V curves for electron-only devices based on different perovskite films (inset: configuration of electron-only devices). d Dark I-V curves for hole-only devices based on different perovskite films (inset: configuration of hole-only devices)