Fig. 2From: Multilevel Resistive Switching Memory Based on a CH3NH3PbI 3−xClx Film with Potassium Chloride Additivesa XRD spectrum of the as-prepared KCl-doped MAPIC films on the ITO-coated glass substrate. ⋆ represents peaks of the ITO/glass substrate. b XPS wide spectrum of the perovskite films. The inset displays the core-level XPS spectrum of K. c The top-view and d the cross-section SEM images of KCl-MAPIC layers formed on the ITO/glass substrateBack to article page