Fig. 2From: Enhanced performance of CH3NH3PbI3−x Cl x perovskite solar cells by CH3NH3I modification of TiO2-perovskite layer interface(Color online) a X-ray diffraction (XRD) patterns of CH3NH3PbI3−x Cl x perovskite layer. b Detail XRD information of CH3NH3PbI3−x Cl x from 13° to 15°. The perovskite was deposited on meso-TiO2 modified by CH3NH3I solutions with different concentrationsBack to article page