Figure 1

(a) Device schematic diagram of our proposed CH3NH3PbI3 cell, (b) cyclic voltammograms of NGNOR, and (c) energy levels diagram with NGONR hole extraction layer.
(a) Device schematic diagram of our proposed CH3NH3PbI3 cell, (b) cyclic voltammograms of NGNOR, and (c) energy levels diagram with NGONR hole extraction layer.