Fig. 2: Fabrication process of CsPbBr3 photoanodes with protective catalytic sheet.

a Schematic diagram describing the preparation of the catalyst-coated protection sheet made of glassy carbon and the perovskite light absorber to form photoanodes. Right bottom inset: photograph of the CsPbBr3 photoanode protected with GC/Ni/NiFeOOH. b Cross-sectional and top-view SEM micrographs of the as-prepared CsPbBr3 perovskite solar cell. c Energy band diagrams of each component in the photoanode and illustration of charge transport.