Efficient CH₃NH₃PbI₃ Perovskite Solar Cells Employing Nanostructured p‐Type NiO Electrode Formed by a Pulsed Laser Deposition

Highly transparent and nanostructured nickel oxide (NiO) films through pulsed laser deposition are introduced for efficient CH3 NH3 PbI3 perovskite solar cells. The (111)-oriented nanostructured NiO film plays a key role in extracting holes and preventing electron leakage as hole transporting material. The champion device exhibits a power conversion efficiency of 17.3% with a very high fill factor of 0.813.