Perovskite Solar Cells: Perovskite Solar Cells with Inorganic Electron‐ and Hole‐Transport Layers Exhibiting Long‐Term

In article number 1801010, Nam‐Gyu Park, Hyunjung Shin, and co‐workers present a perovskite solar cell (PSC) composed of fluorine‐doped tin oxide (FTO)/NiO/perovskite/[6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM)/bathocuproine (BCP)/Al:ZnO/Ag. They find that the Al:ZnO layer grown via atomic layer deposition plays a significant role in improving the stability of the PSC. The unique role of the Al:ZnO, distinguished from other types of passivation, is its impermeability, which prevents moisture penetration, as well as interdiffusion at the perovskite/Ag interface when illuminated at higher temperature (≈85 °C).