Photovoltaic Devices: Electron‐Beam‐Evaporated Nickel Oxide Hole Transport Layers for Perovskite‐Based Photovoltaics (Adv. Energy Mater. 12/2019)

High-quality inorganic charge extraction layers are of key importance for efficient and stable perovskite-based photovoltaics. In article number 1802995, Tobias Abzieher, Ulrich W. Paetzold, and co-workers introduce oxygen-assisted electron beam evaporation of NiOx as a promising approach for the fabrication of highly transparent hole transport layers. By integrating these layers in inkjet-printed and all-evaporated perovskite solar cells, record PCEs are achieved.