Perovskite Solar Cells: High‐Performance Perovskite Solar Cells with Excellent Humidity and Thermo‐Stability via Fluorinated Perylenediimide (Adv. Energy Mater. 18/2019)

In article 1900198, Licheng Tan, Yiwang Chen, and co-workers introduce a fluorinated perylenediimide (F-PDI) to enhance the photovoltaic performance and stability of perovskite solar cells. Conductive F-PDI effectively passivates defects and promotes charge transfer. Paralleling the Chinese traditional tale “Nvwa mending the sky”, the hydrophobic F-PDI prevents moisture penetration, and immobilizes methylamine ions by strong hydrogen bonding, which ensures excellent stability toward humidity and heat.