Abstract
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.
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