Fluorinated Fullerene Derivatives for Thermally Stable Perovskite Solar Cells.
PCBM (phenyl-C61-butyric acid methyl ester) is one of the most used electron transport layers (ETLs) in perovskite solar cells (PSCs). However, PCBM tends to self-aggregate during the thermal aging process, disrupting film continuity and limiting device lifetime. To address this issue, we synthesized new fluorinated ph...