Solar RRL, Journal Year: 2025, Volume and Issue: unknown
Published: June 4, 2025
As the foremost electron transport material in inverted perovskite solar cells, phenyl‐C61‐butyric acid methyl ester (PCBM) is constrained by its inadequate electrical properties and defect passivation capability to fabricate devices with better performance. Herein, a non‐fullerene acceptor molecule eC9‐2Cl introduced into PCBM, which simultaneously passivates defects distributed on surface, enhances of provides additional near‐infrared absorption. The strategic incorporation optimizes band alignment increases mobility. Furthermore, electron‐deficient thiophene carbonyl moieties effectively passivate uncoordinated Pb 2+ defects. eC9‐2Cl‐doped PCBM showed an increased open‐circuit voltage ( V OC ) 1.12 V, attaining champion power conversion efficiency (PCE) 24.40% narrow distribution. Moreover, modified demonstrate exceptional retention 96% initial PCE after storing under ambient air for over 1800 h. This can be attributed enhanced uniformity, passivation, augmented hydrophobicity introduction.
Language: Английский