Site-Selective Fluorination of Bathocuproine Derivatives for Enhanced Performance and Stability in Perovskite Solar Cells.

ABSTRACT: Interface engineering is vital for optimizing charge transport, stability, and overall efficiency in perovskite solar cells. In this work, two novel fluorinated bathocuproine (BCP) derivatives, BCP-m2F and BCP-m4F, are introduced, featuring site-selective monofluorination at the terminal phenyl rings. Compared to the previously reported BCP-m1, which incorporates aryl substitution for improved planarity and charge transport, these new derivatives leverage fluorination to further tailor the electronic structure and interfacial behavior. The energy-level modulation by fluorination plays only a minor role; however, fluorination significantly enhances device stability through stronger binding with C₆₀ and a pronounced surface passivation effect. Experimentally, BCP-m4F demonstrates

SUBMITTER: Tran HN 

PROVIDER: S-EPMC12703419 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature