Anti-dimerization 56π-electron fullerene adduct bearing bulky functional groups for inverted perovskite solar cells with enhanced interfacial stability.

ABSTRACT: Solution-processible fullerene derivatives have been extensively used as electron transport layers (ETLs) of inverted perovskite solar cells (PSCs); however, the commonly used 58π-electron [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) often tends to dimerize, especially under continuous illumination, severely compromising long-term stability. Herein, we develop a 1,4-unsymmetrical addition strategy and synthesize two novel 56π-electron fullerene derivatives bearing multiple bulky functional groups such as tert-butyl, indole and azaindole, designated as C₆₀-TFB and C₆₀-TFP, which not only play the role of anti-dimerization but also leverage a combined passivating effect of various heteroatom-containing functional groups. These groups establish rob

SUBMITTER: Wang X 

PROVIDER: S-EPMC12696875 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature