Extracting disorder parameters from optical spectra of non-fullerene acceptors.

ABSTRACT: Organic solar cells have seen significant advancements through the use of non-fullerene acceptors, yet understanding the impact of molecular design on energetic disorder remains critical for optimizing material performance. In this work, we investigate three methodologies for quantifying static and dynamic excitonic disorder by analysing the temperature dependence of spectral features in thin film absorption and photoluminescence spectra. Our results demonstrate that fitting the temperature dependence of the first emission peak energy is the most reliable approach for assessing static disorder, while linewidth fitting of absorption spectra is best suited for quantifying dynamic disorder. Comparative case studies reveal that linear n-octyl side chains (e.g., in O-IDTBR and IDI

SUBMITTER: Frederix S 

PROVIDER: S-EPMC12231089 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature