Fig. 1: Molecular structures and physicochemical properties of PSMAs.

a Molecular structures (blue color alkyl chains are the branched upper side chains, and red color difluorothiophene is the modified linking unit) of PY-IT, PY-IT2F, PG-IT, and PG-IT2F. b Absorption spectra of the PSMAs films. c Energy level diagram of the PSMAs and PM6 donor. Source data are provided as a Source Data file.