Twisted-graphene-like perylene diimide with dangling functional chromophores as tunable small-molecule acceptors in binary-blend active layers of organic photovoltaics

This study presents the synthesis of small-molecule acceptors having the structure A–D–A′–D–A—where A, A′, and D represent the end group, the core and π-bridge unit, respectively—that form the active layers with the polymer PM6 for organic photovoltaics.