S,N-Heteropentacene-based molecular donor–acceptor dyads: structure–property relationships and application in single-material organic solar cells

Abstract

Functionalized S,N-heteropentacenes SN5′ were used as central donor units in molecular donor–acceptor dyads and were covalently linked to fullerenic acceptor units via flexible linkers. Systematically varied structural motifs and characterization of their optoelectronic properties resulted in structure–property relationships and allowed for their application in solution-processed single-material organic solar cells, in which power conversion efficiencies of up to 2.8% were achieved.