Small Molecule BODIPY Dyes as non-Fullerene Acceptors in Bulk Heterojunction Organic Photovoltaics

A series of acceptor–donor–acceptor molecules containing terminal BODIPY moieties conjugated through the meso position were synthesized. Deep LUMO energy levels and good visible absorption led to their use as acceptors in bulk heterojunction solar cells. Inverted devices were fabricated, reaching efficiencies as high as 1.51%.