A Twisted Dimeric Perylene Diimide Electron Acceptor for Efficient Organic Solar Cells

A novel solution-processable twisted dimeric perylene diimide (IDT-2PDI) with a bulky fused-ring indacenodithiophene as a bridge is developed as an electron acceptor for organic solar cells (OSCs). Poly(3-hexylthiophene) (P3HT):IDT-2PDI based OSCs have power conversion efficiencies (PCEs) up to 2.61% with a high fill factor of 0.668, and benzodithiophene-diketopyrrolopyrrole (BDT-2DPP):IDT-2PDI based OSCs exhibit a promising PCE of 3.12%.