13% Single‐Component Organic Solar Cells based on Double‐Cable Conjugated Polymers with Pendent Y‐Series Acceptors

Abstract Double‐cable conjugated polymers with pendent electron acceptors, including fullerene, rylene diimides, and nonfused acceptors, have been developed for application in single‐component organic solar cells (SCOSCs) with efficiencies approaching 10%. In this work, Y‐series electron acceptors have been firstly incorporated into double‐cable polymers in order to further improve the efficiencies of SCOSCs. A highly crystalline Y‐series acceptor based on quinoxaline core and the random copolymerized strategy are used to optimize the ambipolar charge transport and the nanophase separation of the double‐cable polymers. As a result, an efficiency of 13.02% is obtained in the random double‐cable polymer, representing the highest performance in SCOSCs, while the regular double‐cable polymer only provides a low efficiency of 2.75%. The significantly enhanced efficiencies are attributed to higher charge carrier mobilities, better ordering conjugated backbones and Y‐series acceptors in random double‐cable polymers.