Synthesis and characterization of arylenevinylenearylene–naphthalene diimide copolymers as acceptor in all–polymer solar cells. Issue 10 (8th March 2017) - Xue, Lingwei
ABSTRACT: Two n ‐type conjugated D‐A copolymers, P(TVT‐NDI) andP(FVF‐NDI) with thienylene‐vinylene‐thienylene (TVT) or furanylene‐vinylene‐furanylene (FVF) as donor (D) units and naphthalene diimide (NDI) as the acceptor (A) units, were synthesized by the Stille coupling copolymerization. The two polymers possess good solubility, high thermal stability, and broad absorption bands with absorption edges at 866 nm forP(TVT‐NDI) and 886 nm forP(FVF‐NDI) . The LUMO energy levels ofP(TVT‐NDI) andP(FVF‐NDI) are −3.80 eV and −3.76 eV respectively, so the two polymers are suitable for the application as acceptor in blending with most polymer donor in PSCs based on the energy level matching point of view. All polymer solar cells (all‐PSCs) were fabricated withP(TVT‐NDI) orP(FVF‐NDI) as acceptor and medium bandgap polymer J51 as donor for investigating the photovoltaic performance of the two n ‐type conjugated polymer acceptors. And higher power conversion efficiency of 6.43% forP(TVT‐NDI) and 5.21% forP(FVF‐NDI) was obtained. The results indicate that arylenevinylenearylene–naphthalene diimide copolymer are promising polymer acceptor for all–PSCs. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2017, 55, 1757–1764 Abstract : Two n ‐type low bandgap D‐A copolymersP(TVT‐NDI) andP(FVF‐NDI) with thienylene‐vinylene‐thienylene (TVT) or furanylene‐vinylene‐furanylene (FVF) as donor units and naphthalene diimide (NDI) as the acceptor units were synthesized for the application as polymer acceptors in all‐polymer solar cells (all‐PSCs). The all‐PSCs with a medium bandgap polymer J51 as donor and the two copolymers as acceptor show higher power conversion efficiency of 6.43% forP(TVT‐NDI) and 5.21% forP(FVF‐NDI).