| 초록 |
Naphthalene diimide (NDI)-based conjugated polymers produce a strong π- π stacking interaction through NDI-driven self-assembly. Through the formation of interconnected networks in large crystalline domains, NDI-based conjugated polymers are widely used in n-type organic devices. However, due to the limitation of macromolecular morphologies of polymer chain (e.g., chain-folding, loose loops, dangling segments, and tie molecules), little mechanical and electrical properties are guaranteed. In this study, we controlled the intermolecular interactions by introducing a fluorinated copolymer of NDI and (E)-1,2-bis(3-fluorothiophen-2-yl)ethene (FTVT) (PNDI-FTVT). PNDI-FTVT shows short-range ordered segments compared with PNDI-TVT owing to its strong intermolecular interactions. Also 81% of its initial performance is maintained at a bending radius of 8.0mm after 1000 bending cycles. |
