title: Side-Chain-Induced Rigid Backbone Organization of Polymer Semiconductors through Semifluoroalkyl Side Chains.
abstract: While high-mobility p-type conjugated polymers have been widely reported, high-mobility n-type conjugated polymers are still rare. In the present work, we designed semifluorinated alkyl side chains and introduced them into naphthalene diimide-based polymers (PNDIF-T2 and PNDIF-TVT). We found that the strong self-organization of these side chains induced a high degree of order in the attached polymer backbones by forming a superstructure composed of "backbone crystals" and "side-chain crystals". This phenomenon was shown to greatly enhance the ordering along the backbone direction, and the resulting polymers thus exhibited unipolar n-channel transport in field-effect transistors with remarkably high electron mobility values of up to 6.50 cm(2) V(-1) s(-1) and with a high on-off current ratio of 10(5).
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology , Pohang 790-784, Korea.
authors.forename: Boseok
authors.initials: B
authors.lastname: Kang
authors.affiliation: Department of Chemistry and RIGET, Gyeongsang National University , 501 Jinju Daero, Jinju, 660-701, Korea.
authors.forename: Ran
authors.initials: R
authors.lastname: Kim
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology , Pohang 790-784, Korea.
authors.forename: Seon Baek
authors.initials: SB
authors.lastname: Lee
authors.affiliation: School of Materials Science & Engineering and ERI, Gyeongsang National University , 501 Jinju Daero, Jinju, 660-701, Korea.
authors.forename: Soon-Ki
authors.initials: SK
authors.lastname: Kwon
authors.affiliation: Department of Chemistry and RIGET, Gyeongsang National University , 501 Jinju Daero, Jinju, 660-701, Korea.
authors.forename: Yun-Hi
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology , Pohang 790-784, Korea.
authors.forename: Kilwon
authors.initials: K
authors.lastname: Cho