title: Flexible Organic Transistors with Controlled Nanomorphology.
abstract: We report the controlled nanomorphology of semiconducting polymers on chemically and mechanically stable nanogrooved polymer substrates. By employing silicon dioxide thin films with finely adjusted thicknesses on nanogrooved polymer substrates, semiconducting polymer thin films oriented and aligned along the nanogrooves were obtained. Organic field-effect transistors (OFETs) fabricated from the oriented semiconducting polymer, poly[4-(4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b']dithiophen-2-yl)-alt-[1,2,5]thiadiazolo-[3,4-c]pyridine] (PCDTPT), yielded saturation hole mobilities as high as 19.3 cm(2) V(-1 )s(-1), and the flexible "plastic" transistors demonstrated excellent mechanical stability under various bending conditions. These results represent important progress for solution-processed flexible OFETs and demonstrate that directed self-assembly of semiconducting polymers can be achieved by soft nanostructures.
authors.affiliation: Center for Polymers and Organic Solids, ‡Materials Department, §Mitsubishi Chemical Center for Advanced Materials, University of California Santa Barbara , Santa Barbara, California 93106, United States.
authors.forename: Byoung Hoon
authors.initials: BH
authors.lastname: Lee
authors.affiliation: Center for Polymers and Organic Solids, ‡Materials Department, §Mitsubishi Chemical Center for Advanced Materials, University of California Santa Barbara , Santa Barbara, California 93106, United States.
authors.forename: Ben B Y
authors.initials: BB
authors.lastname: Hsu
authors.affiliation: Center for Polymers and Organic Solids, ‡Materials Department, §Mitsubishi Chemical Center for Advanced Materials, University of California Santa Barbara , Santa Barbara, California 93106, United States.
authors.forename: Shrayesh N
authors.initials: SN
authors.lastname: Patel
authors.affiliation: Center for Polymers and Organic Solids, ‡Materials Department, §Mitsubishi Chemical Center for Advanced Materials, University of California Santa Barbara , Santa Barbara, California 93106, United States.
authors.forename: John
authors.initials: J
authors.lastname: Labram
authors.affiliation: Center for Polymers and Organic Solids, ‡Materials Department, §Mitsubishi Chemical Center for Advanced Materials, University of California Santa Barbara , Santa Barbara, California 93106, United States.
authors.forename: Chan
authors.initials: C
authors.lastname: Luo
authors.affiliation: Center for Polymers and Organic Solids, ‡Materials Department, §Mitsubishi Chemical Center for Advanced Materials, University of California Santa Barbara , Santa Barbara, California 93106, United States.
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan
authors.affiliation: Center for Polymers and Organic Solids, ‡Materials Department, §Mitsubishi Chemical Center for Advanced Materials, University of California Santa Barbara , Santa Barbara, California 93106, United States.
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Heeger
keywords: Flexible organic field-effect transistor; atomic layer deposition; directed self-assembly; nanoimprint; nanomorphology control; semiconducting polymer