title: Anisotropic assembly of conjugated polymer nanocrystallites for enhanced charge transport.
abstract: The anisotropic assembly of P3HT nanocrystallites into longer nanofibrillar structures was demonstrated via sequential UV irradiation after ultrasonication to the pristine polymer solutions. The morphology of resultant films was studied by atomic force microscopy (AFM), and quantitative analysis of intra- and intermolecular ordering of polymer chains was performed by means of static absorption spectroscopy and quantitative modeling. Consequently, the approach to treat the precursor solution enhanced intra- and intermolecular ordering and reduced the incidence of grain boundaries within P3HT films, which contributed to the excellent charge carrier transport characteristics of the corresponding films (μ ≈ 12.0 × 10(-2) cm(2) V(-1) s(-1) for 96% RR P3HT).
authors.affiliation: School of Chemical and Biomolecular Engineering, ‡School of Chemistry and Biochemistry, and §School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332-0100, United States.
authors.forename: Mincheol
authors.initials: M
authors.lastname: Chang
authors.forename: Jiho
authors.initials: J
authors.lastname: Lee
authors.forename: Ping-Hsun
authors.initials: PH
authors.lastname: Chu
authors.forename: Dalsu
authors.initials: D
authors.lastname: Choi
authors.forename: Byoungnam
authors.initials: B
authors.lastname: Park
authors.forename: Elsa
authors.initials: E
authors.lastname: Reichmanis
keywords: anisotropic assembly; molecular ordering; nanofibers; organic field effect transistors; poly(3-hexylthiophene)