Anisotropic assembly of conjugated polymer nanocrystallites for enhanced charge transport

Mincheol Chang; Jiho Lee; Ping-Hsun Chu; Dalsu Choi; Byoungnam Park; Elsa Reichmanis

doi:10.1021/am506546k

Anisotropic assembly of conjugated polymer nanocrystallites for enhanced charge transport

ACS Appl Mater Interfaces. 2014 Dec 10;6(23):21541-9. doi: 10.1021/am506546k. Epub 2014 Nov 7.

Authors

Mincheol Chang¹, Jiho Lee, Ping-Hsun Chu, Dalsu Choi, Byoungnam Park, Elsa Reichmanis

Affiliation

¹ 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.

PMID: 25347053
DOI: 10.1021/am506546k

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).

Keywords: anisotropic assembly; molecular ordering; nanofibers; organic field effect transistors; poly(3-hexylthiophene).

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.