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Proceedings Paper

Structure vs. property relationships in high mobility fused thiophene polymers
Author(s): Mingqian He; Jianfeng Li; Michael L. Sorensen; Feixia Zhang; Hon Hang Fong; Vladimir A. Pozdin; Detlef M. Smilgies; George G. Malliaras
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Paper Abstract

A family of conjugated polymers with fused structures consisting of three to five thiophene rings and with the same alkyl side chains has been synthesized as a means to understand structure - property relationships. All three polymers showed well extended conjugation through the polymer backbone. X-ray diffraction study of the polymer thin films suggests that the polymer with the even number of fused thiophene rings forms a tight crystalline structure due to its tilted side chain arrangement. On the other hand, the polymers with the odd number of fused thiophene rings packed more loosely. Characterization in a field-effect transistor configuration showed that the mobility of the polymer with the even number of rings is one order of magnitude higher than its oddnumbered counterparts. Through this structure - property study, we demonstrate that proper design of the molecules and properly arranged side chain positions on the polymer backbone can greatly enhance polymer electronic properties

Paper Details

Date Published: 20 August 2009
PDF: 11 pages
Proc. SPIE 7417, Organic Field-Effect Transistors VIII, 74170F (20 August 2009);
Show Author Affiliations
Mingqian He, Corning Inc. (United States)
Jianfeng Li, Corning Inc. (United States)
Michael L. Sorensen, Corning Inc. (United States)
Feixia Zhang, Corning Inc. (United States)
Hon Hang Fong, Cornell Univ. (United States)
Vladimir A. Pozdin, Cornell Univ. (United States)
Detlef M. Smilgies, Cornell Univ. (United States)
George G. Malliaras, Cornell Univ. (United States)

Published in SPIE Proceedings Vol. 7417:
Organic Field-Effect Transistors VIII
Zhenan Bao; Iain McCulloch, Editor(s)

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