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ACS Appl Mater Interfaces. 2014 Jul 9;6(13):10736-43. doi: 10.1021/am502595a. Epub 2014 Jun 26.

Directly drawn poly(3-hexylthiophene) field-effect transistors by electrohydrodynamic jet printing: improving performance with surface modification.

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1
POSTECH Organic Electronics Laboratory, Polymer Research Institute, Department of Chemical Engineering, Pohang University of Science and Technology , Pohang 790-784, Korea.

Abstract

In this study, direct micropatterning lines of poly(3-hexylthiophene) (P3HT) without any polymer binder were prepared by electrohydrodynamic jet printing to form organic field-effect transistors (OFETs). We controlled the dielectric surface by introducing self-assembled monolayers and polymer thin films to investigate the effect of surface modifications on the characteristics of printed P3HT lines and electrical performances of the OFETs. The morphology of the printed P3HT lines depended on the surface energy and type of substrate. The resulting OFETs exhibited high performance on octadecyltrichlorosilane-modified substrates, which was comparable to that of other printed P3HT OFETs. In order to realize the commercialization of the OFETs, we also fabricated a large-area transistor array, including 100 OFETs and low-operating-voltage flexible OFETs.

PMID:
24942503
DOI:
10.1021/am502595a
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