title: Directly drawn poly(3-hexylthiophene) field-effect transistors by electrohydrodynamic jet printing: improving performance with surface modification.
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.
authors.affiliation: POSTECH Organic Electronics Laboratory, Polymer Research Institute, Department of Chemical Engineering, Pohang University of Science and Technology , Pohang 790-784, Korea.
authors.forename: Yong Jin
authors.initials: YJ
authors.lastname: Jeong
authors.forename: Hyungdong
authors.initials: H
authors.lastname: Lee
authors.forename: Byoung-Sun
authors.initials: BS
authors.lastname: Lee
authors.forename: Seonuk
authors.initials: S
authors.lastname: Park
authors.forename: Hadi Teguh
authors.initials: HT
authors.lastname: Yudistira
authors.forename: Chwee-Lin
authors.initials: CL
authors.lastname: Choong
authors.forename: Jong-Jin
authors.initials: JJ
authors.lastname: Park
authors.forename: Chan Eon
authors.initials: CE
authors.lastname: Park
authors.forename: Doyoung
authors.initials: D
authors.lastname: Byun