title: High mobility field effect transistors based on macroscopically oriented regioregular copolymers.
abstract: Field-effect transistors fabricated from semiconducting conjugated polymers are candidates for flexible and low-cost electronic applications. Here, we demonstrate that the mobility of high molecular weight (300 kDa) regioregular, poly[4-(4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b']dithiophen-2-yl)-alt-[1,2,5]thiadiazolo[3,4-c]pyridine] can be significantly improved by introducing long-range orientation of the polymer chains. By annealing for short periods, hole mobilities of 6.7 cm(2)/(V s) have been demonstrated. The transport is anisotropic, with a higher mobility (approximately 6:1) parallel to the polymer backbone than that perpendicular to the polymer backbone.
authors.affiliation: Center for Polymers and Organic Solids, University of California -Santa Barbara, Santa Barbara, California 93106, United States.
authors.forename: Hsin-Rong
authors.initials: HR
authors.lastname: Tseng
authors.forename: Lei
authors.initials: L
authors.lastname: Ying
authors.forename: Ben B Y
authors.initials: BB
authors.lastname: Hsu
authors.forename: Louis A
authors.initials: LA
authors.lastname: Perez
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Takacs
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Heeger