title: Dithienosilole- and dibenzosilole-thiophene copolymers as semiconductors for organic thin-film transistors.
abstract: The synthesis and physicochemical properties of a new class of thiophene/arenesilole-containing pi-conjugated polymers are reported. Examples of this new polymer class include the following: poly(2,5-bis(3',3' '-dihexylsilylene-2',2' '-bithieno)thiophene) (TS6T1), poly(2,5'-bis(3' ',3' ''-dihexylsilylene-2' ',2' ''-bithieno)bithiophene) (TS6T2), poly(2,5'-bis(2' ',2' ''-dioctylsilylene-1' ',1' ''-biphenyl)thiophene) (BS8T1), and poly(2,5'-bis(2' ',2' ''-dioctylsilylene-1' ',1' ''-biphenyl)bithiophene) (BS8T2). Organic field-effect transistors (OFETs) with hole carrier mobilities as high as 0.02-0.06 cm2/V s in air, low turn-on voltages, and current on/off ratios >105-106 are fabricated using solution processing techniques with the above polymers as the active channel layer. OFETs based on this polymer class exhibit excellent ambient operational stability.
authors.affiliation: Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
authors.forename: Hakan
authors.initials: H
authors.lastname: Usta
authors.forename: Gang
authors.initials: G
authors.lastname: Lu
authors.forename: Antonio
authors.initials: A
authors.lastname: Facchetti
authors.forename: Tobin J
authors.initials: TJ
authors.lastname: Marks