Dithienosilole- and dibenzosilole-thiophene copolymers as semiconductors for organic thin-film transistors

Usta H. , Lu G., Facchetti A., Marks T. J.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol.128, no.28, pp.9034-9035, 2006 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 128 Issue: 28
  • Publication Date: 2006
  • Doi Number: 10.1021/ja062908g
  • Title of Journal : JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
  • Page Numbers: pp.9034-9035

Abstract

The synthesis and physicochemical properties of a new class of thiophene/arenesilole-containing π-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.