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Keywords:

  • charge-carrier mobility;
  • oligoacenes;
  • organic field-effect transistor;
  • semiconductors;
  • solution processing
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The facile synthesis of a new five-ring-fused pentacene analog with four symmetrically fused thiophene ring units (Dithieno[2,3-d;2′,3′-d′]benzo[1,2-b;4,5-b′]dithiophene, Cn-DTBDT) is presented. After aligning this material from solution, thin films for organic field-effect transistors were obtained, resulting in excellent hole mobilities of up to 1.7 cm2V−1s−1, and on/off ratio of 107.