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Keywords:

  • organic field-effect transistors;
  • n-type organic semiconductors;
  • fluorinated phenylene;
  • diketopyrrolopyrrole
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Copolymers composed of diketopyrrolopyrrole and phenylene units with different numbers of fluorine subsitution are synthesized. When the effect of the number of fluorine substitution on the n-channel transporting property is investigated, the polymer with four fluorine substitutions exhibits the best n-type charge-transporting behavior with an electron mobility of 2.36 cm2 V−1 s1.