Abstract
AbstractA donor‐acceptor polymer of (3E,7E)‐3,7‐bis(2‐oxoindolin‐3‐ylidene)benzo[1,2‐b : 4,5‐b′]difuran‐2,6(3H,7H)‐dione (IBDF) and bithiophene (BT) exhibits typical ambipolar charge transport behaviour in organic thin film transistors. Using the electron rich triphenylamine as an end capping group, a notable suppression of hole transport is observed. This interesting phenomenon is accounted for by the hole trapping effect of the triphenylamine end‐capper. Thus, this study provides a novel and facile approach to tuning the charge carrier polarity of a polymer semiconductor from ambipolar to n‐type dominant.
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