Oligothiophene‐Based Networks Applied for Field‐Effect Transistors

A new type of semiconducting material based on polymerizable oligothiophenes (see Figure) has been prepared. In field‐effect transistors, a charge‐carrier mobility of 10^–3 cm² V^–1 s^–1 is observed prior to polymerization. Photopolymerization to a polymer network provides mechanical stability and allows direct photopatterning of the semiconductor. These materials also appear more stable to oxidative doping than polythiophenes.