New copolythiophene containing thiophene integrated in the polymer chain, useful in the form of a field effect transistor, a diode, a photovoltaic cell, an integrated circuit, a capacitor or a sensor

Copolythiophene containing thiophene (I) integrated in the polymer chain, is new. Copolythiophene containing thiophene of formula (I) integrated in the polymer chain, is new. R 1>an oxygen moiety of formula [(-CH 2) n-O] m-R 2>; R 2>1-18C alkyl; n : 1-6; and m : 1-20, preferably 1-9. An independent claim is also included for the electrical component comprising a semiconductor made from a copolythiophene.