| abstract |
The present invention relates to a novel polymer comprising one or more units derived from a fused bis(thienothiophene) moiety; a process for the preparation thereof, and a monomer used therein, comprising a blend of such polymers, Mixtures and formulations, the use of such polymers, blends, mixtures and formulations as organic electronic (OE) devices, particularly semiconductors in organic photovoltaic (OPV) devices, and the inclusion of such polymers, blends OE and OPV devices for mixtures, formulations or formulations. |