| abstract |
The invention relates to novel polymers containing one or more thieno[3, 2-b]thiophene-2, 5-dione and/or furo[3, 2-b]furan-2, 5-dionerepeating units or their thioketone derivatives, monomers and methods for their preparation, their use as semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices, and to OE and OPV devices comprising these polymers. |