TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The electron acceptor compound is a condensed aromatic electron acceptor or a condensed heteroaromatic electron acceptor. The aromatic or heteroaromatic compound comprises optionally substituted thiophene, bithiophene, thienothiophene, phenylene, biphenylene, phenanthrenylene, dihydrophenanthrenylene, fluorene, carbazole and/or oligoarylene.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymeric semiconductor is a polymer of formula (II).X = (hetero)aromatic electron acceptor, preferably isoindole-1,3-dione-4,7-diyl moiety of formula (IIa), heterocyclic moiety of formula (IIb), quinoxaline-5,8-diyl moiety of formula (IIc), thieno(3,4-b)pyrazine-5,7-diyl moiety of formula (IId), 2-thia-1,3,5,8-tetraaza-cyclopenta(b)naphthalene-4,9-diyl moiety of formula (IIe), 11-thia-9,13-diaza-cyclopenta(b)triphenylene-10,12-diyl, 9-thia-7,11-diaza-cyclopenta(k)fluoranthene-8,10-diyl or thieno(3,4-b)thiophene-2-carboxylic acid-4,6-diyl moiety of formula (IIf);n = 2-5000, preferably 5-800;Y1 = C or N;Z = O, S or Se; andR3 = H, hydrocarbon group and/or hetero atom.Preferred Method: The method comprises substituting the compound exhibiting the bivalent linkage with at least one boron reagent or at least one halogen atom. The 4,8-disubstituted benzodithiophene (I) is copolymerized with the compound exhibiting the bivalent linkage, at the second and sixth position, by Suzuki-Miyaura polycondensation. EXAMPLE - 2,6-Dibromo-4,8-didodecylbenzo(1,2-b:4,5-b')dithiophene (685 mg) and 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo(c)(1,2,5)thiadiazole (388 mg) were dissolved in a mixture of toluene (20 ml), 2 M aqueous potassium carbonate solution (10 ml) and Aliquat 336 (RTM: N-methyl-N,N-dioctyloctan-1-ammonium chloride) (0.1-0.5 ml). The mixture was then deoxygenated with argon for 1 hour. Then tetrakis(triphenylphosphine)palladium(0) (1-5 mole%) was added to the reaction mixture and heated to 80-90 degrees C. After 72 hours, phenylboronic acid and bromobenzene were added to the copolymer. Then the crude copolymer was worked up to obtain the polymeric semiconductor compound.