TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compositions: Organic solvent is tetrahydrofuran, N,N-dimethyl formamide, or toluene, and 1st catalyst is tris(dibenzylideneacetone) palladium and tri(o-tolyl) phosphine mixture, bis(triphenylphosphine) palladium dichloride, or tetra(triphenyl phosphine) palladium in which 1st catalyst is 0.01-5 mol.% times of compound A. Molar ratio tris(dibenzylideneacetone) palladium:tri(o-tolyl) phosphine is 1:2-1:20. Solvent for dissolving compounds (C) and (D) is tetrahydrofuran, N,N-dimethyl formamide, or toluene, chloride is lithium chloride or cuprous chloride, 2nd catalyst is (triphenylphosphine) palladium dichloride or tetra(triphenylphosphine) palladium, solvent added to compound (E) is xylene or toluene, 3rd catalyst is (triphenyl phosphine) palladium dichloride, tris (dibenzylideneacetone) palladium, or tetra (triphenyl phosphine) palladium, and solvent for compound (F) is tetrahydrofuran and N,N-dimethyl formamide mixture. Molar ratio chloride:compound C is 1.5:1-1.62:1, 2nd catalyst is 0.01-5 mol.% of compound C, sodium tert.-butoxide is 5-8 times molar amount of compound E, 2,2'-bis (diphenylphosphino)-1,1'-binaphthyl is 0.2-0.3 times molar amount compound E, and 3rd catalyst is 5-10 mol.% of compound E.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: Conjugated polymer material contains compounds formulae (Ia)-(Id). Preferred Processes: Separate-purifying is performed by decompression evaporating reaction mixed liquid to remove excess toluene, methanol-sedimenting, filtering, methanol-washing, drying, passing to alumina column chromatography, washing with chloroform to obtain liquid chromatography, depositing by methanol, filtering, extracting obtained solid with acetone for 3 days in Soxhlet extractor, methanol sedimenting, filtering, vacuum pumping, and filtering. Thiophene compound (A) is prepared by mixing diiodo-dibromobenzene (C) and thiophene compound of formula (D) under inert gas in which molar ratio compound C:compound D is 1:1.1-1:1.5, adding solvent, chloride, and 2nd catalyst, stirring at room temperature for 1-2 hours, heating to 50-55 degrees C, reacting for 3-4 hours, cooling to room temperature, filtering to obtain bromo-thiophene compound of formula (E), mixing compound (E) and alkylamine under inert gas atmosphere in which molar ratio compound (E):alkylamine is 1:3-1:4, adding solvent, sodium tert.-butoxide, 2,2'-bis (diphenylphosphino)-1,1'-binaphthyl, and 3rd catalyst sequentially, stirring to carry out Buchwald-Hartwig coupling reaction for 2-3 hours, cooling to room temperature, filtering to remove solid, extracting filter liquid, washing with saturated saltwater, drying, filtering, rotary steaming to remove solvent, separate-purifying with silicon glue column chromatography to obtain thiophene compound of formula (F), dissolving compound (F) and N-bromosuccinimide in solvent, cooling to 78 degrees C, dropwise adding N-bromosuccinimide in which molar ratio compound (F):N-bromosuccinimide is 1:2.2-1:3, stirring and reacting for 0.5-1 hour, water quenching, extracting reaction liquid, drying, and separate-purifying with silicon glue column chromatography.