TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): The preparation of organic semiconductor compound comprises reacting perylene halide derivative of formula (XXIII) and (hetero)aromatic compounds of formula (P1-A-P1).X = halo;P1 = 4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl, B(OR21)2, B(OH)2 or Sn(R22)(R23)(R24); andR21-R24 = 1-30C alkyl.Preferred Components: (I) is 2,5-bis-(2-n-decyl-2-n-octyl-ethyl)-3-(5-perylen-3-yl-thiophen-2-yl)-6-thiophen-2-yl-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione derivative of formula (XV), 2,5-bis-(2-n-decyl-2-n-octyl-ethyl)-3-(5-perylen-3-yl-selenophen-2-yl)-6-selenophen-2-yl-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione derivative of formula (XVI), 2,5-bis-(2-n-decyl-2-n-octyl-ethyl)-3-furan-2-yl-6-(5-perylen-3-yl-furan-2-yl)-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione derivative of formula (XVII), 2,5-bis-(2-n-decyl-2-n-octyl-ethyl)-3-(5-perylen-3-yl-thieno(3,2-b)thiophen-2-yl)-6-thieno(3,2-b)thiophen-2-yl-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione derivative of formula (XVIII), (E)-4,4'-bis-(2-n-decyl-2-n-octyl-ethyl)-2-perylen-3-yl-4H,4'H-(6,6')bi(thieno(3,2-b)pyrrolylidene)-5,5'-dione derivative of formula (XIX), (E)-4,4'-bis-(2-n-decyl-2-n-octyl-ethyl)-2-perylen-3-yl-4H,4'H-(6,6')bi(selenolo(3,2-b)pyrrolylidene)-5,5'-dione derivative of formula (XX), (E)-4,4'-Bis-(2-n-decyl-2-n-octyl-ethyl)-2-perylen-3-yl-4H,4'H-(6,6')bi(furo(3,2-b)pyrrolylidene)-5,5'-dione derivative of formula (XXI) or (E)-4,4'-bis-(2-n-decyl-2-n-octyl-ethyl)-2-perylen-3-yl-4H,4'H-(6,6')bi(3,7-dithia-4-aza-cyclopenta(a)pentalenylidene)-5,5'-dione derivative of formula (XXII).L = n-octyl; andM = n-decyl.Preferred Method: (XXIII) is prepared by reacting substituted perylene compound of formula (XXIV) with halides. The preparation of organic semiconductor compound is performed at 90-120 degrees C for 4-20 hours. EXAMPLE - 300 mg Deoxygenated and dry 3,9-Dibromoperylene and 300 mg 2,5-bis(2-octyldodecyl)-3,6-bis(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophen-2-yl)pyrrolo(3,4-c)pyrrole-1,4(2H,5H)-dione) were dissolved in 10 ml toluene, then solutions of 10 mg tris(dibenzylideneacetone)dipalladium(0) and 10 mg tri-o-tolyl phosphine in 1 ml anhydrous toluene were added to the obtained solution, then 1 ml 2M aqueous potassium carbonate solution and 2 drops of Aliquat 336 (RTM: Methyltrioctylammonium chloride) were added, and reacted under stirring condition for 48 hours at 150 degrees C. The resultant solid was dissolved in chloroform, passed through Florisil (RTM: Synthetic magnesium silicate) to remove catalyst and recrystallized from methanol to obtain 2,5-bis-(2-n-decyl-2-n-octyl-ethyl)-3-(5-perylen-3-yl-thiophen-2-yl)-6-thiophen-2-yl-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione derivative (XV) with weight average molecular weight of 19000.