TECHNOLOGY FOCUS - POLYMERS - Preparation (Disclosed): Preparation of (I) comprises: reacting substituted dibenzothienylpyrrole compound of formula (II) with 2 moles of succinimide compound of formula (NXS) (IIa) to give substituted dibenzothienylpyrrole compound of formula (III); reacting (III) with 2 moles of a compound of formula (A1-R1) to give substituted dibenzothienylpyrrole compound of formula (IV); reacting (IV) with 2 moles of (IIa) to give substituted dibenzothienylpyrrole compound of formula (V); and reacting (V) with a compound of formula (R1-B1-R1) to obtain (I).NXS = N-bromosuccinimide or N-iodosuccinimide;X = I or Br;R1 = -Sn(R2)3; andR2 = linear or branched 1-6C alkyl, preferably tributylstannyl or trimethylstannyl.Preferred Components: The polymer has a weight average molecular weight of 2000-150000 (preferably 10000-70000) Dalton. EXAMPLE - N-(4-Dodecylphenyl)-di(2'-(3'-hexyl)-5'-bromothienyl)dibenzothienylpyrrole (304.3 mg), 4,7-bis-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)-2,1,3-benzothiadiazole (116.5 mg), anhydrous n-propanol (1 ml), aqueous solution of 4 M potassium bicarbonate (1 ml), distilled toluene (3 ml), and Aliquat 336 (RTM: N-Methyl-N,N-dioctyloctan-1-ammonium chloride) (5 drops) were introduced into a two-necked flask (25 ml), equipped with a magnetic stirrer and reflux cooling, under a nitrogen atmosphere. The reaction mixture was heated to 70 degrees C for 15 minutes, and tetrakis(triphenylphosphine)palladium (4 mg) was added. The reaction mixture was subsequently left at reflux temperature for 40 hours to obtain a solution. The solution was cooled to room temperature and the solvent was removed by distillation to obtain a solid product (s1). The solid product (S1) was redissolved in chlorobenzene (10 ml) and then precipitated in methanol (200 ml). The precipitate obtained was filtered, washed with methanol and water, and left to dry to obtain a solid product (S2). The solid product (S2) was redissolved again in chlorobenzene (10 ml) and then precipitated in methanol (200 ml). The precipitate obtained was filtered, washed with methanol and water, left to dry to obtain benzothiadiazolehexylthiphene-dibenzothienyl-pyrrole-dodecylbenzene-hexylthiophene (280 mg) as a purple-colored powder.