TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The HAr1 and Hal of the precursor compound comprise aryl compound of formulae (IIIa), (IIIb) and (IIIc), and thiazole compound of formula (IIId). (A) has one of: (2,2')bithiophenyl compound of formula (IVa), (2,2')biselenophenyl compound of formula (IVb) or 5,5'-dibromo-(2,2')bithiophenyl compound of formula (IVc); 1H,1'H-(2,2')bipyrrolyl compound of formula (IVd) or 3H,3'H-(4,4')biimidazolyl compound of formula (IVe); or (5,5')bithiazolyl compound of formula (IVf) or (2,2')bithiazolyl compound of formula (IVg). (I) has tricyclic compound of formula (Va). In formula (IIIa):R1 = halide or 1-30C organic radical (optionally substituted with alkyl, alkynyl, aryl or heteroaryl), -Sn(R2)3, -Si(R2)3, -Si(OR2)3 or -B(-OR21)2; eitherR21 = alkyl or aryl; orR21R21 = optionally substituted alkylene group bridging the oxygen atoms;R2 = alkyl or aryl;X1 = O, S, Se or NR3;R3 = 1-18C alkyl, perfluoroalkyl, aryl or heteroaryl;Y1 = CH, CR4 or N; andR4 = 1-18C alkyl, aryl or heteroaryl.In formula (IIIb):X1 = S, Se, or NR3.In formula (IIIc):X1 = S or NR3.In formula (IVa)-(IVg):R1 = H, halide or 1-30C organic radical comprising alkyl, alkynyl, aryl or heteroaryl or -Sn(R2)3, -Si(R2)3, -Si(OR2)3 or -B(-OR21)2; eitherR21 = alkyl or aryl; orR21R21 = optionally substituted alkylene group bridging the oxygen atoms;R2 = alkyl or aryl;R4 = 1-18C alkyl, aryl or heteroaryl; andR3 = 1-18C alkyl, perfluoroalkyl, aryl or heteroaryl.In formula (Va):X = O, S, Se or NR3;R3 = 1-18C alkyl, perfluoroalkyl, aryl or heteroaryl;Y1 = CH, CR4 or N;R4 = 1-18C alkyl, aryl or heteroaryl;Z1 = S, Se, NR5, C(O), C(O)C(O), Si(R5)2, SO, SO2, PR5, P(O)R5, BR5 or C(R5)2; andR5 = 1-50C organic radical comprising optionally substituted alkyl, perfluoroalkyl, aryl or heteroaryl. Preferred Definitions: In formula (I):    R1 = thiophene or thiazole moiety or at least one acyl moiety.    EXAMPLE - 2-Bromothiophene (16.3 g) was dissolved in anhydrous tetrahydrofuran (THF) (200 ml) and the colorless solution was cooled in acetone/dry ice bath. Lithium diisopropylamide (LDA) (1.2 M in hexanes-THF, 83.3 ml) was added dropwise and clear yellow-orange solution was stirred for 1 hour. Chlorotrimethylsilane (10.86 g) was added dropwise, the mixture was stirred for 1 hour and clean formation of 2-bromo-5-trimethylsilylthiophene was confirmed. LDA (1.2 M in hexanes-THF (91.7 ml)) was added dropwise, and after stirring for 0.5 hour thick suspension formed. Copper chloride (14.79 g) was added in one portion. Dark green mixture was allowed to slowly warm to room temperature overnight. Hexanes and water were added (copper salts partially precipitated out) and the organic phase was carefully removed. The aqueous phase was extracted with hexanes several times and combined organic phases were dried over magnesium sulfate. The solvents were removed by rotary evaporation and the residue (oil with some green copper salts) was dissolved in hexanes. Then, the solution was filtered through silica gel plug (hexanes as eluent), the solvent was removed from brownish solution and the crude product was obtained as oil, which was partially solidified overnight. The crude material was purified by distillation to give 3,3'-dibromo-5,5'-bis-trimethylsilanyl-2,2'-bithiophene (84.5%).