TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): Preparation of (I) comprises coupling substituted phenanthro(1,10,9,8-c,d,e,f,g)carbazole monomers (II) with each other, and/or with at least one substituted aryl monomer of formula (R4-Ar1-R5) in an aryl-aryl coupling reaction. Preferred Components: (I) is of formula (IA) or (IB).n = 1. Preferred Definitions:    Ar1 = benzo(1,2,3)thiadiazole-4,7-diyl, benzo(1,2,3)selenadiazole-4,7-diyl, benzo(1,2,5)thiadiazole-4,7-diyl, benzo(1,2,5)selenadiazole-4,7-diyl, 4,7-di-thien-2-yl-benzo(1,2,3)thiadiazole, 4,7-di-thien-2-yl-benzo(1,2,5)thiadiazole, 2,3-dicyano-1,4-phenylene, 2,5-dicyano,1,4- phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,3,5,6-tetrafluoro-1,4-phenylene, 3,4-difluorothiophene-2,5-diyl, thieno(3,4-b)pyrazine-2,5-diyl, quinoxaline-5,8-diyl, selenophene-2,5-diyl, thiophene-2,5-diyl, thieno(3,2-b)thiophene-2,5-diyl, thieno(2,3-b)thiophene-2,5-diyl, selenopheno(3,2-b)selenophene-2,5-diyl, selenopheno(2,3-b)selenophene-2,5-diyl, selenopheno(3,2- b)thiophene-2,5-diyl, selenopheno(2,3-b)thiophene-2,5-diyl, 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, para-para-biphenyl, naphthalene-2,6-diyl, benzo(1,2-b:4,5-b')dithiophene-2,6-diyl, 2,2-dithiophene, 2,2-diselenophene, thiazole, oxazole (all optionally substituted with R1);    m = 0 or 1;    R = (ALK)2-(CH-), (ALK)2-(CH-)-CH2-, -ALK, (ALK)3-C- or ALK-substituted phenyl moieties of formulae (i)-(iv); and    ALK = 1-20C linear alkyl or alkoxy (optionally fluorinated).    EXAMPLE - A dried round bottom flask was charged with N-octylphenanthro(1,10,9,8-c,d,e,f,g)carbazole (2.4 g) and dichloromethane (320 cm3). To this solution, N-bromosuccinimide (2.26 g) was added slowly, stirred for 60 minutes at 25 degrees C and then poured into distilled water (200 cm3). The resulting solution was extracted with dichloromethane (2x 100 cm3) and worked up to give 2,7-dibromo-N-octylphenanthro(1,10,9,8-c,d,e,f,g)carbazole (A1). Tetrahydrofuran (37 cm3) was added to (A1) (2 g) and the resulting solution was cooled down to -78 degrees C. Then n-butyllithium (2.5M in hexanes, 3.06 cm3) was added dropwise over 10 minutes and the mixture was stirred at -78 degrees C for 1 hour. Then 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.68 cm3) was added rapidly to the solution. After an additional 1 hour at -78 degrees C, the resulting mixture was warmed to room temperature, stirred overnight and worked up to give 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-octylphenanthro(1,10,9,8-c,d,e,f,g)carbazole (A2). In a dried flask, (A2) (500 mg) 4,7-di(2'-bromothien-5'-yl)-2,1,3-benzothiadiazole (567.7 mg), tris(dibenzylideneacetone)dipalladium(0) (3.6 mg), tri(o-tolyl)phosphine (4.9 mg) and Aliquat 336 (RTM: Methyltrioctylammonium chloride) (50 mg) were dissolved in degassed toluene (8 cm3) and degassed 2 M aqueous potassium carbonate (3.2 cm3). The reaction mixture was vigorously stirred at 100-105 degrees C for 24 hours. The polymer was purified by precipitation into methanol:water (10:1), filtered and washed sequentially with acetone, petroleum ether and chloroform. The chloroform fraction was reduced to a smaller volume under reduced pressure and precipitated into methanol (500 cm3). The precipitated polymer was filtered and dried under vacuum at 25 degrees C overnight to give poly(2,7-N-octylphenanthro(1,10,9,8-c,d,e,f,g)carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole).