TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The monomer (II) is functionalized with groups comprising metal, optionally tin, for polymerization. It is functionalized for Ullman, Yamamoto, or Suzuki polymerization. The terminal thiophene rings are functionalized for polymerization. The solvent comprises a mixture of orthodichlorobenzene and trichlorobenzene.    TECHNOLOGY FOCUS - POLYMERS - Preparation (disclosed): Preparation of (I) comprises charging (2,2'-(thieno(3,2-b)thiophene-2,5-diyl)bis(thiophene-3,2-diyl))bis(bis(4-(2-ethylhexyl)phenyl)methanol) in a flask under argon atmosphere; adding toluene and Amberlyst 15 (RTM: polymer based strong acid ion exchange resin); purging the flask with vacuum-argon cycles, and placing in a preheated bath at 110 degrees C; monitoring the reaction by thin layer chromatography using hexane as eluent; and cooling to room temperature, and filtering. Preferred Component: (I) has a molecular weight of greater than or equal to 10000 number average molecular weight. It has greater than or equal to 2 types of donors, or greater than or equal to 2 types of acceptors. The (I) is soluble in chloroform, chlorobenzene, dichlorobenzene, or trichlorobenzene. The ink composition further comprises an additive(s). SPECIFIC COMPOUNDS - 5 monomers of formula (II) are disclosed, e.g. 5,5,10,10-tetrakis(4-(2-ethylhexyl)phenyl)-3,5,8,10-tetrahydro-cyclopenta(1,2-b:5,4-b')dithiophene(2',1':4,5)thieno(2,3-d)thiophene of formula (Ia); (5,5,10,10-tetrakis(4-(2-ethylhexyl)phenyl)-3,5,8,10-tetrahydro-cyclopenta(1,2-b:5,4-b')dithiophene(2',1':4,5)thieno(2,3-d)thiophene-2,7-diyl)bis(trimethylstannane); 5,5,10,10-tetrakis(4-(2-ethythexyl)phenyl)-3, 5,8, 10-tetrahydro-cyclopenta (1,2-b:5,4-b')dithiophene(2',1':4,5)thieno(2,3-d)thiophene; 5,5,10,10-tetrakis(4-(2-ethylhexyl)phenyl)-3, 5,8, 10-tetrahydro-cyclopenta ( 1,2-b:5,4-b')dithiophene(2',1':4,5)thieno(2,3-d)thiophene and 5,5'-bis(2-ethylhexyl)-4H,4'H-(1, 1'-bithieno(3,4-c)pyrrole)-4,4',6,6'(5H,5'H)-tetraone; or poly(3-(5,6-bis(2-ethylhexyl)naphtho(2, 1-b:3,4-b')dithiophen-2-yl)-alt-5,5'-bis(2-ethylhexyl)-4H,4'H-(1,1'-bithieno(3,4-c)pyrrole)-4,4',6,6'(5H,5'H)-tetraone).    EXAMPLE - (2,2'-(Thieno(3,2-b)thiophene-2,5-diyl)bis(thiophene-3,2-diyl))bis(bis(4-(2-ethylhexyl)phenyl)methanol) (2.1 g) was charged in a schlenk flask under argon atmosphere. Toluene (200 mL, bubbled overnight with argon) was added along with Amberlyst 15 (RTM: polymer based strong acid ion exchange resin) (1 g). The flask was purged with vacuum-argon cycles 5 times, and placed in a preheated bath at 110 degrees C. The reaction was monitored by thin layer chromatography using hexane as eluent. When the reaction was completed, it was cooled to room temperature, and immediately filtered through silica plug to yield a yellow-orange solid (1.1 g, 57%).