Patent ID: 8641926

Claim:
An electrically conductive or semiconductive layer deposited from a composition comprising an aqueous dispersion of at least one polythiophene, at least one colloid-forming polymeric acid wherein at least about 50% of the total number of hydrogen atoms in said colloid-forming polymeric acid are substituted with fluorine atoms, and at least one co-dispersing liquid, wherein said polythiophene has Formula I(a): wherein: R″ is the same or different at each occurrence and is selected from hydrogen, alkyl, heteroalkyl, alkenyl, heteroalkenyl, alcohol, amidosulfonate, benzyl, carboxylate, ether, ether carboxylate, ether sulfonate, sulfonate, and urethane, with the proviso that at least one R″ is not hydrogen, m is 2 or 3, and n is at least about 4; or Formula I(b) R′ 1 and R 1 are independently selected from hydrogen or alkyl, or R′ 1 and R 1 taken together form an alkylene chain having 1 to 4 carbon atoms, which may optionally be substituted by alkyl or aromatic groups having 1 to 12 carbon atoms, or a 1,2-cyclohexylene radical, and n is at least about 4; and further wherein the polythiophene is formed by polymerization in the presence of the colloid forming polymeric acid, and the co-dispersing liquid is added after termination of polymerization.