Patent ID: 7767999

Claim:
An electronic device containing a polythiophene wherein R represents a side chain and m represents the number of R substituents; A is a divalent linkage; x represents the number of R m substituted thienylene moieties, y represents the number of unsubstituted thienylene moieties; z represents the number of divalent linkages A in the monomer segment, z being 0 or 1; n represents the number of repeating monomer segments in the polymer or the degree of polymerization; the device comprises a substrate, a gate electrode, a gate dielectric layer, a source electrode and a drain electrode, and in contact with the source/drain electrodes and the gate dielectric layer a semiconductor layer comprised of said polythiophene; and wherein n is from about 5 to about 4,000; the number average molecular weight (M n ) of the polythiophene is from about 2,000 to about 100,000; the weight average molecular weight (M w ) is from about 4,000 to over 500,000, both M w and M n being measured by gel permeation chromatography using polystyrene standards.