Patent ID: 7777221

Claim:
An organic semiconducting copolymer represented by Formula 1 below: wherein A 1 to A 4 and B 1 to B 4 are each independently selected from hydrogen, a hydroxyl group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxyalkyl group, or a C 1 -C 16 alkoxy group; D 1 and D 2 are each independently selected from the structures below: x, x′, and y are each an integer in the range of about 1 to 6; z is an integer in the range of about 0 to 4; and m and n are each an integer greater than 0, the sum of m+n representing a degree of polymerization and being an integer in the range of about 5 to 200.