Patent ID: 8691930

Claim:
A polymer represented by Formula 1 below: wherein, n is a real number in the range of about 0.01 to about 0.99, X is O or S, R 1 is H, a linear C 1 -C 20 alkyl group, a branched C 1 -C 20 alkyl group, a cyclic C 3 -C 20 alkyl group, or a C 6 -C 14 aromatic group, wherein the aromatic group may be substituted with a C 1 -C 20 alkyl group or a C 1 -C 20 alkoxy group, R 2 and R 3 are each independently a hetero aromatic group substituted with a heteroatom or a C 6 -C 26 aromatic group, wherein the aromatic group or the heteroaromatic group may be substituted with a C 1 -C 20 alkyl group or a C 1 -C 20 alkoxy group, and Ar is a hetero aromatic group substituted with a heteroatom linear C 1 -C 20 alkyl group, a branched C 1 -C 20 alkylene group, or a C 6 -C 26 aromatic group, wherein the aromatic group or the heteroaromatic group is substituted with a C 1 -C 20 alkyl group or a C 1 -C 20 alkoxy group.