Patent ID: 8062766

Claim:
An organic electroluminescent device, comprising: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, the organic layer containing a polymer having a degree of polymerization in the range of 10 to 2,000, the polymer comprising: 1 through 99 mole % of a repeating unit represented by Formula (1); and 99 through 1 mole % of a repeating unit represented by Formula (2): where Ar is a C 6-26 aromatic group or a C 4-20 heteroaromatic group comprising at least one heteroatom in the aromatic ring, where the aromatic group or the heteroaromatic group is unsubstituted or substituted with at least one of a C 1-12 alkyl group, a C 1-12 alkoxy group, and —N(R′)(R″) where R′ and R″ are each independently a hydrogen atom or a C 1-12 alkyl group; where R 1 and R 2 are each independently a hydrogen atom, a C 1-12 linear alkyl group, a C 1-12 branched alkyl group or a C 1-12 alkoxy group; Y is phenylene, naphthalene or anthracene; R is a hydrogen atom, a C 1-12 linear alkyl group, a C 1-12 branched alkyl group, a C 1-12 alkoxy group or a C 5-30 cycloalkyl group, or a C 6-14 aromatic group which is unsubstituted or substituted with at least one of a C 1-12 alkyl group, a C 1-12 alkoxy group, and —N(R′)(R″) where R′ and R″ are independently a hydrogen atom or a C 1-12 alkyl group.