Patent ID: 7910748

Claim:
An organic electroluminescent device comprising a pair of electrodes composed of an anode and a cathode, and one or more organic compound layers disposed therebetween, at least one of the anode or the cathode being transparent or semitransparent; at least one of the organic compound layers including a charge-transporting polyester having a repeating structure containing at least one structure selected from the structures represented by the following formulae (I-1) and (I-2) as a partial structure: in formulae (I-1) and (I-2), Ar representing an unsubstituted monovalent phenyl group, an unsubstituted monovalent polynuclear aromatic hydrocarbon having 2 to 10 aromatic rings, an unsubstituted monovalent fused aromatic hydrocarbon having 2 to 10 aromatic rings, or an unsubstituted monovalent aromatic heterocyclic ring; X representing a group represented by the following formula (II); T representing a bivalent straight-chain hydrocarbon group having 1 to 6 carbon atoms; k representing O; and l representing 1: in formula (II), R 1 and R 2 each independently representing a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n representing an integer of 1 to 10.