Patent ID: 8264140

Claim:
An organic electroluminescence element comprising a pair of electrodes composed of an anode and a cathode, at Least one of which is transparent or semitransparent, and one or more organic compound layers disposed between the pair of electrodes, at least one of the organic compound layers comprising at least one charge-transporting polyester consisting of repeating units containing, as a partial structure, at least one structure represented by the following formula (I-1): in the formula (I-1), R 1 , R 2 , R 3 and R 4 each independently representing a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, a substituted or unsubstituted monovalent phenyl group, a halogen atom, a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon group having 2 to 10 aromatic rings, a substituted or unsubstituted monovalent condensed aromatic hydrocarbon group having 2 to 10 aromatic rings, or a substituted or unsubstituted monovalent aromatic heterocyclic group; Ar representing a substituted or unsubstituted monovalent phenyl group, a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon group having 2 to 10 aromatic rings, a substituted or unsubstituted monovalent condensed polycyclic aromatic hydrocarbon group having 2 to 10 aromatic rings, a substituted or unsubstituted monovalent aromatic heterocyclic group, or a monovalent aromatic group containing at least one aromatic heterocycle; T representing a divalent linear hydrocarbon group having 1 to 10 carbon atoms or a divalent branched hydrocarbon group having 2 to 10 carbon atoms; and x representing an integer of 3 and m representing an integer of 0 to 3 or x representing an integer of 1 to 3 and m representing an integer of 2 to 3.