Patent ID: 7749618

Claim:
An organic electroluminescent device comprising: a pair of electrodes including a positive electrode and a negative electrode, at least one of which is transparent or translucent; and one or a plurality of organic compound layers interposed between the pair of electrodes, at least one layer of the organic compound layers containing at least one charge transporting polyester having a repeating unit that contains at least one selected from structures represented by the following formula (I-1) as a partial structure: wherein in the formula (I-1), R 1 and R 2 each independently represent a mono-valent straight chain hydrocarbon group having 1 to 10 carbon atoms, a mono-valent branched chain hydrocarbon group having 3 to 10 carbon atoms, a substituted or unsubstituted mono-valent phenylene group, a substituted or unsubstituted mono-valent polynuclear aromatic hydrocarbon having 2 to 10 aromatic rings, a substituted or unsubstituted mono-valent condensed aromatic hydrocarbon having 2 to 10 aromatic rings, or a substituted or unsubstituted mono-valent aromatic heterocycle; T represents a divalent straight chain hydrocarbon group having 1 to 10 carbon atoms or a divalent branched chain hydrocarbon group having 2 to 10 carbon atoms; a represents an integer from 1 to 4; b represents an integer from 0 to 3.