Patent ID: 8435646

Claim:
An organic electroluminescent device comprising an anode and a cathode, at least one of which is transparent or translucent, and an organic compound layer disposed between the anode and the cathode, the organic compound layer having two or more layers including at least a buffer layer and an emitting layer, at least one of the organic compound layers other than the buffer layer containing at least one charge-transporting polyester represented by the following Formula (I-1) or (I-2); the buffer layer being provided in contact with the anode and containing a crosslinked compound formed by using at least one charge injection material containing a substituted silicon group represented by the following Formula (III); and the charge injection material being at least one aromatic amine compound represented by any one of the following Formulae (IV-1) to (IV-4): in Formulae (I-1) and (I-2), A representing at least one structure selected from the structures represented by the following Formulae (II-1) and (II-2); R representing a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; Y representing a dihydric alcohol residue; Z representing a divalent carboxylic acid residue; B and B′ each independently representing a group —O—(Y—O) n —R or a group —O—(Y—O) n —CO-Z—CO—O—R′, when, R, Y, and Z are the same as those described above; R′ represents an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n is an integer of 1 to 5; n being an integer of 1 to 5; and p being an integer of 5 to 5,000, in Formulae (II-1) and (II-2), Ar representing a substituted or unsubstituted monovalent aromatic group; X representing a substituted or unsubstituted divalent aromatic group; k, m, and 1 each being 0 or 1; T representing a divalent straight-chain hydrocarbon having 1 to 6 carbon atoms or a branched hydrocarbon having 2 to 10 carbon atoms, —Si(R 1 ) 3-a Q a (III) in Formula (III), R 1 representing a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group; Q representing a hydrolytic group; and a being an integer of 1 to 3, and in Formulae (IV-1) to (IV-4), Ar represents a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon having 2 to 10 aromatic rings, a substituted or unsubstituted monovalent aromatic heterocyclic ring, or a substituted or unsubstituted monovalent aromatic group containing at least one aromatic heterocyclic ring; Ra represents at least one substituted silicon group represented by the Formula (III); m and 1 are 0 or 1; and T represents a divalent straight-chain hydrocarbon having 1 to 6 carbon atoms or a branched hydrocarbon having 2 to 10 carbon atoms.