Patent ID: 11903308
Assignee: IDEMITSU KOSAN CO., LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 3:
4. The organic electroluminescent device according to claim 1, wherein:
the aromatic hydrocarbon having 6 to 30 ring carbon atoms of the substituted or unsubstituted, (n+1)-valent residue of the aromatic hydrocarbon having 6 to 30 ring carbon atoms represented by A1 is a benzene, a biphenyl, a naphthalene or a phenanthrene, and
the aromatic heterocyclic compound having 5 to 30 ring atoms of the substituted or unsubstituted, (n+1)-valent residue of the aromatic heterocyclic compound having 5 to 30 ring atoms represented by A1 is a pyridine, a dibenzofuran, a dibenzothiophene, a carbazole or a benzonitrile.