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

Claim 8:
9. An organic electroluminescent device, comprising:
a cathode, an anode, and organic layers disposed between the cathode and the anode, wherein:
the organic layers comprise a light-emitting layer, and a first layer disposed between the light-emitting layer and the cathode, and
the first layer comprises a compound of formula (2):, wherein:
R1 to R24 each independently represent a hydrogen atom, or a substituent, and the substituent is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms,
R31 to R35 each independently represent a hydrogen atom,
R41 to R42 each are independently same as R1,
m represents 0 or 1,
when m is 0, X is absent, and the two benzene rings are not crosslinked,
when m is 1, X is O or S,
p represents an integer of 0 to 5,
q represents an integer of 0 to 4.