Organic electroluminescent device

An organic electroluminescent device comprising one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers comprises a first host selected from compounds represented by the following general formula (1), a second host selected from compounds represented by the following general formula (2), and, as a light emitting dopant, a polycyclic aromatic compound represented by the following general formula (3) or a polycyclic aromatic compound having a structure represented by the general formula (3) as a substructure:

• wherein Z is an indolocarbazole ring-containing group represented by the general formula (1a), * is a bonding site to L1,
• the ring A is a heterocyclic ring represented by formula (1b), and the nitrogen-containing five-membered ring in formula (1b) is condensed with the two adjacent benzene rings in formula (1a),
• L1 and L2 are each independently a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbons,
• Ar1 and Ar2 are each independently a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms, or a linked aromatic group formed by linking 2 to 8 of these groups,
• R1 is each independently an aliphatic hydrocarbon group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms,
• a represents an integer of 1 to 3, b represents an integer of 0 to 3, and c and d each independently represent an integer of 0 to 4, e represents an integer of 0 to 2, and f represents an integer of 0 to 3,
• wherein X1 each independently represents N or CH, and at least one X1 represents N;
• Ar3 each independently represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms, or a linked aromatic group formed by linking 2 to 8 aromatic rings thereof,
• wherein the C ring, the D ring, and the E ring are each independently a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 24 carbon atoms or a substituted or unsubstituted aromatic heterocyclic ring having 3 to 17 carbon atoms,
• Y4 is B, P, P═O, P═S, Al, Ga, As, Si—R4 or Ge—R5,
• R4 and R5 are each independently an aliphatic hydrocarbon group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms,
• X4 is each independently O, N—Ar4, S or Se,
• Ar4 is each independently a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms, or a linked aromatic group formed by linking 2 to 8 of these groups, N—Ar4 is optionally bonded to any of the C ring, the D ring, or the E ring to form a heterocyclic ring containing N,
• R3 each independently represents a cyano group, deuterium, a diarylamino group having 12 to 44 carbon atoms, an arylheteroarylamino group having 12 to 44 carbon atoms, a diheteroarylamino group having 12 to 44 carbon atoms, an aliphatic hydrocarbon group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms,
• at least one hydrogen atom in the C ring, the D ring, the E ring, R3, R4, R5, and Ar4 is optionally replaced with a halogen or deuterium atom, and
• v each independently represents an integer of 0 to 4, and x represents an integer of 0 to 3.