| 主权项 |
1. An organic electroluminescence device comprising:
an anode; a cathode; and at least an emitting layer interposed between the anode and the cathode, wherein the emitting layer comprises a first host material, a second host material and a phosphorescent dopant material as main components, the first host material is a compound represented by a formula (1) below, and the second host material is represented by a formula (2) below,where:
Z1 to be fused at a represents a cyclic structure represented by the following formula (1-1) or (1-2); Z2 to be fused at b represents a cyclic structure represented by the following formula (1-1) or (1-2); at least one of Z1 and Z2 is represented by the formula (1-1); M is a substituted or unsubstituted nitrogen-containing heteroaromatic ring having 2 to 40 ring carbon atoms; L1 is a single bond or a linking group and represents as the linking group a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 2 to 30 ring carbon atoms, a cyclic hydrocarbon group having 5 to 30 ring carbon atoms, or a group provided by bonding the aromatic hydrocarbon group, the aromatic heterocyclic group and the cyclic hydrocarbon group; and m is 1 or 2,where:
c, d, e and f are fused to a or b in the formula (1); R11 and R31 each independently represent a hydrogen atom, a fluorine atom, a cyano group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted alkylsilyl group having 1 to 10 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group having 2 to 30 ring carbon atoms; a plurality of R11 are optionally mutually the same or different; a plurality of R31 are optionally mutually the same or different; X3 represents a sulfur atom, an oxygen atom or N—R32; and R32 represents the same described above as R11 and R31, X2 represents a sulfur atom, an oxygen atom or N—R5; L2 is a single bond or a linking group and represents the same as L1 in the formula (1); R2 and R3 each independently represent a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group having 2 to 30 ring carbon atoms; R4 and R5 are the same as R11 and R31 in the formulae (1-1) and (1-2); p and q represent an integer of 0 to 2 and r represents an integer of 1 to 3, provided that p+q+r=3; s represents an integer 1 to 4; and when s is an integer of 2 to 4, a plurality of R4 are optionally the same or different. |
