Organic electroluminescence element, lighting device and display device
View Patent ↗Provided is an organic electroluminescence element containing an anode, a cathode and a plurality of organic layers including a light emitting layer sandwiched between the anode and the cathode, wherein at least one of the organic layers contains: a blue phosphorescence organic metal complex which is coordinated with a ligand having a structure represented by Formula (1); and a compound represented by Formula (H1), provided that Formula (H1) includes a structure represented by Formula (H2),
1. An organic electroluminescence element comprising an anode, a cathode and a plurality of organic layers including a light emitting layer sandwiched between the anode and the cathode,
wherein at least one of the plurality of organic layers contains:
a blue phosphorescence organic metal complex represented by Formula (2-1); and
a compound represented by Formula (H1),
wherein, Ar represents an aromatic hydrocarbon ring, an aromatic heterocycle, a non-aromatic hydrocarbon ring, or a non-aromatic heterocycle; R 1 and R 2 each respectively represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, an alkynyl group, an alkoxyl group, an amino group, a silyl group, an arylalkyl group, an aryl group, a heteroaryl group, a non-aromatic hydrocarbon ring group, or a non aromatic heterocyclic group, provided that these groups may have a substituent, and that at least one of R 1 and R 2 is an alkyl group having 2 or more carbon atoms or a cycloalkyl group; R a , R b and R c , each respectively represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, an alkynyl group, an alkoxyl group, an amino group, a silyl group, an arylalkyl group, an aryl group, a heteroaryl group, a non-aromatic hydrocarbon ring group, or a non-aromatic heterocyclic group, provided that these groups may have a substituent; na and nc each respectively represent an integer of 1 or 2; and nb represents an integer of 1 to 4; L′ represents a monoanionic bidentate ligand which is coordinated to M; M represents Ir; m′ represents an integer of 0 to 2, n′ represents an integer of 1 to 3, provided that m′+n′ is equal to 3,
Q m -L n Formula (H1)
wherein, L is a condensed aromatic heterocycle which may have a substituent; Q is an aromatic hydrocarbon ring or aromatic heterocycle which may have a substituent; n and m each respectively represent an integer of 1 to 3, provided that when n is 2 or more, a plurality of Ls may be the same or different with each other, when m is 2 or more, a plurality of Qs may be the same or different with each other, provided that the compound represented by Formula (H1) includes a structure represented by
wherein, A represents an oxygen atom, a sulfur atom, NR′, or CR″═CR″; A 12 to A 23 each respectively represent a nitrogen atom or CR″, R′ and R″ each respectively represent a linking position, a hydrogen atom, or a substituent, provided that when there are a plurality of CR″s, each CR″ may be the same or different, and the plurality of CR″s may be joined to form a ring.
2. The organic electroluminescence element of claim 1 , wherein, Formula (H1) is further represented by any one of Formulas (H3) to (H102),
3. The organic electroluminescence element of claim 1 ,
wherein, A in Formula (H2) represents an oxygen atom, a sulfur atom, or NR′.
4. The organic electroluminescence element of claim 1 ,
wherein, L in Formula (H1) is further represented by Formula (H2′),
wherein, A′ represents an oxygen atom, a sulfur atom, or NR′″; A′ 11 to A′ 18 each respectively represent a nitrogen atom or CR″″, R′″ and R″″ each respectively represent a linking position, a hydrogen atom, or a substituent, provided that when there are a plurality of CR″″s, each CR″″ may be the same or different, and the plurality of CR″″s may be joined to form a ring.
5. The organic electroluminescence element of claim 4 ,
wherein all of A′ 11 to A′ 18 in Formula (H2′) represent CR″″.
6. The organic electroluminescence element of claim 1 ,
wherein, R 1 and R 2 in Formula (1) represents an alkyl group having 2 or more carbon atoms or a cycloalkyl group.
7. The organic electroluminescence element of claim 1 ,
wherein, at least one of R 1 and R 2 in Formula (1) represents a branched alkyl group having 3 or more carbon atoms.
8. The organic electroluminescence element of claim 1 ,
wherein, both R 1 and R 2 in Formula (1) represent a branched alkyl group having 3 or more carbon atoms.
9. The organic electroluminescence element of claim 1 ,
wherein, Ar in Formula (1) represents a benzene ring.
10. An organic electroluminescence element comprising an anode, a cathode, and a plurality of organic layers including a light emitting layer sandwiched between the anode and the cathode,
wherein at least one of the plurality of organic layers contains:
a blue phosphorescence organic metal complex represented by Formula (2-1); and
a compound represented by Formula (H1),
wherein, Ar represents an aromatic hydrocarbon ring, an aromatic heterocycle, a non-aromatic hydrocarbon ring, or a non-aromatic heterocycle; R 1 and R 2 each respectively represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, an alkynyl group, an alkoxyl group, an amino group, a silyl group, an arylalkyl group, an aryl group, a heteroaryl group, a non-aromatic hydrocarbon ring group, or a non-aromatic heterocyclic group; provided that these groups may have a substituent, and that at least one of R 1 and R 2 is an alkyl group having 2 or more carbon atoms or a cycloalkyl group; Ra, Rb and Rc each respectively represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, an alkynyl group, an alkoxyl group, an amino group, a silyl group, an arylalkyl group, an aryl group, a heteroaryl group, a non- aromatic hydrocarbon ring group, or a non-aromatic heterocyclic group, provided that these groups may have a substituent; na and nc each respectively represent an integer of 1 or 2; and nb represents an integer of 1 to 4; L′represents a monoanionic bidentate ligand which is coordinated to M; M represents Ir; m′represents an integer of 0 to 2, n′ represents an integer of 1 to 3, provided that m′+n′ is equal to 3,
Q m -L n Formula (H1)
wherein, L is a condensed aromatic heterocycle which may have a substituent, at least one of Ls represents a carbazole ring; Q is an aromatic hydrocarbon ring or aromatic heterocycle which may have a substituent; n represent an integer of 2 or 3, and m represent an integer of 1 to 3, a plurality of Ls may be the same or different with each other, provided that when m is 2 or more, a plurality of Qs may be the same or different with each other, provided that the compound represented by Formula (H1) includes a structure represented by Formula (H2),
wherein, A represents an oxygen atom, a sulfur atom, NR″, or CR″═CR″; A 11 to A 23 each respectively represent a nitrogen atom or CR″, R′ and R″ each respectively represent a linking position, a hydrogen atom, or a substituent, provided that when there are a plurality of CR″s, each CR″ may be the same or different, and the plurality of CR″s may be joined to form a ring.
11. The organic electroluminescence element of claim 10 , wherein, Formula (H1) is further represented by any one of Formulas (H3) to (H102),
12. The organic electroluminescence element of claim 10 ,
wherein, A in Formula (H2) represents an oxygen atom, a sulfur atom, or NR′.
13. The organic electroluminescence element of claim 10 , wherein, L in Formula (H1) is further represented by Formula (H2′),
wherein, A′ represents an oxygen atom, a sulfur atom, or NR″′; A′ 11 to A′ 18 each respectively represent a nitrogen atom or CR″″, R′″ and R″″ each respectively represent a linking position, a hydrogen atom, or a substituent, provided that when there are a plurality of CR″″s, each CR″″ may be the same or different, and the plurality of CR″″s may be joined to form a ring.
14. The organic electroluminescence element of claim 13 ,
wherein all of A′ 11 to A′ 18 in Formula (H2′) represent CR″″.
15. The organic electroluminescence element of claim 10 ,
wherein, R 1 and R 2 in Formula (1) represents an alkyl group having 2 or more carbon atoms or a cycloalkyl group.
16. The organic electroluminescence element of claim 10 ,
wherein, at least one of R 1 and R 2 in Formula (1) represents a branched alkyl group having 3 or more carbon atoms.
17. The organic electroluminescence element of claim 10 ,
wherein, both R 1 and R 2 in Formula (1) represent a branched alkyl group having 3 or more carbon atoms.
18. The organic electroluminescence element of claim 10 ,
wherein, Ar in Formula (1) represents a benzene ring.