Light-emitting element, light-emitting device, and electronic appliance
View Patent ↗By use of a 2,9,10-triaryl anthracene derivative in which a diarylamino-substituted aryl group is bonded to the 2-position of a 9,10-diarylanthracene for a light-emitting element, a light-emitting element having high efficiency can be obtained. The emission wavelength of the anthracene derivative is suitable for use in a white light-emitting element. By use of the anthracene derivative for a white light-emitting element, a white light-emitting element having high efficiency can be obtained.
1. A light-emitting element comprising:
between a pair of electrodes,
a first light-emitting layer; and
a second light-emitting layer,
wherein:
the first light-emitting layer includes an anthracene derivative represented by a general formula (1); and
the second light-emitting layer includes a second light-emitting substance, and
wherein:
Ar 1 and Ar 2 individually represent an aryl group having 6 to 25 carbon atoms,
Ar 3 represents an arylene group having 6 to 25 carbon atoms;
A represents a substituent represented by a general formula (1-2);
Ar 21 represents an aryl group having 6 to 25 carbon atoms;
R 31 represents any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 25 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms; and
R 32 represents any of an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 25 carbon atoms, and a haloalkyl group having 1 to 4 carbon atoms.
2. The light-emitting element according to claim 1 ,
wherein A represents a substituent represented by a general formula (2-2), and
wherein R 33 to R 37 individually represent any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 15 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms.
3. The light-emitting element according to claim 1 ,
wherein A represents a substituent represented by a general formula (3-2).
4. The light-emitting element according to claim 1 ,
wherein Ar 21 represents any of a phenyl group, a 1-naphthyl group, and a 2-naphthyl group, and
R 31 represents any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and an aryl group having 6 to 25 carbon atoms.
5. The light-emitting element according to claim 1 ,
wherein the anthracene derivative is represented by a general formula (5), and
wherein R 1 to R 10 individually represent any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 15 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms.
6. A light-emitting element comprising:
a first light-emitting element including, a first light-emitting layer and a second light-emitting layer between a first anode and a first cathode; and
a second light-emitting element including a third light-emitting layer and a fourth light-emitting layer between a second anode and a second cathode,
wherein:
the first light-emitting element and the second light-emitting element are connected in series to each other;
the first cathode and the second anode are in contact with each other; and
the first light-emitting layer includes an anthracene derivative represented by a general formula (1), and
wherein:
Ar 1 and Ar 2 individually represent an aryl group having 6 to 25 carbon atoms;
Ar 3 represents an arylene group having 6 to 25 carbon atoms;
A represents any of a substituent represented by a general formula (1-2);
Ar 21 represents an aryl group having 6 to 25 carbon atoms;
R 31 represents any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 25 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms; and
R 32 represents any of an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 25 carbon atoms, and a haloalkyl group having 1 to 4 carbon atoms.
7. The light-emitting element according to claim 6 ,
wherein A represents a substituent represented by a general formula (2-2), and
wherein R 33 to R 37 individually represent any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 15 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms.
8. The light-emitting element according to claim 6 ,
wherein A represents a substituent represented by a general formula (3-2);
9. A light-emitting element according to claim 6 ,
wherein Ar 21 represents any of a phenyl group, a 1-naphthyl group, and a 2-naphthyl group, and R 31 represents any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and an aryl group having 6 to 25 carbon atoms.
10. The light-emitting element according to claim 6 ,
wherein the anthracene derivative is represented by a general formula (5), and
wherein R 1 to R 10 individually represent any of a hydrogen atom, an alkyl group having 1to 4 carbon atoms, an aryl group having 6 to 15 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms.
11. The light-emitting element according to claim 1 ,
wherein the anthracene derivative in which Ar 3 is any of substituents represented by general formulae (11-1) to (11-5) is used, and
wherein R 51 to R 62 individually represent any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 15 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms.
12. The light-emitting element according to claim 6 ,
wherein the anthracene derivative in which Ar 3 is any of substituents represented by general formulae (11-1) to (11-5) is used, and
wherein R 51 to R 62 individually represent any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 15 carbon atoms, a halogen atom, and a haloalkyl group having 1 to 4 carbon atoms.
13. The light-emitting element according to claim 1 ,
wherein Ar 1 and Ar 2 are the same as each other.
14. The light-emitting element according to claim 6 , wherein Ar 1 and Ar 2 are the same as each other.
15. The light-emitting element according to claim 1 ,
wherein an emission color of the anthracene derivative is complement to an emission color of the second light-emitting substance.
16. The light-emitting element according to claim 6 ,
wherein an emission color of the anthracene derivative is complement to an emission color of the second light-emitting layer.
17. The light-emitting element according to claim 6 , wherein an emission color of the third light-emitting layer is complement to an emission color of the fourth light-emitting layer.
18. A light-emitting device comprising the light-emitting element according to claim 1 .
19. A light-emitting device comprising the light-emitting element according to claim 6 .
20. An electronic appliance comprising a display portion,
wherein the display portion includes the light-emitting element according to claim 1 .
21. An electronic appliance comprising a display portion,
wherein the display portion includes the light-emitting element according to claim 6 .
22. The light-emitting element according to claim 1 ,
wherein the light-emitting element is capable of emitting white light.
23. The light-emitting element according to claim 6 ,
wherein the light-emitting element is capable of emitting white light.
24. A lighting apparatus comprising a light-emitting element according to claim 18 .
25. A lighting apparatus comprising a light-emitting element according to claim 19 .
26. The light-emitting element according to claim 6 ,
wherein the first cathode comprises a material and a donor to the material, and
wherein an electron transporting property of the material is larger than a hole transporting property of the material.
27. The light-emitting element according to claim 6 ,
wherein the second anode comprises a material selected from molybdenum oxide, vanadium oxide, rhenium oxide, and ruthenium oxide.
28. The light-emitting element according to claim 6 ,
wherein the second anode is molybdenum oxide, vanadium oxide, rhenium oxide, or ruthenium oxide.
29. The light-emitting element according to claim 6 ,
wherein the second anode comprises a material and an acceptor to the material, and
wherein a hole transporting property of the material is larger than an electron transporting property of the material.
30. The light-emitting element according to claim 6 ,
wherein the second anode comprises a material and an acceptor to the material,
wherein a hole transporting property of the material is larger than an electron transporting property of the material, and
wherein the acceptor is selected from molybdenum oxide, vanadium oxide, rhenium oxide, and ruthenium oxide.