Light-emitting element, light-emitting device, electronic device, and lighting device

1. A light-emitting element comprising, between a pair of electrodes:

a light-emitting layer, the light-emitting layer including:

a first organic compound;

a second organic compound; and

a phosphorescent compound,

wherein the first organic compound is represented by General Formula (G0),

wherein Ar 1 and Ar 2 each independently represent a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted spirofluorenyl group, or a substituted or unsubstituted biphenyl group,

wherein Ar 3 represents a substituent including a carbazole skeleton,

wherein a molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000, and

wherein the second organic compound is a compound having an electron-transport property.

2. The light-emitting element according to claim 1 ,

wherein the first organic compound is represented by General Formula (G1),

wherein α represents a substituted or unsubstituted phenylene group or a substituted or unsubstituted biphenyldiyl group,

wherein n represents 0 or 1, and

wherein A represents a substituted or unsubstituted 3-carbazolyl group.

3. The light-emitting element according to claim 1 comprising, between the pair of electrodes:

a hole-transport layer in contact with the light-emitting layer,

wherein the first organic compound is included in the hole-transport layer.

4. The light-emitting element according to claim 1 comprising, between the pair of electrodes:

a hole-transport layer in contact with the light-emitting layer,

wherein the first organic compound, the second organic compound, and the phosphorescent compound are included in the light-emitting layer, and

wherein the first organic compound is included in the hole-transport layer.

5. The light-emitting element according to claim 1 ,

wherein the Ar 1 and the Ar 2 each independently represent a substituted or unsubstituted 2-fluorenyl group, a substituted or unsubstituted spiro-9,9′-bifluoren-2-yl group, or a biphenyl-4-yl group.

6. The light-emitting element according to claim 1 , wherein a combination of the first organic compound and the second organic compound forms an exciplex.

7. A light-emitting device comprising the light-emitting element according to claim 1 in a light-emitting portion.

8. An electronic device comprising the light-emitting device according to claim 7 in a display portion.

9. A lighting device comprising the light-emitting device according to claim 7 in a light-emitting portion.

10. A light-emitting element comprising, between a pair of electrodes:

a light-emitting layer, the light-emitting layer including:

a first organic compound;

a second organic compound; and

a phosphorescent compound,

wherein the first organic compound is represented by General Formula (G2),

wherein Ar 1 and Ar 2 each independently represent a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted spirofluorenyl group, or a substituted or unsubstituted biphenyl group,

wherein Ar 4 represents an alkyl group having 1 to 10 carbon atoms, an unsubstituted phenyl group or a phenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, an unsubstituted biphenyl group or a biphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, or an unsubstituted terphenyl group or a terphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms,

wherein R 1 to R 4 and R 11 to R 17 each independently represent hydrogen, an alkyl group having 1 to 10 carbon atoms, an unsubstituted phenyl group or a phenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, or an unsubstituted biphenyl group or a biphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms,

wherein a molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000, and

wherein the second organic compound is a compound having an electron-transport property.

11. The light-emitting element according to claim 10 ,

wherein the first organic compound is represented by General Formula (G3),

wherein R 21 to R 25 independently represent hydrogen, an alkyl group having 1 to 10 carbon atoms, an unsubstituted phenyl group or a phenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, or an unsubstituted biphenyl group or a biphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms.

12. The light-emitting element according to claim 10 comprising, between the pair of electrodes:

a hole-transport layer in contact with the light-emitting layer,

wherein the first organic compound is included in the hole-transport layer.

13. The light-emitting element according to claim 10 comprising, between the pair of electrodes:

a hole-transport layer in contact with the light-emitting layer,

wherein the first organic compound, the second organic compound, and the phosphorescent compound are included in the light-emitting layer, and

wherein the first organic compound is included in the hole-transport layer.

14. The light-emitting element according to claim 10 ,

wherein the Ar 1 and the Ar 2 each independently represent a substituted or unsubstituted 2-fluorenyl group, a substituted or unsubstituted spiro-9,9′-bifluoren-2-yl group, or a biphenyl-4-yl group.

15. The light-emitting element according to claim 10 , wherein a combination of the first organic compound and the second organic compound forms an exciplex.

16. A light-emitting device comprising the light-emitting element according to claim 10 in a light-emitting portion.

17. An electronic device comprising the light-emitting device according to claim 16 in a display portion.

18. A lighting device comprising the light-emitting device according to claim 16 in a light-emitting portion.