Triarylamine derivative, light-emitting substance, light-emitting element, light-emitting device, and electronic device
A triarylamine derivative represented by a general formula (G1) given below is provided. Note that in the formula, Ar represents either a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group; α represents a substituted or unsubstituted naphthyl group; β represents either hydrogen or a substituted or unsubstituted naphthyl group; n and m each independently represent 1 or 2; and R 1 to R 8 each independently represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, or a phenyl group.
1. A light-emitting device comprising:
a first electrode;
a second electrode;
a light-emitting layer comprising a light-emitting material between the first electrode and the second electrode;
a first layer comprising a first compound between the first electrode and the light-emitting layer; and
a second layer comprising a second compound between the second electrode and the light-emitting layer,
wherein the second compound comprises at least one of a metal complex, an oxadiazole skeleton, a triazole skeleton, bathophenanthroline, and bathocuproine,
wherein the first compound is represented by a general formula (G1),
wherein Ar represents any of substituents represented by structural formulae (Ar-1) to (Ar-4),
wherein α represents a first naphthyl group,
wherein when the first naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein β represents hydrogen or a second naphthyl group,
wherein when the second naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein n and m each independently represent 1 or 2, and
wherein R 1 to R 8 each independently represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, and a phenyl group.
2. The light-emitting device according to claim 1 , wherein the first naphthyl group is represented by structural formulae (α-1) or (α-2),
3. The light-emitting device according to claim 1 , wherein the second naphthyl group is represented by structural formulae (β-2) or (β-3),
4. The light-emitting device according to claim 1 , wherein each of n and m in the general formula (G1) represents 1.
5. The light-emitting device according to claim 1 , wherein the light-emitting material is a fluorescent light-emitting material.
6. The light-emitting device according to claim 1 , wherein the light-emitting material is a phosphorescent light-emitting material.
7. A light-emitting device comprising:
a first electrode;
a second electrode; and
a composite material between the first electrode and the second electrode,
wherein the composite material comprises a first organic compound and a second organic compound,
wherein the second organic compound comprises at least one of a cyano group and a fluoro group,
wherein the first organic compound is represented by a general formula (G1):
wherein Ar represents any of substituents represented by structural formulae (Ar-1) to (Ar-4):
wherein α represents a first naphthyl group,
wherein when the first naphthyl group has a substituent, the substituent is a phenyl group,
wherein β represents hydrogen or a second naphthyl group,
wherein when the second naphthyl group has a substituent, the substituent is a phenyl group,
wherein n and m each independently represent 1 or 2, and
wherein R 1 to R 8 each independently represent hydrogen or a phenyl group.
8. A light-emitting device comprising:
a first electrode;
a second electrode;
a light-emitting layer comprising a light-emitting material between the first electrode and the second electrode; and
a layer between the first electrode and the light-emitting layer,
wherein the layer comprises a first organic compound and a second organic compound,
wherein the second organic compound comprises at least one of a cyano group and a fluoro group,
wherein the first organic compound is represented by a general formula (G1):
wherein Ar represents any of substituents represented by structural formulae (Ar-1) to (Ar-4):
wherein α represents a first naphthyl group,
wherein when the first naphthyl group has a substituent, the substituent is a phenyl group,
wherein β represents hydrogen or a second naphthyl group,
wherein when the second naphthyl group has a substituent, the substituent is a phenyl group,
wherein n and m each independently represent 1 or 2, and
wherein R 1 to R 8 each independently represent hydrogen or a phenyl group.
9. The light-emitting device according to claim 7 , wherein the first naphthyl group is represented by structural formulae (α-1) or (α-2):
10. The light-emitting device according to claim 7 , wherein the second naphthyl group is represented by structural formulae (β-2) or (β-3):
11. The light-emitting device according to claim 7 , wherein each of n and m in the general formula (G1) represents 1.
12. The light-emitting device according to claim 7 , wherein β represents hydrogen.
13. The light-emitting device according to claim 7 , wherein R 3 represents the phenyl group.
14. The light-emitting device according to claim 8 , wherein R 3 the first naphthyl group is represented by structural formulae (α-1) or (α-2):
15. The light-emitting device according to claim 8 , wherein the second naphthyl group is represented by structural formulae (β-2) or (β-3):
16. The light-emitting device according to claim 8 , wherein each of n and m in the general formula (G1) represents 1.
17. The light-emitting device according to claim 8 , wherein β represents hydrogen.
18. The light-emitting device according to claim 8 , wherein R 3 represents the phenyl group.
19. The light-emitting device according to claim 8 , wherein the light-emitting material is a fluorescent light-emitting material.
20. The light-emitting device according to claim 8 , wherein the light-emitting material is a phosphorescent light-emitting material.