Fluorene compound, light-emitting element, light-emitting device, electronic device, lighting device, and organic compound
A substance having a hole-transport property and a wide band gap is provided. A fluorene compound represented by a general formula (G1) is provided. In the general formula (G1), α 1 and α 2 separately represent a substituted or unsubstituted arylene group having 6 to 13 carbon atoms; Ar 1 represents a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted 4-dibenzothiophenyl group, or a substituted or unsubstituted 4-dibenzofuranyl group; n and k separately represent 0 or 1; Q 1 represents sulfur or oxygen; and R 1 to R 15 separately represent hydrogen, an alkyl group having 1 to 12 carbon atoms, or an aryl group having 6 to 14 carbon atoms.
1. A fluorene compound represented by a general formula (G1),
wherein α 1 represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
wherein α 2 represents an unsubstituted arylene group having 6 to 13 carbon atoms or a substituted arylene group having 6 to 13 carbon atoms which is substituted by an unsubstituted alkyl group having 1 to 12 carbon atoms,
wherein Ar 1 represents a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted 4-dibenzothiophenyl group, or a substituted or unsubstituted 4-dibenzofuranyl group,
wherein n represents 0 or 1,
wherein k represents 1,
wherein Q 1 represents sulfur or oxygen, and
wherein R 1 to R 15 separately represent hydrogen, an unsubstituted alkyl group having 1 to 12 carbon atoms, or an unsubstituted aryl group having 6 to 14 carbon atoms.
2. The fluorene compound according to claim 1 , wherein the R 1 to R 15 are separately represented by any one of structural formulae (R-1) to (R-14),
3. The fluorene compound according to claim 1 , wherein the α 1 and α 2 are separately represented by any one of structural formulae (α-1) to (α-7),
4. The fluorene compound according to claim 1 ,
wherein the α 1 has a substituent selected from an alkyl group having 1 to 12 carbon atoms and an aryl group having 6 to 14 carbon atoms.
5. The fluorene compound according to claim 1 ,
wherein the Ar 1 is represented by any one of structural formulae (Ar 1 -1) to (Ar 1 -21), and
wherein Q 2 represents sulfur or oxygen.
6. The fluorene compound according to claim 1 ,
wherein the Ar 1 represents an aryl group having 6 to 18 carbon atoms and having one or more substituents, a 4-dibenzothiophenyl group having one or more substituents, or a 4-dibenzofuranyl group having one or more substituents, and
wherein the one or more substituents are separately an alkyl group having 1 to 12 carbon atoms or an aryl group having 6 to 14 carbon atoms.
7. The fluorene compound according to claim 1 , wherein the α 2 represents an unsubstituted arylene group having 6 carbon atoms or a substituted arylene group having 6 carbon atoms which is substituted by an unsubstituted alkyl group having 1 to 12 carbon atoms.
8. A light-emitting element comprising:
an anode;
a cathode; and
a layer comprising a fluorene compound between the anode and the cathode,
wherein the fluorene compound is represented by a general formula (G1),
wherein α 1 represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
wherein α 2 represents an unsubstituted arylene group having 6 to 13 carbon atoms or a substituted arylene group having 6 to 13 carbon atoms which is substituted by an unsubstituted alkyl group having 1 to 12 carbon atoms,
wherein Ar 1 represents a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted 4-dibenzothiophenyl group, or a substituted or unsubstituted 4-dibenzofuranyl group,
wherein n represents 0 or 1,
wherein k represents 1,
wherein Q 1 represents sulfur or oxygen, and
wherein R 1 to R 15 separately represent hydrogen, an unsubstituted alkyl group having 1 to 12 carbon atoms, or an unsubstituted aryl group having 6 to 14 carbon atoms.
9. The light-emitting element according to claim 8 , wherein the layer comprising the fluorene compound is in contact with the anode.
10. A light-emitting device comprising the light-emitting element according to claim 8 .
11. An electronic device comprising the light-emitting device according to claim 10 .
12. A lighting device comprising the light-emitting device according to claim 10 .
13. The light-emitting element according to claim 8 , wherein the α 2 represents an unsubstituted arylene group having 6 carbon atoms or a substituted arylene group having 6 carbon atoms which is substituted by an unsubstituted alkyl group having 1 to 12 carbon atoms.
14. A fluorene compound represented by a general formula (G1),
wherein α 1 represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
wherein α 2 represents an unsubstituted arylene group having 6 to 13 carbon atoms,
wherein Ar 1 represents a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted 4-dibenzothiophenyl group, or a substituted or unsubstituted 4-dibenzofuranyl group,
wherein n represents 0 or 1,
wherein k represents 1,
wherein Q 1 represents sulfur or oxygen, and
wherein R 1 to R 15 separately represent hydrogen, an unsubstituted alkyl group having 1 to 12 carbon atoms, or an unsubstituted aryl group having 6 to 14 carbon atoms.
15. The fluorene compound according to claim 14 , wherein the fluorene compound is represented by any one of structural formulae (103), (106), (111), (141), and (231),
16. A light-emitting element comprising the fluorene compound according to claim 14 , the light-emitting element comprising:
an anode;
a cathode; and
a layer comprising the fluorene compound between the anode and the cathode.
17. The light-emitting element according to claim 16 , wherein the layer comprising the fluorene compound is in contact with the anode.
18. A light-emitting device comprising the light-emitting element according to claim 16 .
19. An electronic device comprising the light-emitting device according to claim 18 .
20. A lighting device comprising the light-emitting device according to claim 18 .
21. The fluorene compound according to claim 14 , wherein the α 2 represents an unsubstituted arylene group having 6 carbon atoms.