IP Library Granted Patent US 7,189,989
Granted Patent B2
US 7,189,989 · App. 10/644,830 · Granted Mar 13, 2007

Light emitting element

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Quick Facts
Patent No.
US 7,189,989
App. No.
10/644,830
Granted
Mar 13, 2007
Kind
B2
Abstract

This present invention provides a light emitting element comprising at least one organic layer containing a light emitting layer provided between a pair of electrodes, and in this structure, at least one layer of the at least one organic layer contains at least one compound consisting essentially of carbon, fluorine and nitrogen.

Claims (32)

1. A light emitting element comprising at least one organic layer which includes a light emitting layer, and which is disposed between a pair of electrodes, wherein at least one layer of the at least one organic layer contains at least one compound consisting essentially of carbon, fluorine and nitrogen, and wherein the compound contains hydrogen atoms in an amount not greater than one hydrogen atom per six carbon atoms; wherein the compound is a compound represented by the following general formula (I):

wherein in general formula (I), each of Ar 1 , Ar 2 and Ar 3 represents an aryl group consisting of carbon and fluoride.

2. The light emitting element of claim 1 , wherein each of Ar 1 , Ar 2 and Ar 3 in the general formula (I) is selected from the group consisting of a perfluorophenyl group, a perfluorobiphenyl group, a perfluoronaphthyl group, a perfluoroanthracenyl group, a perfluorophenanthryl group, a perfluoropyrenyl group, a perfluoronaphthacenyl group and a perfluoroperylenyl group.

3. The light emitting element of claim 1 , wherein the compound has a glass transition temperature in a range of 130° C. to 400° C.

4. The light emitting element of claim 1 , wherein light emission from an excited triplet state is utilized.

5. The light emitting element of claim 4 , wherein when light emission from an excited triplet state is utilized, the compound has a minimum excitation triplet energy level of 65 kcal/mol (272.35 kJ/mol) to 95 kcal/mol (398.05 kJ/mol).

6. The light emitting element of claim 1 , wherein the compound is used as an electron transporting material.

7. The light emitting element of claim 6 , wherein the compound, which is used as an electron transporting material, is contained in an amount of 60 to 100% by mass in an organic layer containing the electron transporting material.

8. The light emitting element of claim 1 , wherein the compound is used as a host material in a layer containing a light emitting material.

9. The light emitting element of claim 8 , wherein the compound, which is used as a host material, is contained in an amount of 50 to 99.9% by mass in an organic layer containing the host material.

10. The light emitting element of claim 1 , wherein the at least one organic layer contains a phosphorescent material.

11. The light emitting element of claim 10 , wherein the phosphorescent material is a transition metal complex.

12. The light emitting element of claim 11 , wherein the transition metal complex is selected from the group consisting of an iridium complex, a platinum complex, a rhenium complex and a ruthenium complex.

13. The light emitting element of claim 12 , wherein the transition metal complex is an iridium complex.

14. The light emitting element of claim 1 , wherein the at least one organic layer is formed by a resistance heating vapor deposition method, a coating method or a transferring method.

15. The light emitting element of claim 1 , wherein the light emitting layer is formed by a coating method.

16. A light emitting element comprising at least one organic layer which includes a light emitting layer, and which is disposed between a pair of electrodes, wherein at least one layer of the at least one organic layer contains at least one compound consisting of carbon, fluorine and nitrogen wherein the compound is a compound represented by the following general formula (I)

wherein in general formula (I), each of Ar 1 , Ar 2 and Ar 3 represents an aryl group consisting of carbon and fluoride.”

17. The light emitting element of claim 12 , wherein each of Ar 1 , Ar 2 and Ar 3 in the general formula (I) is selected from the group consisting of a perfluorophenyl group, a perfluorobiphenyl group, a perfluoronaphthyl group, a perfluoroanthracenyl group, a perfluorophenanthryl group, a perfluoropyrenyl group, a perfluoronaphthacenyl group and a perfluoroperylenyl group.

18. The light emitting element of claim 16 , wherein the compound has a glass transition temperature in a range of 130° C. to 400° C.

19. The light emitting element of claim 16 , wherein light emission from an excited triplet state is utilized.

20. The light emitting element of claim 19 , wherein when light emission from an excited triplet state is utilized, the compound has a minimum excitation triplet energy level of 65 kcal/mol (272.35 kJ/mol) to 95 kcal/mol (398.05 kJ/mol).

21. The light emitting element of claim 16 , wherein the compound is used as an electron transporting material.

22. The light emitting element of claim 21 wherein the compound, which is used as an electron transporting material, is contained in an amount of 60 to 100% by mass in an organic layer containing the electron transporting material.

23. The light emitting element of claim 16 , wherein the compound is used as a host material in a layer containing a light emitting material.

24. The light emitting element of claim 23 , wherein the compound, which is used as a host material, is contained in an amount of 50 to 99.9% by mass in an organic layer containing the host material.

25. The light emitting element of claim 16 , wherein the at least one organic layer contains a phosphorescent material.

26. The light emitting element of claim 25 , wherein the phosphorescent material is a transition metal complex.

27. The light emitting element of claim 26 , wherein the transition metal complex is selected from the group consisting of an iridium complex, a platinum complex, a rhenium complex and a ruthenium complex.

28. The light emitting element of claim 27 , wherein the transition metal complex is an iridium complex.

29. The light emitting element of claim 16 , wherein the at least one organic layer is formed by a resistance heating vapor deposition method, a coating method or a transferring method.

30. The light emitting element of claim 16 , wherein the light emitting layer is formed by a coating method.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 1, 2012
From: FUJIFILM CORPORATION
To: UDC IRELAND LIMITED
Reel/Frame 028889/0636 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 15, 2007
From: FUJIFILM HOLDINGS CORPORATION (FORMERLY FUJI PHOTO FILM CO., LTD.)
To: FUJIFILM CORPORATION
Reel/Frame 018904/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 21, 2003
From: ISE, TOSHIHIRO
To: FUJI PHOTO FILM CO., LTD.
Reel/Frame 014416/0745 →