Organic electroluminescent element, compound and material for organic electroluminescent element, used in the same, and light emitting device, display device and illumination device, using the element
An organic electroluminescent element comprising a substrate, a pair of electrodes including an anode and a cathode, disposed on the substrate, and at least one organic layer which is arranged between the electrodes and which includes a light emitting layer, wherein the organic layer contains a compound represented by general formula (1) in at least one layer. The organic electroluminescent element has a high luminous efficiency, excellent blue color purity, and little chromaticity change due to drive deterioration. (In the formula, the two Xs either both represent an O atom or both represent an S atom, and R 1 -R 10 each independently represents a hydrogen atom or a substituent group).
1. An organic electroluminescent element, comprising:
a substrate;
a pair of electrodes including an anode and a cathode, disposed on the substrate; and
at least one organic layer which is arranged between the electrodes and which includes a light emitting layer;
wherein the organic layer contains a compound expressed by general formula (1) in at least one layer:
wherein in general formula (1), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, R 1 through R 10 independently represent a hydrogen atom or a substitution group, and R 1 through R 10 may jointly form a ring; however, if the two X's represent sulfur atoms, at least one of R 2 , R 3 , R 5 , and R 6 represents a substitution group.
2. The organic electroluminescent element according to claim 1 , wherein the compound expressed by general formula (1) is expressed by general formula (2):
wherein in general formula (2), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, R 1 through R 6 independently represent a hydrogen atom or a substitution group, and R 1 through R 6 may jointly form a ring; Q and Q′ independently represent an aromatic five membered ring or an aromatic six-membered ring; however, if the two X's represent sulfur atoms, at least one of R 2 , R 3 , R 5 , and R 6 represents a substitution group.
3. The organic electroluminescent element according to claim 2 , wherein the compound expressed by general formula (2) is expressed by general formula (3):
wherein in general formula (3), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, R 1 through R 6 independently represent a hydrogen atom or a substitution group, and R 1 through R 6 may jointly form a ring R 11 through R 18 independently represent a hydrogen atom or a substitution group; A 1 through A 8 independently represent a carbon atom or a nitrogen atom, and if A 1 through A 8 represent a nitrogen atom, R 11 through R 18 that bonds thereto does not exist; however, if the two X's represent sulfur atoms, at least one of R 2 , R 3 , R 5 , and R 6 represents a substitution group.
4. The organic electroluminescent element according to claim 3 , wherein the compound expressed by general formula (3) is expressed by general formula (4):
wherein in general formula (4), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, R 1 through R 6 independently represent a hydrogen atom or a substitution group, and R 1 through R 6 may jointly form a ring; R 11 through R 18 independently represent a hydrogen atom or a substitution group; however, if the two X's represent sulfur atoms, at least one of R 2 , R 3 , R 5 , and R 6 represents a substitution group.
5. The organic electroluminescent element according to claim 4 , wherein in general formula (4), at least one of R 1 through R 6 and R 11 through R 18 is a substitution group containing one of a fluorine atom, alkyl group, silyl group, or amino group.
6. The organic electroluminescent element according to claim 4 , wherein the compound expressed by general formula (4) is expressed by general formula (5):
wherein in general formula (5), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, and R 1 , R 3 , R 4 , and R 6 independently represent a hydrogen atom or a substitution group; R 11 through R 28 independently represent a hydrogen atom or a substitution group; however, at least one of R 3 through R 6 and R 11 through R 18 is a substitution group containing one of a fluorine atom, alkyl group, silyl group, or amino group, or at least one of R 19 through R 28 is a fluorine atom, alkyl group, silyl group, or amino group.
7. The organic electroluminescent element according to claim 6 , wherein in general formula (5), R 13 is a substitution group.
8. The organic electroluminescent element according to claim 6 , wherein the compound expressed by general formula (5) is expressed by general formula (6):
wherein in general formula (6), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, and R 1 , R 3 , R 4 , and R 6 independently represent a hydrogen atom or a substitution group; R 11 through R 38 independently represent a hydrogen atom or a substitution group.
9. The organic electroluminescent element according to claim 4 , wherein the compound expressed by general formula (4) is expressed by general formula (7):
wherein in general formula (7), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, and R 1 , R 2 , R 4 , and R 5 independently represent a hydrogen atom or a substitution group; a ring may be jointly formed by a plurality of R 1 , R 2 , R 4 , and R 5 ; R 11 through R 48 independently represent a hydrogen atom or a substitution group.
10. The organic electroluminescent element according to claim 9 , wherein in general formula (7), R 13 is a substitution group.
11. The organic electroluminescent element according to claim 9 , wherein the compound expressed by general formula (7) is expressed by general formula (8):
wherein in general formula (8), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, and R 1 , R 2 , R 4 , and R 5 independently represent a hydrogen atom or a substitution group; a ring may be jointly formed by a plurality of R 1 , R 2 , R 4 , and R 5 ; R 11 through R 58 independently represent a hydrogen atom or a substitution group.
12. The organic electroluminescent element according to claim 4 , wherein the compound expressed by general formula (4) is expressed by general formula (9):
wherein in general formula (9), the two X's represent the same linking group, and either both represent oxygen atoms or both represent sulfur atoms, and R 1 through R 6 independently represent a hydrogen atom or a substitution group; a ring may be jointly formed by a plurality of R 1 through R 6 ; R 11 through R 78 independently represent a hydrogen atom or a substitution group.
13. The organic electroluminescent element according to claim 12 , wherein in general formula (9), at least one of R 2 , R 3 , R 5 , and R 6 is a substitution group.
14. The organic electroluminescent element according to claim 1 , where in general formula (1), both X's represent oxygen atoms.
15. The organic electroluminescent element according to claim 1 , wherein at least one layer of the organic layer containing the compound expressed by general formula (1) is a light emitting layer.
16. The organic electroluminescent element according to claim 1 , wherein the light emitting layer is formed using a vacuum vapor deposition process.
17. The organic electroluminescent element according to claim 1 , wherein the light emitting layer is formed using a wet process.
18. A light emitting device comprising the organic electroluminescent element according to claim 1 .
19. A display device comprising the organic electroluminescent element according to claim 1 .
20. A lighting device comprising the organic electroluminescent element according to claim 1 .