Organic compound, charge-transporting material, composition containing the compound, organic electroluminescent element, display device, and lighting device
View Patent ↗The invention provides an organic compound incorporating a specific structure into a pyridine skeleton or a 1,3,5-triazine skeleton and adapting the molecular weight to a specific range, a composition comprising the organic compound and a solvent, organic electroluminescent element comprising a layer that is formed by using the composition, and the uses thereof.
1. An organic compound which is represented by formula (3), has a molecular weight of 750 or more and 2,000 or less, and has one or no carbazolyl group in the molecule:
wherein
D represents CH or a nitrogen atom;
E and F each independently are selected from substituents represented by formulae (4-1) to (4-6):
—X 6 (4-1)
—Ar 16 —X 7 (4-2)
—Ar 17 —Ar 18 —X 8 (4-3)
—Ar 19 —Ar 20 —Ar 21 —X 9 (4-4)
—Ar 22 —Ar 23 —Ar 24 —Ar 25 —X 10 (4-5)
—Ar 26 —Ar 27 —Ar 28 —Ar 29 —Ar 30 —X 11 (4-6)
wherein Ar 16 represents a 1,2-phenylene group or 1,3-phenylene group, which may have a substituent, Ar 17 to Ar 30 each independently represent a 1,2-phenylene group, 1,3-phenylene group, or 1,4-phenylene group, which may have a substituent, and
X 6 to X 11 each independently represent an aromatic hydrocarbon group which may have a substituent, a carbazolyl group which may have a substituent, a dibenzofuranyl group which may have a substituent, or a dibenzothienyl group which may have a substituent,
with the proviso that E and F each contain at least one of a 1,2-phenylene group and a 1,3-phenylene group;
L represents a direct bond or a divalent aromatic hydrocarbon group which may have a substituent, and forms a bond with any one of the substitution positions of R 1 to R 5 ;
R 1 to R 5 each independently represent a bond with L, a hydrogen atom, a phenyl group which may have a substituent, a dibenzofuranyl group which may have a substituent, a dibenzothienyl group which may have a substituent, an alkyl group, a silyl group, a fluorine atom, or a perfluoroalkyl group; and R 6 to R 18 each represent a hydrogen atom, a phenyl group which may have a substituent, a dibenzofuranyl group which may have a substituent, a dibenzothienyl group which may have a substituent, an alkyl group, a silyl group, a fluorine atom, or a perfluoroalkyl group; with the proviso that when D is represented by a nitrogen atom, E and F are not the same groups.
2. The organic compound according to claim 1 , wherein in formulae (4-3) to (4-6), the substituents represented by Ar 17 to Ar 30 each independently are a 1,3-phenylene group or a 1,4-phenylene group.
3. The organic compound according to claim 1 , wherein in formulae (4-2) to (4-6), the substituents represented by Ar 16 , Ar 18 , Ar 21 , Ar 25 , and Ar 30 are 1,3-phenylene groups.
4. A charge-transporting material which comprises the organic compound according to claim 1 .
5. A composition for organic electroluminescent element which comprises the organic compound according to claim 1 and a solvent.
6. An organic electroluminescent element which comprises an anode, a cathode, and one or more organic layers disposed between the anode and the cathode, wherein at least one of the organic layers is a layer formed from the composition for organic electroluminescent element according to claim 5 .
7. The organic electroluminescent element according to claim 6 , wherein the layer formed from the composition for organic electroluminescent element is a luminescent layer.
8. A display device which comprises the organic electroluminescent element according to claim 6 .
9. A lighting device which comprises the organic electroluminescent element according to claim 6 .