Material for organic light-emitting device, and organic light-emitting device using same
The present invention provides an organic light emitting device including a dibenzothiophene-based compound and an organic material layer composed of one more layers including a first electrode, a second electrode and a light emitting layer disposed between the first electrode and the second electrode, in which one or more layers of the organic material layer include the dibenzothiophene-based compound of Formula 1 or a compound in which a heat curable or photo curable functional group is introduced into the dibenzothiophene-based compound.
1. A dibenzothiophene-based compound represented by the following Formula 1:
Wherein L 1 is an arylene group having 6 to 40 carbon atoms; or a fluorenylene group substituted with an alkyl group,
R 1 is hydrogen; an alkyl group having 1 to 20 carbon atoms; an alkoxy group having 1 to 20 carbon atoms; or an aryl group having 6 to 12 carbon atoms, which is unsubstituted or substituted with an alkyl group having 1 to 20 carbon atoms or an alkoxy group having 1 to 20 carbon atoms,
R 2 and R 3 are the same as each other, and are each a phenyl group which is substituted with one or more substituents selected from the group consisting of a thiophene group unsubstituted or substituted with a phenyl group and a benzothiophene group, an aryl group having 10 to 16 ring-membered carbon atoms, which is unsubstituted or substituted with one or more substituents selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a fluorenyl group, a carbazole group, a nitrile group, a thiophene group unsubstituted or substituted with a phenyl group, a benzothiophene group and a nitro group; a carbazole group unsubstituted or substituted with one or more substituents selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a fluorenyl group, a carbazole group, a nitrile group, a thiophene group unsubstituted or substituted with a phenyl group, a benzothiophene group and a nitro group; a thiophenyl group unsubstituted or unsubstituted with one or more substituents selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a fluorenyl group, a carbazole group, a nitrile group, a thiophene group unsubstituted or substituted with a phenyl group, a benzothiophene group and a nitro group; or a heterocyclic group including one or more of N, S and O atoms and having 5 to 12 ring-membered carbon atoms, which is unsubstituted or substituted with one or more substituents selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a fluorenyl group, a carbazole group, a nitrile group, a thiophene group unsubstituted or substituted with a phenyl group, a benzothiophene group and a nitro group,
R 4 is hydrogen; an alkyl group having 1 to 20 carbon atoms; or an alkoxy group having 1 to 20 carbon atoms, and may form an aliphatic, aromatic or hetero condensed ring with an adjacent group, and
n means the number of substituents and is an integer of 1 to 6.
2. The dibenzothiophene-based compound of claim 1 , wherein R 1 is hydrogen or a phenyl group unsubstituted or substituted with an alkyl group having 1 to 20 carbon atoms.
3. The dibenzothiophene-based compound of claim 1 , wherein R 2 and R 3 are the same as each other, and are each an aryl group having 10 to 16 ring-membered carbon atoms, which is unsubstituted or substituted with one or more substituents selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a fluorenyl group, a carbazole group, a nitrile group, a thiophene group unsubstituted or substituted with a phenyl group, a benzothiophene group and a nitro group.
4. The dibenzothiophene-based compound of claim 1 , wherein R 2 and R 3 are the same as each other, and are each a biphenyl group, which is unsubstituted or substituted with one or more substituents selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a nitrile group and a nitro group; or a phenyl group which is substituted with one or more substituents selected from the group consisting of a thiophene group unsubstituted or substituted with a phenyl group and a benzothiophene group.
5. The dibenzothiophene-based compound of claim 1 , wherein L 1 is a phenylene group, a biphenylene group or a fluorenylene group unsubstituted or substituted with an alkyl group.
6. The dibenzothiophene-based compound of claim 1 , wherein L 1 is a phenylene group, a biphenylene group or a fluorenylene group substituted with an alkyl group,
R 1 is hydrogen, or a phenyl group unsubstituted or substituted with an alkyl group having 1 to 20 carbon atoms, and
R 2 and R 3 are the same as each other, and are each a biphenyl group, a phenyl group substituted with a thiophene group unsubstituted or substituted with a phenyl group, or a phenyl group substituted with benzothiophene.
7. The dibenzothiophene-based compound of claim 1 , wherein Formula 1 is any one of Formulas 1-1 to 1-9
8. An organic light emitting device comprising an organic material layer composed of one more layers comprising a first electrode, a second electrode and a light emitting layer disposed between the first electrode and the second electrode, wherein one or more layers of the organic material layer comprise the dibenzothiophene-based compound of claim 1 .
9. The organic light emitting device of claim 8 , wherein the organic material layer comprises a hole transporting layer and the hole transporting layer comprises the dibenzothiophene-based compound.
10. The organic light emitting device of claim 8 , wherein the organic material layer comprises a two-layered hole transporting layer and at least one layer of the hole transporting layer comprises the dibenzothiophene-based compound.
11. The organic light emitting device of claim 8 , wherein the organic material layer comprises a first hole transporting layer and a second hole transporting layer,
the first hole transporting layer comprises the dibenzothiophene-based compound, and
the second hole transporting layer comprises an aromatic amine compound.
12. The organic light emitting device of claim 11 , wherein the first hole transporting layer is interposed between a light emitting layer and the second hole transporting layer.
13. The organic light emitting device of claim 11 , wherein the first hole transporting layer is in contact with the light emitting layer.
14. The organic light emitting device of claim 8 , wherein the organic material layer comprises a hole injection layer and the hole injection layer comprises the dibenzothiophene-based compound.
15. The organic light emitting device of claim 8 , wherein the organic material layer comprises a layer that simultaneously injects and transports holes and the layer comprises the dibenzothiophene-based compound.
16. The organic light emitting device of claim 8 , wherein the organic material layer comprises an electron injection and electron transporting layer and the electron injection or electron transporting layer comprises the dibenzothiophene-based compound.
17. The organic light emitting device of claim 8 , wherein the organic material layer comprises a light emitting layer and the light emitting layer comprises the dibenzothiophene-based compound.