Organometallic complex and organic electroluminescence device using the same

Abstract

Provided are an organometallic complex providing highly efficient phosphorescence and an organic electroluminescence device using the same. The organometallic complex can be used to form an organic layer of the organic electroluminescence device, efficiently emits light of a wavelength corresponding to red light, and has high brightness and low operating voltage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:

FIGS. 1 a through 1f are diagrams schematically illustrating various laminated structures of an organic electroluminescent device according to embodiments of the present invention;

FIG. 2 is a diagram illustrating an organic electroluminescent device manufactured according to an embodiment of the present invention;

FIG. 3 is a graph showing the result of a thermogravimetry analysis of an organometallic complex obtained in Example 1; and

FIG. 4 is a graph showing the result of a thermogravimetric analysis of an organometallic complex obtained in Example 3.

Claims

1. An organometallic complex comprising a compound represented by Formula 1:

2. The organometallic complex of claim 1, wherein the compound is represented by Formula 2:

3. The organometallic complex of claim 1, wherein the compound is represented by Formula 3:

4. The organometallic complex of claim 3, wherein the compound represented by Formula 3 is represented by one of Formulas 5 through 9:

5. The organometallic complex of claim 1, wherein the compound is represented by Formula 4:

6. The organometallic complex of claim 4, wherein the compound represented by Formula 4 is represented by Formula 10 or 11:

7. The organometallic complex of claim 1, wherein the cyclometalating ligand (CyN-CyC) is represented by one of Formulas 12 through 40:

8. The organometallic complex of claim 1, wherein the substituted or unsubstituted C3-C60 heterocyclic group of the CyN is selected from the group consisting of pyrrolidine, morpholine, thiomorpholine, and thiazolidine, the substituted or unsubstituted C3-C60 heteroaryl group of CyN is selected from the group consisting of pyridine, 4-methoxypyridine, quinoline, pyrrole, indole, pyrazine, pyrazole, imidazole, pyrimidine, quinazoline, thiazole, oxazole, triazine, and 1,2,4-triazole; and the substituted or unsubstituted C4-C60 cyclic group of the CyC is selected from the group consisting of cyclohexane and cyclopentane, the substituted or unsubstituted C3-C60 heterocyclic group of the CyC is selected from the group consisting of tetrahydrofuran, 1,3-dioxane, 1,3-dithiane, 1,3-dithiolane, 1,4-dioxa-8-azaspiro[4,5]decane, and 1,4-dioxaspiro[4,5]decan-2-one, the substituted or unsubstituted C4-C60 aryl group of the CyC is selected from the group consisting of phenyl, 1,3-benzodioxole, biphenyl, naphthalene, anthracene, and azulene, and the substituted or unsubstituted C3-C60 heteroaryl group of the CyC is selected from the group consisting of thiophene, furan2(5H)-furanone, pyridine, coumarin, imidazole, 2-phenylpyridine, 2-benzothiazole, 2-benzooxazole, 1-phenylpyrazole, 1-naphthylpyrazole,5-(4-methoxyphenyl) pyrazole, 2,5-bisphenyl-1,3,4-oxadilzole, and 2,3-benzofuran2-(4-biphenyl)-6-phenyl benzooxazole.

9. The organometallic complex of claim 1, wherein M is one of Ir and Pt.

10. An organic electroluminescence device having an organic layer interposed between a pair of electrodes, the organic layer comprising the organometallic complex of claim 1.

11. An organometallic complex represented by Formula 1:

12. An organic electroluminescence device having an organic layer interposed between a pair of electrodes, the organic layer comprising the organometallic complex of claim 11.

13. An organic electroluminescence device, comprising: a first electrode;a second electrode; andan organic layer comprising a light emitting layer comprised of an organometallic complex represented by Formula 1:

14. The organic electroluminescence device of claim 13, wherein the organometallic complex is represented by Formula 2:

15. The organic electroluminescence device of claim 13, wherein the organometallic complex is represented by Formula 3:

16. The organic electroluminescence device of claim 13, wherein the organometallic complex is represented by Formula 4:

17. The organic electroluminescence device of claim 13, wherein the organometallic complex is represented by one of Formulae 5 through 9:

18. The organic electroluminescence device of claim 13, wherein the organometallic complex is in an amount of 1 to 30 parts by weight based on 100 parts by weight of materials used to form the light emitting layer.

19. The organic electroluminescence device of claim 13, wherein the light emitting layer further comprises at least one of green phosphorescent material and blue phosphorescent material.

20. The organic electroluminescence device of claim 13, wherein the organic layer further comprises at least one host selected from the group consisting of a polymer host, a mixture host comprising a polymer and a small molecule, a small molecule host, and a non-emitting polymer matrix.