Cyclometalated transition metal complex and organic light emitting device using the same

Abstract

Provided is a cyclometalated transition metal complex represented by Formula 1:

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. 1A through 1C are sectional views of organic light emitting devices according to embodiments of the present invention;

FIG. 2 is a graph showing results of a ¹H NMR test of Complex 2 according to an embodiment of the present invention;

FIG. 3 is a graph showing results of UV and PL tests of Complexes 2 and 3 according to embodiments of the present invention;

FIG. 4 is a graph showing results of UV and PL tests of Complex 4 according to an embodiment of the present invention;

FIG. 5 is a graph showing results of UV and PL tests of Complex 5 according to an embodiment of the present invention; and

FIG. 6 is a graph showing results of UV and PL tests of Complex 6 according to an embodiment of the present invention.

Claims

1. A cyclometalated transition metal complex represented by Formula 1:

2. The cyclometalated transition metal complex of claim 1, wherein the first mono anionic bidentate chelating ligand is selected from the group consisting of ligands represented by formulae below:

3. The cyclometalated transition metal complex of claim 1, wherein the second mono anionic bidentate chelating ligand is selected from the group consisting of ligands represented by formulae below:

4. The cyclometalated transition metal complex of claim 1, wherein the second mono anionic bidentate chelating ligand is selected from the group consisting of ligands represented by formulae below:

5. The cyclometalated transition metal complex of claim 1, wherein M is Ru, Rh, Os, Ir, Pt, or Au.

6. The cyclometalated transition metal complex of claim 1, wherein M is Ir.

7. The cyclometalated transition metal complex of claim 1 represented by Formula 1 is a complex represented by one of Formulae 2 through 9:

8. An organic light emitting device comprising an organic layer interposed between a pair of electrodes, the organic layer comprising the cyclometalated transition metal complex of claim 1.

9. The organic light emitting device of claim 8, wherein the organic layer further comprises at least one material selected from the group consisting of at least one kind of polymer host, a mixture of a polymer host and a low molecular weight host, a low molecular weight host, and a non-luminous polymer matrix.

10. The organic light emitting device of claim 8, wherein the organic layer further comprises a green light emitting material or a blue light emitting material.

11. An organic light emitting device, comprising: a pair of electrodes; andan organic layer interposed between the pair of electrodes, the organic layer comprising an emission layer comprising a red light emitting material comprised of a cyclometalated transition metal complex represented by Formula 1:

12. The organic light emitting device of claim 11, wherein the content of the cyclometalated transition metal complex is in the range of 1 to 30 parts by weight based on 100 parts by weight of the total weight of material of the emission layer.

13. The organic light emitting device of claim 11, wherein the cyclometalated transition metal complex of claim 1 represented by Formula 1 is represented by one of Formulae 2 through 9:

14. The organic light emitting device of claim 11, wherein the emission layer further comprises at least one material selected from the group consisting of at least one kind of polymer host, a mixture of a polymer host and a low molecular weight host, a low molecular weight host, and a non-luminous polymer matrix.

15. The organic light emitting device of claim 11, wherein the emission layer further comprises at least one of a green light emitting material or a blue light emitting material.

16. An organic light emitting device, comprising: a first electrode;a second electrode; andan organic layer interposed between the first electrode and the second electrode, the organic layer comprising an emission layer comprising a red light emitting material comprised of a cyclometalated transition metal complex represented by Formula 1:

17. The organic light emitting device of claim 16, wherein the emission layer further comprises at least one material selected from the group consisting of at least one kind of polymer host, a mixture of a polymer host and a low molecular weight host, a low molecular weight host, and a non-luminous polymer matrix.

18. The organic light emitting device of claim 16, wherein the emission layer further comprises at least one of a green light emitting material and a blue light emitting material.

19. The organic light emitting device of claim 16, wherein the organic layer further comprises an electron injection layer interposed between the second electrode and the emission layer, a hole blocking layer interposed between the electron injection layer and the emission layer, and a hole injection layer interposed between the emission layer and the first electrode.

20. The organic light emitting device of claim 16, wherein the content of the cyclometalated transition metal complex is in the range of 1 to 30 parts by weight based on 100 parts by weight of the total weight of the emission layer.