Heteroleptic phosphorescent emitters

• US 8,367,223 B2
• Filed: 11/10/2009
• Issued: 02/05/2013
• Est. Priority Date: 11/11/2008
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Xia, Chuanjun, Kwong, Raymond, Rayabarapu, Dinesh, Ma, Bin
• Primary Examiner(s): YAMNITZKY, MARIE ROSE
• Application Number:
  US12/615,660
• Publication Number:
  US 20100141127A1
• Time in Patent Office: 1,183 Days
• Field of Search: None
• US Class Current: 428/690
• CPC Class Codes: C07F 15/0033 Iridium compounds
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: H10K 85/342 comprising iridium

Abstract

Heteroleptic compounds containing phenylpyridine and phenylbenzimidazole are provided. The compounds may be used in organic light emitting devices, particularly as emissive dopants in the emissive layer of such devices.

Claims

1. A heteroleptic iridium compound Ir(L1)_n(L2)_3-n having the formula:

2. The compound of claim 1, wherein n=1.

3. The compound of claim 1, wherein the compound has the formula:

4. The compound of claim 1, wherein each of R₂, R₃, and R₅ are hydrogen.

5. The compound of claim 1, wherein L1 is selected from the group consisting of:

6. The compound of claim 5, wherein L2 is selected from the group consisting of:

7. The compound of claim 1, wherein L2 is selected from the group consisting of:

8. The compound of claim 1, wherein L1 is selected from the group consisting of:

9. The compound of claim 8, wherein L2 is selected from the group consisting of:

10. The compound of claim 1, wherein L2 is selected from the group consisting of:

11. The compound of claim 1, wherein the compound is selected from the group consisting of:

12. The compound of claim 1, wherein the compound is selected from the group consisting of:

13. The compound of claim 1, wherein the compound has an emission spectrum with a narrower full width at half maximum than either

corresponding compound of formula

14. The compound of claim 1, wherein the compound has a lower sublimation temperature than either

corresponding compound of formula

15. The compound of claim 1, wherein the compound is capable of being a green emissive dopant.

16. An organic light emitting device comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, the organic layer comprising a heteroleptic iridium compound Ir(L1)_n(L2)_3-n having the formula;

17. The device of claim 16, wherein the organic layer is an emissive layer and the compound having the formula

18. The device of claim 16, wherein the compound is selected from the group consisting of:

19. The device of claim 16, wherein the compound is selected from the group consisting of:

20. The device of claim 16, wherein the organic layer further comprises a host.

21. The device of claim 20, wherein the host has the formula:

22. The device of claim 20, wherein the host has the formula:

23. A consumer product comprising a device, the device comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, the organic layer comprising a heteroleptic iridium compound Ir(L1)_n(L2)_3-n compound having the formula;