Light-emitting organometallic complexes

• US 8,778,508 B2
• Filed: 03/07/2008
• Issued: 07/15/2014
• Est. Priority Date: 12/08/2006
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Kwong, Raymond, Xia, Chuanjun, Brooks, Jason, Alleyne, Bert, Ma, Bin, Fiordeliso, James, Wu, Yonggang
• Primary Examiner(s): YAMNITZKY, MARIE ROSE
• Application Number:
  US12/044,801
• Publication Number:
  US 20090108737A1
• Time in Patent Office: 2,321 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 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/622 containing four rings, e.g. pyrene
• CPC Class Codes: H10K 85/633 comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/657 Polycyclic condensed heteroaromatic hydrocarbons
• CPC Class Codes: H10K 85/6576 comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

Novel organometallic compounds are provided, which include a 2-phenylpyridine iridium (Irppy) complex having alkyl and/or aryl substituted ligands and a heteroleptic or a homoleptic nature. These materials may be advantageously used in OLEDs to tune evaporation temperature and solubility, narrow emission, and increase device efficiency.

Claims

1. A heteroleptic iridium compound having the formula:

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

3. An organic light emitting device comprising:

an anode;

a cathode; and

an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula;

4. The device of claim 3, wherein the compound is selected from the group consisting of:

5. The device of claim 3, wherein the organic emissive layer further comprises a host.

6. The device of claim 5, wherein the host is a compound containing a carbazole group, triphenylene group or dibenzothiophene group.

7. The device of claim 3, wherein the compound is:

8. The device of claim 7, wherein the emissive organic layer contains a host and an emissive dopant, and Compound 11 is the emissive dopant.

9. The device of claim 7, wherein Compound 11 is an emissive dopant and

10. The device of claim 7, wherein Compound 11 is an emissive dopant and

11. The device of claim 3, wherein the compound is:

12. The device of claim 11, wherein the emissive organic layer contains a host and an emissive dopant, and Compound 35 is the emissive dopant.

13. The device of claim 11, wherein Compound 35 is an emissive dopant and

14. The device of claim 11, wherein Compound 35 is an emissive dopant and

15. An organic light emitting device comprising:

an anode;

a cathode; and

an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula;

16. An organic light emitting device comprising:

an anode;

a cathode; and

an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula;

17. An organic light emitting device comprising:

an anode;

a cathode; and

an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula;