Carbene containing metal complexes as OLEDs

• US 7,598,388 B2
• Filed: 01/10/2005
• Issued: 10/06/2009
• Est. Priority Date: 05/18/2004
• Status: Active Grant

• Current Assignee: Universal Display Corporation, University of Southern California
• Original Assignee: Universal Display Corporation, University of Southern California
• Inventors: Tsai, Jui-Yi, Thompson, Mark E., Barone, Michael S., Tamayo, Arnold
• Primary Examiner(s): NAZARIO GONZALEZ, PORFIRIO
• Application Number:
  US11/032,739
• Publication Number:
  US 20050258742A1
• Time in Patent Office: 1,730 Days
• Field of Search: 548/101, 548/103, 546/2, 313/504
• US Class Current: 548/103
• CPC Class Codes: C07F 15/0033 Iridium compounds
• CPC Class Codes: C09B 57/10 Metal complexes of organic compounds not being dyes in uncomplexed form
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/342 comprising iridium

Abstract

A process for preparing a compound having the formula L₂IrL′ is provided. The process comprises:

combining

and L′ in the presence of an organic solvent to form a mixture, wherein L is a suitable carbene ligand precursor coordinated to Ir; and L′ is a bidentate ligand or two monodentate ligands, and L is different from L′;
Also provided is a process for preparing a compound having the formula

The process comprises:

• • (a) combining L, a carbene ligand precursor, with an organic solvent;
  • (b) maintaining the mixture of step (a) at a temperature from about 175° C. to less than the boiling point of the organic solvent in (a).
    A process for preparing a compound with the formula L₃Ir is also provided. This process comprises combining

and L in the presence of alcohol and a base to form a mixture, wherein L is a bidentate ligand that may form a five-membered chelate ring.

Claims

1. A process for preparing a compound having the formula L₂IrL′

comprising;

(a) combining

2. The process of claim 1, wherein L has the structure

3. The process of claim 2, wherein L has the structure:

4. The process of claim 3, wherein L has the structure: