Universal Display Corporation

University of Southern California

Michael S Barone

Jui-Yi Tsai

Mark Edward Thompson

Bin Ma

Raymond Kwong

Michael Stewart Weaver

David B Knowles

Arnold Tamayo

Robert W Walters

A process for preparing a compound having the formula LIrL' is provided. The process comprises: combining and L&#x2032; in the presence of an organic solvent to form a mixture, wherein L is a suitable carbene ligand precursor coordinated to Ir; and L&#x2032; is a bidentate ligand or two monodentate ligands, and L is different from L&#x2032;; Also provided is a process for preparing a compound having the formula  The process comprises: A process for preparing a compound with the formula LIr 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.

Carbene containing metal complexes as OLEDs

A process for preparing a compound having the formula LIrL' is provided. The process comprises: combining and L&#x2032; in the presence of an organic solvent to form a mixture, wherein L is a suitable carbene ligand precursor coordinated to Ir; and L&#x2032; is a bidentate ligand or two monodentate ligands, and L is different from L&#x2032;;Also provided is a process for preparing a compound having the formula The process comprises: 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.

The present invention relates to organic light emitting devices (OLEDs), and more specifically to efficient OLEDs comprising an array of pixels and having reduced pixel shrinkage. The devices of the present invention comprise further relates to materials for use as emissive materials which give reduced shrinkage when incorporated into an OLED.

Organic light emitting devices having reduced pixel shrinkage

Emissive materials are provided having the following structures:Devices incorporating the emissive materials are also provided.

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Pittsburgh, PA, United States of America

Michael S Barone