Universal Display Corporation
Organic electroluminescent materials and devices

Abstract:

A compound comprising a ligand L.sub.A coordinated to a metal M ##STR00001## wherein ring A, ring T, and ring W are independently selected from a 5-membered or 6-membered heterocyclic or carbocyclic ring, and the ring W is fused to the ring T. The metal compounds having a ligand L.sub.A can be found in an OLED that includes an organic layer positioned between an anode and a cathode where the organic layer comprises a metal compound above having a ligand L.sub.A disclosed herein. We also describe a consumer product comprising the OLED.