| abstract |
is disclosed. In the structure of Formula I, Z1 through Z7 are each independently C or N; ring B is a 5-membered or 6-membered ring; each RA, RB, and RC is independently hydrogen or one of a variety of substituents; any two substituents in RC may be joined or fused together to form a ring. In the compound, LA is complexed to a metal M, which is optionally coordinated to other ligands. In addition, ligand LA is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand. Organic light emitting devices, consumer products, formulations, and chemical structures containing the compounds are also disclosed. |