摘要:
A compound having a first ligand L
A
of Formula I,
is disclosed. In the structure of Formula I, Z
1
through Z
7
are each independently C or N; ring B is a 5-membered or 6-membered ring; each R
A
, R
B
, and R
C
is independently hydrogen or one of a variety of substituents; any two substituents in R
C
may be joined or fused together to form a ring. In the compound, L
A
is complexed to a metal M, which is optionally coordinated to other ligands. In addition, ligand L
A
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.