abstract |
Ancillary ligands for organometallic complexesA compound having an ancillary ligand L<sup>1</sup> having the formula:Formula I is disclosed. The ligand L<sup>1</sup> is coordinated to a metal M having an atomic number greater than 40, and two adjacent substituents are optionally joined to form into a ring. Such compound is suitable for use as emitters in organic light emitting devices. |