원래 이름 기록: UNIVERSAL DISPLAY CORPORATION

Provided are organometallic compounds comprising a first ligand Lof Formula I Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

A compound of Formula I, or Formula II, is provided. In Formulae I and II, M is Pt or Pd; each R, R, R, R, R, R, R, R, and Ris hydrogen or one of the General Substituents; Ris one of the General Substituents; at least one of R, R, and Ris not hydrogen; any two of R, R, R, R, R, R, R, R, and Rmay be joined or fused together to form a ring; and R, R, and Rtogether comprise at least one heterocyclic group or at least two carbocyclic groups; with the proviso that at least one of Rand Rcomprises a cyclic group when Ris one five specific moieties.

Provided are organometallic compounds comprising an at least two dentate ligand which may further be substituted, and which is coordinated to a central metal atom. Also provided are formulations comprising these organometallic compounds. Further provided are organic light emitting devices (OLEDs) as well as related consumer products that utilize these organometallic compounds.