原始名称记载: Universal Display Corporation

Provided are multi-NBN host compounds. The compound has the structure of Formula I: Also provided are formulations comprising these multi-NBN host compounds. Further provided are OLEDs and related consumer products that utilize these multi-NBN host compounds.

A compound that includes a ligand Lof Formula I, the ligand Lcoordinated to a metal M wherein Xto Xare each independently selected from CRor N; A R, R, and Rindependently represent mono to the maximum possible substitution, or no substitution;A BC wherein at least one of R, R, or Ris selected from the group consisting ofA B C wherein X, X, X, and Xare independently selected from CRor N, and two of X, X, X, or Xare N; D with the proviso that Rand R, and Rand R, do not join to form a fused benzene ring; and wherein the metal M is selected from the group consisting of Ir, Rh, Re, Ru, Os, Pt, Au, Ag, and Cu, and ligand Lis optionally linked to another ligand to form a tridentate, tetradentate, pentadentate, or hexadentate ligand. A compound of Formula VI. The invention is also directed to an OLED that includes an organic layer that comprises a compound of Formula I or Formula VI, and a consumer product that includes the described OLED. A

A compound is provided that have a Formula Ir(L)(L)(L), where x and y are each independently 1 or 2, z is 0 or 1, and x+y+z=3; the first ligand Lincludes a structure of Formula I, Lincludes a structure of Formula II, and Lis a bidentate ligand. In these structures, each of moiety A, C, and D is a monocyclic ring or a polycyclic fused ring system; each of X-Xand Z-Zis C or N; Yis a linking group; Z is Si or Ge; and each substituent is hydrogen or a General Substituent defined herein. Formulations, OLEDs, and consumer products containing the compound are also provided. Further provided is a method of preparing a compound of formula M′(L)(L)(L)as defined herein.