Patent ID: 11864458
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A compound comprising a first ligand LA of Formula I, , wherein:
ring A is a 5- to 12-membered ring comprising ring atoms selected from the group consisting of C, Si, Ge, N, O, S, Se, and B;
ring B is a 6-membered ring or 7-membered ring comprising ring atoms selected from the group consisting of C, Si, Ge, N, O, S, Se, and B;
K3 is a direct bond, O, or S;
RA, RB, RC, and RD each independently represents zero, mono, or up to a maximum allowed number of substitutions to its associated ring;
each of RA, RB, RC, RD is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof, and
any two adjacent RA, RB, RC, or RD can be joined or fused together to form a ring,, wherein the ligand LA is coordinated to a metal M through the two indicated dashed lines;, wherein the metal M can be coordinated to other ligands; and, wherein the ligand LA can be linked with other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand.