US 11,864,458 B2
Organic electroluminescent materials and devices
Joseph A. Macor, Morrisville, PA (US); and Geza Szigethy, Newtown, PA (US)
Assigned to UNIVERSAL DISPLAY CORPORATION, Ewing, NJ (US)
Filed by Universal Display Corporation, Ewing, NJ (US)
Filed on Sep. 24, 2020, as Appl. No. 17/030,873.
Claims priority of provisional application 62/912,217, filed on Oct. 8, 2019.
Prior Publication US 2021/0104690 A1, Apr. 8, 2021
Int. Cl. H10K 85/30 (2023.01); C09K 11/02 (2006.01); C09K 11/06 (2006.01); C07F 15/00 (2006.01); H10K 50/11 (2023.01); H10K 101/10 (2023.01)
CPC H10K 85/342 (2023.02) [C07F 15/0033 (2013.01); C09K 11/02 (2013.01); C09K 11/06 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/185 (2013.01); H10K 50/11 (2023.02); H10K 2101/10 (2023.02)] 20 Claims
 
1. A compound comprising a first ligand LA of Formula I

OG Complex Work Unit Chemistry
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.