US 11,739,081 B2
Organic electroluminescent materials and devices
Zhiqiang Ji, Chalfont, PA (US); and Pierre-Luc T. Boudreault, Pennington, NJ (US)
Assigned to UNIVERSAL DISPLAY CORPORATION, Ewing, NJ (US)
Filed by Universal Display Corporation, Ewing, NJ (US)
Filed on Feb. 25, 2020, as Appl. No. 16/800,520.
Claims priority of provisional application 62/816,590, filed on Mar. 11, 2019.
Prior Publication US 2020/0291006 A1, Sep. 17, 2020
Int. Cl. H10K 85/40 (2023.01); C07D 409/14 (2006.01); C07D 405/14 (2006.01); C07D 403/04 (2006.01); C07D 333/76 (2006.01); C07F 7/08 (2006.01); C07D 251/24 (2006.01); C07C 15/38 (2006.01); C07C 15/30 (2006.01); C07D 403/14 (2006.01); H10K 85/60 (2023.01)
CPC C07D 409/14 (2013.01) [C07C 15/30 (2013.01); C07C 15/38 (2013.01); C07D 251/24 (2013.01); C07D 333/76 (2013.01); C07D 403/04 (2013.01); C07D 403/14 (2013.01); C07D 405/14 (2013.01); C07F 7/0812 (2013.01); H10K 85/40 (2023.02); H10K 85/622 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A compound comprising a first ligand LA of Formula I

OG Complex Work Unit Chemistry
wherein,
T is a fused ring system that comprises a structure of Formula II

OG Complex Work Unit Chemistry
ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
Z is C or N;
RB represents mono to the maximum number of allowable substitutions, or no substitution;
X1 to X6 are each C or N;
each R, RA, and RB is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, boryl, and combinations thereof;
when ring A bonds to X3 or X4, at least one of the following is true:
at least one of X1-X6 is N;
Z is C;
R is a hydrogen or a substituent selected from the group consisting of deuterium, halogen, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, boryl, and combinations thereof;
LA is complexed to a metal M to form a 5-membered chelate ring;
M can be coordinated to other ligands; and
the ligand LA can be linked with other ligands to comprise a tridentate, tetradentate, pentadentate,
or hexadentate ligand; and
any two substituents can be joined or fused together to form a ring.