US 11,950,493 B2
Organic electroluminescent materials and devices
Jui-Yi Tsai, Newtown, PA (US); Alexey Borisovich Dyatkin, Ambler, PA (US); 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 Sep. 29, 2020, as Appl. No. 17/035,782.
Claims priority of provisional application 62/915,168, filed on Oct. 15, 2019.
Prior Publication US 2021/0111354 A1, Apr. 15, 2021
Int. Cl. H10K 85/30 (2023.01); C07F 15/00 (2006.01); C09K 11/02 (2006.01); C09K 11/06 (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 2211/1007 (2013.01); C09K 2211/1029 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/185 (2013.01); H10K 50/11 (2023.02); H10K 2101/10 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A compound of Formula Ir(LA)(LB)(LC),
wherein:
LA is a ligand of

OG Complex Work Unit Chemistry
LB is a ligand of

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 and
LC is a ligand of

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wherein:
a structure of Formula IV

OG Complex Work Unit Chemistry
 is fused to LB ligand of Formula II through two adjacent C of X1-X4;
the remainder of X1-X4 are independently CR4 or N;
ring B is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
R, RA and RB each independently represents zero, mono, or up to a maximum allowed number of substitutions to its associated ring;
each of R, R1, and R2 is independently a hydrogen or a substituent selected from the group consisting of deuterium, alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, and combinations thereof;
each of Ra, Rb, Rc, R3, R4, 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, boryl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
R, R1, and R2 together comprise four or more carbon atoms;
wherein at least one R, R1, or R2 is selected from the group consisting of

OG Complex Work Unit Chemistry
any two adjacent R, R1, R2, R3, RA, or RB can be joined or fused to form a ring; and if R1 and R2 are joined together to form a ring, then R comprises four or more carbon atoms.