Patent ID: 11950493
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 14:
15. An organic light emitting device (OLED) comprising:
an anode;
a cathode; and
a first organic layer disposed between the anode and the cathode,, wherein the organic layer comprises a compound of Formula Ir(LA)(LB)(LC),, wherein:
LA is a ligand of, LB is a ligand of, LC is a ligand of Formula III, , wherein:
a structure of, is fused to the ligand LB 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 the 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:, 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.