Patent ID: 11917900
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 18:
19. The OLED of claim 18, wherein the phosphorescent emitter is a transition metal complex having
at least one ligand or part of the ligand if the ligand is more than bidentate selected from the group consisting of:, , wherein:
T is B, Al, Ga, In;
each of Y1 to Y13 is independently selected from the group consisting of carbon and nitrogen;
Y′ is selected from the group consisting of BRe, NRe, PRe, O, S, Se, C═O, S═O, SO2, CReRf, SiReRf, and GeReRf;
Re and Rf can be fused or joined to form a ring;
each Ra, Rb, Rc, and Rd independently represents zero, mono, or up to a maximum allowed number of substitutions;
each of Ra1, Rb1, Rc1, Rd1, Ra, Rb, Rc, Rd, Re and Rf is independently a hydrogen or a substituent selected from the group consisting of deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; the general substituents defined herein; and
any two adjacent Ra1, Rb1, Rc1, Rd1, Ra, Rb, Rc, Rd, Re and Rf can be fused or joined to form a ring or form a multidentate ligand.