Patent ID: 11889708
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 15:
16. The OLED of any one of claim 15, 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:
each Y1 to Y13 are independently selected from the group consisting of C and N;
Y′ is selected from the group consisting of B Re, N Re, P Re, O, S, Se, C═O, S═O, SO2, CReRf, SiReRf, and GeReRf;
Re and Rf are optionally fused or joined to form a ring;
each Ra, Rb, Re, and Rd independently represent zero, mono, or up to a maximum allowed substitution to its associated ring;
each of Ra, Rb, Re, Rd, Re and Rf is independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and two adjacent substituents of Ra, Rb, Re, and Rd are optionally fused or joined to form a ring or form a multidentate ligand.