Patent ID: 11939293
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 7:
8. The OLED of claim 6, wherein the organic layer further comprises a phosphorescent emissive dopant; wherein the emissive dopant 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 is independently selected from the group consisting of carbon and nitrogen;
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 represents from mono substitution to the maximum allowable substitutions, or no substitution;
each Ra, Rb, Rc, Rd, Re and Rf is independently 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, and combinations thereof; and
any two adjacent substituents of Ra, Rb, Re, and Rd can be fused or joined to form a ring or form a multidentate ligand.