Patent ID: 11963441
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 9:
10. The OLED of claim 9, 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
Y1 to Y13 are independently selected from the group consisting of carbon and nitrogen;
Y′ is selected from the group consisting of BR′, NR′, PR′, O, S, Se, C═O, S═O, SO2, CR′R″, SiR′R″, and GeR′R″; and R′ and R″ are optionally fused or joined to form a ring;
Ra, Rb, Rc, and Rd may represent from mono substitution to the possible maximum number of substitution, or no substitution;
each R′, R″, Ra, Rb, Rc, and Rd are each 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 acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; or optionally, any two adjacent substitutents of Ra, Rb, Rc, and Rd join to form a ring or form a multidentate ligand.