Patent ID: 11957050
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 10:
11. 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, the at least one ligand selected from the group consisting of;, wherein
X1 to X13 are independently selected from carbon or nitrogen;
X 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″;
each Ra, Rb, Rc, and Rd may represent from mono substitution to the possible maximum number of substitution, or no substitution;
R′, R″, and each Ra, Rb, Rc, and Rd are independently selected from the group consisting of hydrogen, deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, and combinations thereof; or optionally, any two adjacent substitutents of Ra, Rb, Rc, and Rd join to form a ring or connect to form a multidentate ligand.