Patent ID: 11889747
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 10:
11. The compound of claim 1, wherein the ligand LB is selected from the group consisting of:, wherein each X1 to X13 are independently selected from the group consisting of carbon and nitrogen;
wherein 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″;
wherein R′ and R″ are optionally fused or joined to form a ring;
wherein each Ra, Rb, Rc, and Rd may represent from mono substitution to the possible maximum number of substitution, or no substitution;
wherein 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; and
wherein any two adjacent substituents of Ra, Rb, Rc, and Rd are optionally fused or joined to form a ring or form a multidentate ligand.