Patent ID: 11937494
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 17:
18. The OLED of claim 15, wherein the first organic layer further comprises a phosphorescent sensitizer, or the OLED comprises a second organic layer disposed between the anode and the cathode, wherein the second organic layer comprises a phosphorescent sensitizer;, wherein the compound is a fluorescent acceptor; and, wherein the phosphorescent sensitizer 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 each independently selected from the group consisting of carbon and nitrogen; Y′ is selected from the group consisting of BRe, NRe, PRe, O, S, Se, C═O, S═O, SO2, CReRf, SiReRf, and GeReRf; Re and Rf can be fused or joined to form a ring; each Ra, Rb, Rc, and Rd independently represent from zero, mono, or up to a maximum allowed substitution to its associated ring; each Ra, Rb, Rc, Rd, Re and Rf is independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, 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, Rc, and Rd can be fused or joined to form a ring or form a multidentate ligand.