Patent ID: 11889708
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 second compound is selected from the group consisting of:, wherein:
K1′ is O or S;
K2′, K3′, and K4′ are N or CR9;
K5′ is selected from the group consisting of O, S and NR10; and
R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, boryl, 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.