Patent ID: 11889708
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 11:
12. The OLED of claim 8, wherein the organic layer further comprises a compound of, wherein:
M′ is Pt or Pd;
rings A′, B′, C′, and D′ each independently represents a 5-membered or 6-membered carbocyclic or heterocyclic ring;
X1′-X12′ are each independently selected from the group consisting of carbon and nitrogen;
RA′, RB′, RC′, and RD′ each independently represents mono to the maximum allowed number of substitutions, or no substitution;
each RA′, RB′, RC′, and RD′ is 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;
n′ is 0 or 1;
L1′, L2′, and L3′ are each independently selected from the group consisting of a direct bond, BRR′, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, GeRR′, and combinations thereof;
when n′ is 1, L4′ is selected from the group consisting of a direct bond, BRR′, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, GeRR′, and combinations thereof;
when n′ is 0, L4′ is not present;
each Y1′, Y2′, Y3′, and Y4′ is selected from the group consisting of a direct bond, O, and S;
wherein at least two of Y1′, Y2′, Y3′, and Y4′ is a direct bond.