Patent ID: 11903306
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C  Y | IPC C  H

Claim 17:
18. An organic light-emitting device (OLED) comprising:
an anode;
a cathode; and
an organic layer, disposed between the anode and the cathode, comprising a compound having the Formula selected from the group consisting of:, wherein rings A, B, C, and D are each a 5 or 6-membered carbocyclic or heterocyclic ring;
wherein in Formula III:
L1 and L3 each independently selected from the group consisting of a direct bond, BR, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, SiRR′, GeRR′, alkyl, and combinations thereof;
n1, n2 each independently is 0 or 1;
when n1 or n2 is 1, L2 or L4 is selected from the group consisting of a direct bond, BR, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, SiRR′, GeRR′, alkyl, and combinations thereof; and
when n1 or n2 is 0, L2 or L4 is not present;
Q1, Q2, Q3 and Q4 each independently selected from the group consisting of direct bond and oxygen;
when any of Z1, Z2, Z3 and Z4 is nitrogen, the Q1, Q2, Q3 and Q4 attached thereto is a direct bond;

ring A is trans to ring D, ring B is trans to ring C in a square-planar coordination configuration;
wherein R1, R2, R3, and R4 each represents mono to the maximum possible number of substitution, or no substitution;
wherein Z1, Z2, Z3, and Z4 are each independently selected from the group consisting of carbon and nitrogen;
wherein M2 is a metal selected from the group consisting of Pt and Pd;
wherein a fourth distance is the distance between the atom in R1 that is the farthest away from M2 to the atom in R4 that is the farthest away from M2;
wherein a fifth distance is the distance between the atom in R2 that is the farthest away from M2 to the atom in R3 that is the farthest away from M2;
wherein the fourth distance is longer than the fifth distance by at least 4.3 Å;
wherein R, R′, R1, R2, R3, and R4 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;
wherein (i) each of R1 and R4 comprises at least one cyclic moiety selected from the group consisting of aryl, heteroaryl, and cycloalkyl, or (ii) at least one of R1 and R4 comprises at least two cyclic moieties each independently selected from the group consisting of aryl, heteroaryl, and cycloalkyl; and
wherein any two substituents among R, R′, R1, R2, R3, and R4 are optionally joined or fused into a ring.