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

Claim 14:
15. 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 a formula M(LA)x(LB)y(LC)z:
wherein the ligand LA is, wherein the ligand LB is, wherein the ligand LC is, wherein M is a metal having an atomic weight greater than 40;
wherein x is 1, 2, or 3;
wherein y is 0, 1, or 2;
wherein z is 0, 1, or 2;
wherein x+y+z is the oxidation state of the metal M;
wherein X is carbon or nitrogen;
wherein rings C and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring;
wherein RA, RB, RC, and RD each independently represent mono, di, tri, or tetra-substitution, or no substitution;
wherein each of RA, RB, RC, RD, RX, RY, and RZ are 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 R1 and R2 are each independently selected from the group consisting of alkyl, cycloalkyl, silyl, partially or fully deuterated variants thereof, partially fluorinated variants thereof, and combinations thereof; provided that when R1 and R2 are each a non-fluorinated alkyl, they are fused into a cycloalkyl; or
R1 and R2 are fully fluorinated alkyl, cycloalkyl, or silyl or a combination thereof and are together fused into a ring;
wherein any adjacent sub stituents are optionally joined or fused into a ring.