Patent ID: 11871652
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A heteroleptic iridium compound having the formula Ir(L1)n(L2)3-n:
wherein the ligand L1 is a first ligand having Formula I,, wherein the ligand L2 is a second ligand having Formula II,, wherein L1 is different from L2;
wherein R1 is a partially or fully deuterated group selected from the group consisting of alkyl and cycloalkyl;
wherein R2 represents mono, di, tri substitutions or no substitution;
wherein R3, R4, and R5 each represent mono, di, tri, tetra substitutions or no substitution;
wherein R2 and R3 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof;
wherein R4 and R5 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 at least one of R2 and R3 is at least mono-substituted with a substituent selected from the group consisting of alkyl, cycloalkyl, combinations thereof, and partially or fully deuterated variations thereof;
wherein two R4 can be joined or fused to form an aromatic ring;
wherein
the R2 para to the N—Ir bond is alkyl, cycloalkyl, a partially or fully deuterated variant thereof, or a combination thereof; and
wherein n is 1 or 2.