Patent ID: 11910708
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: nan (nan)
Classification: CPC H | IPC H

Claim 0:
1. 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 of M(LA)2(LC);
wherein ligand LA is selected from the group consisting of:, wherein A is a 5- or 6-membered aromatic ring;
wherein Y1-Y9 are each independently selected from the group consisting of C and N;
wherein Z is C or N;
wherein M is selected from the group consisting of Ir, Rh, Re, Ru, Os, Pt, Au, and Cu;
wherein RA, RB, RC, and RD represent mono to a maximum possible number of substitutions, or no substitution;
wherein 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, arylalkyl, alkoxy, aryloxy, amino, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
wherein at least one RD is fluorine;
wherein any two RA substituents can be joined or fused together to form a ring;
wherein the organic layer is an emissive layer and the compound is an emissive dopant;
wherein the organic layer further comprises a host;
wherein the host comprises at least one chemical group selected from the group consisting of naphthalene, triazine, carbazole, dibenzofuran, and dibenzothiophene; and
wherein LC has the structure, wherein Ra, Rb, and Rc are each independently a hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof.