ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

摘要

A compound having the structure of Formula M(LA)x(LB)y(LC)z is disclosed. In the structure: ligand LA is;;ligand LB is;;and ligand LC is;;while M is a metal having an atomic number greater than 40; x is 1 or 2; and y and z are 0, 1, or 2. In addition, X1, X2, X3, and X4 are C or N; wherein two adjacent RB form a six-membered aromatic ring E fused to ring B, where ring E is further substituted by RE, and (a) at least one RE is fused to ring E and has a structure selected from the group consisting of;;(b) at least one RA is fused to ring A and has a structure selected from the group consisting of;;or (c) both (a) and (b). Formulations and devices, such as OLEDs, that include the compound of Formula M(LA)x(LB)y(LC)z are also described.

主权项

1. 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 number greater than 40; wherein x is 1, or 2; 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 X1, X2, X3, and X4 are C or N; wherein rings A, C, and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; wherein RA, RC, and RD each independently represent mono, di, tri, or tetra-substitution, or no substitution; wherein RB represents di, tri, or tetra-substitution; wherein two adjacent RB form a six-member aromatic carbocyclic or heterocyclic ring E fused to ring B; wherein, when ring E is heterocyclic, the only heteroatom is nitrogen; and wherein ring E is further substituted by RE; wherein RE represents mono, di, tri, or tetra-substitution, or no substitution; wherein:
(a) at least one RE is fused to ring E and has a structure selected from the group consisting of  which are optionally further substituted with one or more groups independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof,
(b) at least one RA is fused to ring A and has a structure selected from the group consisting of  which are optionally further substituted with one or more groups independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof, or
(c) both (a) and (b); wherein the wave lines indicate bonds to rings E or A, respectively; wherein each of R1, R2, R3, RA, RB, RC, RD and RE 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; and wherein any adjacent substituents of RA, RB, RC, RD and RE are optionally joined to form a fused ring.