HETEROLEPTIC IRIDIUM COMPLEXES AS DOPANTS

摘要

Novel phosphorescent heteroleptic iridium complexes with phenylpyridine and dibenzo-containing ligands are provided. Alkyl substitution at specific positions on the ligands gives rise to compounds with improved OLED properties, including saturated green emission.

主权项

1. A compound having the formula: wherein R1 and R2 are optionally linked; wherein the sum of the number of carbon atoms in R1 and R2 is at least 2; wherein R3, R4, R5, R6 are optionally linked; wherein Ra and Rb represent mono-, di-, tri- or tetra-substitution; wherein X is selected from the group consisting of BR, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, SiRR′, and GeRR′;wherein Ra, Rb, R, R′, R1, R2, R3, R4, R5, and R6 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 n is 1 or 2.