Organic electroluminescent materials and devices

摘要

A phenazasiline comprising compound, and devices and formulations including the same are described. The compound includes a ligand L1 including:;
wherein E1 is N, E2 is Si, and R4 and R5 represent mono, di, tri, tetra substitutions or no substitution;

wherein R1, R2, R3, 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, and any two adjacent R1, R2, R3, R4, and R5, are optionally joined to form a ring, which may be further substituted. In Formula I, L1 is coordinated to metal M, which has an atomic weight higher than 40, provided that the metal M does not form bond with E1 and E2. L1 may be linked with other ligands.

主权项

1. A compound having a structure of Formula II: wherein metal M has an atomic weight higher than 40; wherein R5 represents mono, di, tri, tetra substitutions or no substitution; wherein R4 represents mono, di, or tri substitutions; wherein each L2 is a ligand coordinated to the metal M; wherein each L2 can be the same or different; wherein R1, R2, R3, 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 one R4 is coordinated to the metal M; wherein any two adjacent R2, R3, R4, and R5 are optionally joined to form a ring, which may be further substituted; wherein the metal M does not form a direct bond with the N or the Si of Formula II; wherein any of R1, R2, R3, and R4 are optionally linked to L2 to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand; wherein m is a value from 1 to the maximum number of ligands that may be attached to the metal M; and wherein m+n is the maximum number of ligands that may be attached to the metal M.