Organic electroluminescent materials and devices

Matériaux et dispositifs électroluminescents organiques

Organische elektrolumineszente materialien und vorrichtungen

Abstract

A compound having a carbene ligand L A of Formula I: is disclosed wherein ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring; Z is nitrogen or carbon; R 7 represents from mono-substitution to the possible maximum number of substitution, or no substitution; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 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; any adjacent substituents of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are optionally joined or fused into a ring or a double bond; the ligand L A is coordinated to a metal M through the carbene carbon and Z; and the ligand L A is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand.

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