ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

    公开(公告)号:US20230363252A1

    公开(公告)日:2023-11-09

    申请号:US18352064

    申请日:2023-07-13

    Abstract: A novel compound is disclosed which includes a ligand LA of Formula II,




    wherein:



    ring B is independently a 5-membered or 6-membered carbocyclic or heterocyclic ring;
    X1 to X4 are each independently selected from the group consisting of C, N, and CR;
    at least two adjacent ones of X1, X2, X3, and X4 are CR and fused into a five or six-membered aromatic ring R3 represents zero, mono, or up to a maximum allowed substitutions to its associated ring;
    each R, R1, and R3 is independently hydrogen or a General Substituent defined herein; R2 is a General Substituent defined herein; and two substituents can be joined or fused to form a ring; the ligand LA is complexed to a metal M through the two indicated dash lines of each Formula; and the ligand LA can be joined with other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand.

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