ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

    公开(公告)号:US20220285631A1

    公开(公告)日:2022-09-08

    申请号:US17587306

    申请日:2022-01-28

    Abstract: A compound comprising a first ligand LA of Formula I, is disclosed. In Formula I, ring A is a 5- or 6-membered ring; K is selected from a direct bond and a linking group; two adjacent ones of X1 to X4 are CR and are fused to form a structure of Formula II, each of X1 to X12 is CR or N; X is selected from a variety of linking groups; each R, R′, R″, and RA is hydrogen or a substituent; LA is coordinated to a metal M through the dashed lines in Formula I; and wherein (1) when X is CR′R″, X5 is CR; and (2) when X is O, S, Se, or NR′, at least one of the following is true: (a) the metal M is further coordinated to at least one substituted or unsubstituted acetylacetonate ligand; (b) at least one R comprises an electron withdrawing group; (c) at least two RA is not hydrogen or deuterium; or (d) at least one R is selected from a specific group of structures.

    ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

    公开(公告)号:US20220271240A1

    公开(公告)日:2022-08-25

    申请号:US17669821

    申请日:2022-02-11

    Abstract: A compound comprising a ligand LA of Formula I, is disclosed. In Formula I, ring A is a 5- or 6-membered ring; R is formula II, and is fused to ring B to form ring C; each of X1, X2, X3, and X4 is carbon or nitrogen; X is selected from a variety of bivalent moieties; each R1 to R4, R′, and R″ is hydrogen or a substituent; at least one 6-membered ring carbon that is part of Ring A, Ring B, or a fused ring system comprising Ring A or Ring B is substituted with deuterium; and K1 is selected from a direct bond, O, and S. Formulations, OLEDs, and consumer products including the compound are also disclosed.

Patent Agency Ranking