A compound having a formula M(LA)x(LB)y(LC)z, where ligand LA is
ligand LB is
and ligand LC is
is disclosed. In formula M(LA)x(LB)y(LC)z, M is a metal having an atomic number greater than 40; x is 1 or 2; A1-A8 are carbon or nitrogen; ring B is bonded to ring A through a C—C bond; M is bonded to ring A through a M-C bond; X is O, S, Se, CRR′, or NR1; rings C and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; at least one R4 is a five-membered or six-membered heterocyclic ring which can be further substituted by RE; each R substituent is independently selected from a variety of moieties; and any adjacent R substitutents are optionally joined to form a ring. Formulations and devices, such as an OLEDs, that include the compound of formula M(LA)(LB)(LC)z are also described.
一种化合物,其式为 M(
LA)x(LB)y(LC)z,其中
配体 LA 是
配体 LB 是
配体 LC 为
已公开。在式 M(
LA)x(LB)y(LC)z 中,M 是原子序数大于 40 的
金属;x 是 1 或 2;A1-A8 是碳或氮;环 B 通过 C-C 键与环 A 结合;M 通过 M-C 键与环 A 结合;X 是 O、S、Se、CRR′ 或 NR1;环 C 和 D 各自独立地是五元或六元碳环或杂环;至少一个 R4 是可进一步被 RE 取代的五元或六元杂环;每个 R 取代基都独立地选自各种分子;任何相邻的 R 取代基可选择连接形成一个环。还描述了包括式 M(
LA)(LB)(LC)z化合物的制剂和器件,如有机发光二极管。