Iridium complexes comprising a tetradentate ligand and two monodentate ligands, devices containing the same and formulations containing the same are described. The iriium complexes can have a structure according to Formula (I)
or
Formula (II)
or
Formula (III)
where the iridium complex includes:
a tetradentate ligand coordinated to an iridium core by coordinating atoms X
I
, X
2
, X
3
and X
4
; a first monodentate ligand coordinated to the iridium core by coordinating atom Y
1
; and a second monodentate ligand coordinated to the iridium core by coordinating atom Y
2
, wherein X
1
, X
2
, X
3
and X
4
are independently selected from the group consisting of an anionic coordinating atom and a neutral coordinating atom, wherein Y
1
and Y
2
are independently selected from the group consisting of an anionic coordinating atom and a neutral coordinating atom, and A is a linker.
本文描述了包含四齿
配体和两个单齿
配体的
铱配合物,以及包含这些配合物的器件和配方。
铱配合物可以具有公式(I)、公式(II)或公式(III)的结构,其中
铱配合物包括:由配位原子XI、X2、X3和X4协同配位到
铱核心的四齿
配体;由配位原子Y1协同配位到
铱核心的第一个单齿
配体;以及由配位原子Y2协同配位到
铱核心的第二个单齿
配体,其中X1、X2、X3和X4独立地选自阴离子配位原子和中性配位原子的群组,Y1和Y2独立地选自阴离子配位原子和中性配位原子的群组,A是连接剂。