申请人:Tanaka Kikinzoku Kogyo K.K.
公开号:US09859511B2
公开(公告)日:2018-01-02
The present invention provides an organometallic complex having a high quantum efficiency even in a polymer thin film as a emitting material for organic electroluminescent (EL) element. The present invention relates to an organoiridium complex for an organic electroluminescent element represented by the following Formula; wherein a C—N ligand including two atomic groups (A1, A2), and a β-diketone ligand in line symmetry having two tert-butyl-substituted phenyl groups are coordinated with an iridium atom. The organoiridium complex of the present invention has a high quantum efficiency even in a polymer thin film with respect to green to yellow electroluminescence.
(In the aforementioned Formula, R1, R2, and R3 are each a tert-butyl group or a hydrogen atom, and have at least one tert-butyl group; they may bond each other to thereby form a saturated hydrocarbon ring, when having two tert-butyl groups; A1, A2 are each an unsaturated hydrocarbon ring, at least one is a single ring, and at least one is a heterocyclic ring).
本发明提供了一种有机金属配合物,即使在聚合物薄膜中也具有较高的量子效率,作为有机电致发光(EL)元件的发光材料。本发明涉及一种有机电致发光元件的有机铱配合物,其由以下式表示;其中包括两个原子基团(A1,A2)的C—N配体,以及具有两个叔丁基取代苯基的β-二酮配体在对称线上与铱原子配位。本发明的有机铱配合物在绿色至黄色电致发光方面,即使在聚合物薄膜中也具有较高的量子效率。(在上述式中,R1、R2和R3分别是叔丁基基团或氢原子,并且至少有一个叔丁基基团;当具有两个叔丁基基团时,它们可以相互键合以形成饱和碳氢环;A1、A2分别是不饱和碳氢环,至少有一个是单环,至少有一个是杂环)。