The present invention provides an organic EL device having a high luminous efficiency and a long life, and an iridium complex compound used for preparing the above device.
The iridium complex compound is represented by the following Formula (1):
[in Formula (1), R
1
to R
4
are each independently a specific group; at least one of R
1
to R
4
is a group having 2 or more carbon atoms; R
5
to R
8
are each independently a specific group; and at least one of R
5
to R
8
is a specific electron-withdrawing group; (with the proviso that R
1
to R
8
are not combined with each other to form rings)].
本发明提供了一种具有高发光效率和长寿命的有机EL器件,以及用于制备上述器件的
铱配合物化合物。
铱配合物化合物由以下公式(1)表示:[在公式(1)中,R1至R4各自独立地表示特定的基团;至少有一个R1至R4是具有2个或更多碳原子的基团;R5至R8各自独立地表示特定的基团;并且至少有一个R5至R8是特定的电子吸引基团;(前提是R1至R8不与彼此结合形成环)]。