As a novel substance having a novel skeleton, a novel organometallic complex that can emit phosphorescence in the green to red wavelength region and has high emission efficiency and a high yield of synthesis is provided. One embodiment of the present invention is an organometallic complex in which a diketone having a five-membered or six-membered alicyclic structure composed of carbon and hydrogen is a ligand.
In the formula, L represents a bidentate aromatic ligand and has at least a bond between carbon of an aromatic ring in the aromatic ligand and Ir. X represents a five-membered or six-membered alicycle composed of carbon and hydrogen. Further, R
1
represents a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms.
作为一种具有新颖骨架的新颖物质,提供了一种可以在绿色到红色波长区发射
磷光且具有高发射效率和高合成产率的新颖有机
金属配合物。本发明的一个实施例是一种有机
金属配合物,其中一种含有由碳和氢组成的五元或六元脂环结构的二酮作为
配体。在公式中,L代表一个双齿芳香
配体,并且至少有一种键连接芳香
配体中芳香环的碳和
铱。X代表由碳和氢组成的五元或六元脂环。此外,R1代表具有1至4个碳原子的取代或未取代的烷基基团。