| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel iridium complex capable of emitting short-wavelength phosphorescence (phosphorescence with a wavelength shorter than that of green light).SOLUTION: A tris-type iridium complex in which a ligand having a distinctive nitrogen-containing five-membered heterocyclic skeleton is coordinated is provided. The ligand has a nitrogen-containing five-membered heterocyclic skeleton composed of 2 to 4 nitrogen atoms and one or more carbon atoms. In the skeleton, an aryl group is bonded to a carbon atom on both sides of which nitrogen atoms are positioned, and a tricycloalkyl group having a bridge structure and having 9 or 10 carbon atoms is bonded to one of the two nitrogen atoms positioned on both the sides of the carbon atom. In the ligand, the other one of the two nitrogen atoms positioned on both the sides of the carbon atom having the aryl group bonded thereto is coordinated to iridium, and one carbon atom of the aryl group is bonded to iridium, to form a complex. The iridium complex is a tris-type complex in which the three ligands are coordinated to iridium. |
