IRIDIUM COMPLEX COMPOUNDS, ORGANIC ELECTROLUMINESCENT DEVICES AND USES THEREOF

摘要

Blue-emitting phosphorescent compounds show high solubility in solvents for coating solutions in the production of organic EL devices and have excellent thermal stability. Organic EL devices having the blue-emitting phosphorescent compounds have high luminous efficiency and long life. A blue-emitting phosphorescent compound is an iridium complex compound represented by Formula (1) below: wherein R1 is a C2-30 organic group; R2 to R4 are each independently a hydrogen atom or a C1-10 alkyl group; R5 to R8 are each independently an electron-withdrawing group selected from the group consisting of halogen atoms, C1-10 fluorine-substituted alkyl groups, C1-10 fluorine-substituted alkoxy groups, cyano group, aldehyde group, C2-10 acyl groups, C2-10 alkoxycarbonyl groups, C1-10 aminocarbonyl groups, thiocyanate group and C1-10 sulfonyl groups, a C1-10 organic group optionally having a heteroatom (except the electron-withdrawing groups) or a hydrogen atom; and at least one of R5 to R8 is the electron-withdrawing group.