1098093-40-3

Upstream product

• 1415660-34-2 2-bromo-4-butoxypyridine 
• 144025-03-6 2,4-difluorophenylboronic acid 
• 36953-40-9 2-bromo-4-hydroxylpyridine 
• 1098093-35-6 4-butoxy-2-chloropyridine 

Relevant academic research and scientific papers

Self-host blue-emitting iridium dendrimer with carbazole dendrons: Nondoped phosphorescent organic light-emitting diodes

A blue-emitting iridium dendrimer, namely B-G2, has been successfully designed and synthesized with a second-generation oligocarbazole as the dendron, which is covalently attached to the emissive tris[2-(2,4-difluorophenyl)- pyridyl]iridium(III) core through a nonconjugated link to form an efficient self-host system in one dendrimer. Unlike small molecular phosphors and other phosphorescent dendrimers, B-G2 shows a continuous enhancement in the device efficiency with increasing doping concentration. When using neat B-G2 as the emitting layer, the nondoped device is achieved without loss in efficiency, thus giving a state-of-art EQE as high as 15.3 % (31.3 cd A-1, 28.9 lm W-1) along with CIE coordinates of (0.16, 0.29). Out of the blue: The title dendrimer has been developed by covalently attaching a second-generation carbazole dendron to an emissive tris[2-(2,4-difluorophenyl)-pyridyl] iridium(III) core through a nonconjugated linker to form an efficient self-host system (see figure). Unlike small molecular phosphors and other phosphorescent dendrimers known to date, the nondoped phosphorescent organic light-emitting diodes herein are realized without a loss in efficiency. Copyright

IRIDIUM COMPLEX COMPOUNDS, ORGANIC ELECTROLUMINESCENT DEVICES AND USES THEREOF

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.