Blue Light Emitting Ir(III) Compounds for OLEDs - New Insights into Ancillary…

The sky-blue emitting phosphorescent compound Ir(4,6-dFppy)2(acac) (FIracac) doped into different matrices is studied under ambient conditions and at cryogenic temperatures on the basis of broadband and highresolution emission spectra. The emitting triplet state is found to be largely of metal-to-ligand charge transfer (MLCT) character. It is observed that different polycrystalline and amorpho…