Background: Dendritic self-host phosphorescent Iridium materials, which
generally consist of an Iridium light-emitting core, dendrons(branches) and surface
groups, are a kind of novel and effective triplet emission materials for non-doped solutionprocessed
organic light-emitting diodes (OLEDs).
Methodology: Iridium light-emitting cores can harvest singlet and triplet excitons to obtain
a theoretical internal quantum efficiency of 100% and can be chosen to determine key
photoelectric properties, such as color of light emission. Peripheral dendrons can act as a
host of an emissive core. The shielding effect can also reduce or eliminate the interactions
between the emitting phosphors and prevent luminance quenching.
Conclusion: Surface groups can provide suitable solubility for dendrimers in organic solvents. Therefore,
phosphorescent dendrimers are applicable to highly efficient self-host solution-processed OLEDs.