Binuclear Iridium Complexes for Oriented Solution-Processed OLEDs

The patent changes the molecular structure parameters of the emitter by introducing specific substituent groups (such as biphenyl, terphenyl, or other aromatic groups) that enable orientation during solution processing. This structural modification allows the emitter to achieve orientation in solution-processed OLEDs, resolving the contradiction between vacuum-processing orientation and solution-processing compatibility.

The patent employs asymmetric substituent structures attached to the emitter molecules that create directional interactions with the substrate during solution processing. These asymmetric groups (such as substituted biphenyl groups) facilitate oriented attachment to the substrate, enabling orientation in solution-processed emitters while maintaining compatibility with solution processing methods.

The patent modifies the molecular parameters of triplet emitters by introducing specific aromatic substituent groups that enable orientation during solution processing. This allows solution-processed OLEDs to achieve both ease of manufacture and oriented emission, resolving the contradiction between manufacturing simplicity and emission orientation.

The patent employs emitter molecules with self-assembling characteristics that automatically orient themselves during solution processing through intermolecular interactions. The substituent groups facilitate self-organization of the emitter molecules in a oriented manner without requiring complex external alignment mechanisms, enabling both ease of manufacture and orientation achievement.