Exciton generation strategies

In general, excitons generated in OLEDs are classified according to its spin as singlet and triplets. Triplet excitons are usually forbidden, however by inducing a spin orbit interaction by heavy metal atom in organic lattice, we can cultivate them for higher efficiencies. Although, the incorporation of heavy metal atom in organic materials increases its cost and it is highly depends on the triplet energy level of host and subsequent transport layers. Thermally activated delayed fluorescence (TADF) and aggregated exciton (J- and H-) generation are some of the novel strategies employed in OLEDs to cultivate higher efficiency. In related to this, we are also investigating the enhanced OLED performances with certain biomaterials for inducing J and H- aggregated excitons.