Project title: Mechanistic models for phosphorescent organic crystals
Summary: Emissive materials have applications in organic light emitting diodes (OLEDs), solid state lasers and biosensors. Current technology mainly uses fluorescence as opposed to phosphorescence which hinders their quantum efficiency, as three times the number of excitons are formed in the triplet state over the singlet state.
Traditionally, spin-forbidden phosphorescence is accessed by the addition of heavy metals, which are generally toxic and expensive. Purely organic phosphorescent systems that avoid these drawbacks do exist, and will be explored by correlating their crystal structures and other features to their photochemical response.
New computational methods will be developed to accurately describe this response and a mechanism for how these systems work will be proposed. This will then be tested with time-resolved spectroscopy.