Simon Gélinas

TL;DR: It is shown that the formation of triplet excitons can be the main loss mechanism in organic photovoltaic cells, and that, even when energetically favoured, the relaxation of 3CT states to T1 states can be strongly suppressed by wavefunction delocalization, allowing for the dissociation of 3 CT states back to free charges, thereby reducing recombination and enhancing device performance.

TL;DR: Efficient resonant-energy transfer of molecular spin-triplet excitons from organic semiconductor to inorganic semiconductors is reported, enabling luminescent harvesting of triplet exciton energy in light-emitting structures.

TL;DR: It is shown that the resonant coupling of photogenerated singlet excitons to a high-energy manifold of fullerene electronic states that enables efficient charge generation, bypassing localized charge-transfer states, and suggest that fullerenes cluster size, concentration, and dimensionality control charge generation efficiency, independent of exciton delocalization.

TL;DR: Together, these results require that singlets and triplet pairs in tetracene are effectively degenerate in energy, and begin to reconcile the temperature dependence of many macroscopic observables with a fission process which does not require thermal activation.