Structure-enabled long-lived charge separation in single crystals of an asymmetric donor–acceptor perylenediimide cyclophane
Malik L. Williams, Adam F. Coleman, Kathryn R. Peinkofer, Ryan M. Young, Michael R. Wasielewski
Abstract
> 2 μs, which is more than 400 times longer than in solution. The faster charge separation in the single crystals results from the intermolecular donor-acceptor pyrPDI-tpPDI interactions, while the greatly enhanced charge-separated state lifetime is a consequence of charge transport through the intermolecular π-stacks. These results demonstrate the utility of pre-organizing donor-acceptor structural motifs to elicit specific crystal morphologies that can lead to enhanced photogenerated charge carrier lifetimes for solar energy conversion.
Topics & Concepts
CyclophaneAcceptorCharge (physics)ChemistryMaterials scienceCrystallographyCrystal structurePhysicsCondensed matter physicsQuantum mechanicsPerovskite Materials and ApplicationsPorphyrin and Phthalocyanine ChemistryOrganic Electronics and Photovoltaics