Identifying triplet pathways in dilute pentacene films

• DOI: 10.1038/s41467-018-06330-x
• Publication Date: 2018-10-05T14:39:01Z
• Authors: Daphné Lubert-Per...; Enrico Salvadori; Matthew Dyson; Paul N. Stavrinou; Riccardo Montis; Hiroki Nagashima; Yasuhiro Kobori; Sandrine Heutz; Christopher W. M....
• Keywords: Pentacene; Singlet fission; Acene

Building efficient triplet-harvesting layers for photovoltaic applications requires a deep understanding of the microscopic properties components involved and their dynamics. Singlet fission is particularly appealing mechanism as it generates two excitons from single photon. However, pathways coupled triplets into free species, dependence on intermolecular geometry, has not been fully explored. In this work, we produce highly ordered dilute pentacene films with distinct parallel herringbone dimers aggregates. Using electron paramagnetic resonance spectroscopy, provide compelling evidence formation quintet in ambient conditions, intrinsically distinctive electronic kinetic properties. We find that ability quintets to separate promoted provides molecular design rules control triplets, favouring either enhanced efficiency (parallel) or strongly bound pairs could be exploited logic (herringbone).