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Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2018

Site-selective measurement of coupled spin pairs in an organic semiconductor

L.R. Weiss
  • Fonction : Auteur
Jan Behrends
  • Fonction : Auteur
  • PersonId : 879357
A. Rao
  • Fonction : Auteur

Résumé

Pairs of spins in molecular materials have attracted significant interest as intermediates in photovoltaic devices and light-emitting diodes. However, isolating the local spin and electronic environments of such intermediates has proved challenging due to the complex structures in which they reside. Here we show how exchange coupling can be used to select and characterize multiple coexisting pairs, enabling joint measurement of their exchange interactions and optical profiles. We apply this to spin-1 pairs formed by photon absorption whose coupling gives rise to total-spin S=0,1 and 2-pair configurations with drastically different properties. This presents a way of identifying the molecular conformations involved in spin-pair processes and generating design rules for more effective use of interacting spins.

Dates et versions

hal-01939783 , version 1 (29-11-2018)

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Paternité - Pas d'utilisation commerciale

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Citer

S. Bayliss, L.R. Weiss, Anatolie Mitioglu, Krzysztof Galkowski, Zhuo Yang, et al.. Site-selective measurement of coupled spin pairs in an organic semiconductor. Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (20), pp.5077-5082. ⟨10.1073/pnas.1718868115⟩. ⟨hal-01939783⟩
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