Room temperature optoelectronic devices operating with spin crossover nanoparticles

Jean-Francois Dayen (1, 2) , Nikita Konstantinov (1) , Marlène Palluel (1, 3) , Nathalie Daro (3) , Bohdan Kundys (1) , Mohamed Soliman (1) , Guillaume Chastanet (3) , Bernard Doudin (1)

1 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg
2 IUF - Institut universitaire de France
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Molecular systems can exhibit multi-stimuli switching of their properties, with spin crossover materials having unique magnetic transition triggered by temperature and light, among others. Light-induced room temperature operation is however elusive, as optical changes between metastable spin states require cryogenic temperatures. Furthermore, electrical detection is hampered by the intrinsic low conductivity properties of these materials. We show here how a graphene underlayer reveals the light-induced heating that triggers a spin transition, paving the way for using these molecules for room temperature optoelectronic applications.

Domaines: Matériaux

Jean-Francois Dayen, Nikita Konstantinov, Marlène Palluel, Nathalie Daro, Bohdan Kundys, et al.. Room temperature optoelectronic devices operating with spin crossover nanoparticles. Materials Horizons, 2021, 8 (8), pp.2310-2315. ⟨10.1039/D1MH00703C⟩. ⟨hal-03329087⟩