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Article Dans Une Revue Advanced Optical Materials Année : 2023

Solution-State Cooperative Luminescence Upconversion in Molecular Ytterbium Dimers

Résumé

Two homometallic ytterbium dimers are prepared and their solution-state photoluminescence and upconversion properties are investigated. Both complexes exhibit two-photon cooperative luminescence upconversion in the visible region (lambda(em) approximate to 510 nm) upon excitation into the near-infrared Yb F-2(5/2) <- F-2(7/2) absorption band at 980 nm. This miniaturization of the cooperative luminescence phenomenon down to just two Yb ions unequivocally proves the mechanistic origins of this process. Time-resolved measurements and excited-state modeling indicate the presence of a slow recombination of two singly excited ions Yb*Yb* into a virtual excited state, which ultimately gives rise to the observed emission at approximate to 510 nm.

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Origine : Publication financée par une institution
Licence : CC BY - Paternité

Dates et versions

hal-03969119 , version 1 (09-03-2023)

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Lohona K Soro, Richard C Knighton, Fernando Avecilla, Waygen Thor, Frédéric Przybilla, et al.. Solution-State Cooperative Luminescence Upconversion in Molecular Ytterbium Dimers. Advanced Optical Materials, 2023, 11 (11), pp.2202307. ⟨10.1002/adom.202202307⟩. ⟨hal-03969119⟩
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