GAUDON, Manuel; ANDRON, Ines; DEMOURGUES, Alain; RODRIGUEZ, Vincent; FARGUES, Alexandre; DURAND, Etienne; CHIRON, Anthony; FRAYRET, Christine; JUBERA, Veronique

doi:10.1039/D2MA00840H

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GAUDON, Manuel
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

ANDRON, Ines
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DEMOURGUES, Alain
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Article de revue

Ce document a été publié dans

Materials Advances. 2022, vol. 3, n° 18, p. 7061-7071

Royal Society of Chemistry

Résumé en anglais

The structural and spectroscopic properties of three Ce3+-doped A3InF6 compounds (with A+= Rb+, K+, Na+) are investigated. Containing indium, they all exhibit 2Ce3+ + In3+ ↔ In+ + 2Ce4+ redox processes induced by UV irradiation between Ce3+ and In3+ cations. The photochromo-luminescent behaviour and associated kinetics, with the Ce3+ and In+ ion emission quenching through the redox equation, respectively, are investigated. Our studies highlight that different mechanisms (surface vs. bulk) need be considered to explain the decrease in the blue (Ce3+) and orange (In+) emission curves. Moreover, the comparison of Ce3+-doped Rb2KInF6, K2NaInF6 elpasolites and K3InF6 cryolite spectral distributions shows that changing the nature of the alkali cation makes colour tuning possible. The shift of the Ce3+ and In+ colour emissions between the three as-prepared compounds is mainly due to the variation in the ionic-covalent nature of the chemical bonds around the active cation sites. The final calculated optical difference between the two bistable states varies from 0.31 to 0.48 depending on the alkali subnetwork.< Réduire

Mots clés en anglais

Luminescence

Photochromism

Fluorides

Structures

Elpasolite

Cryolite

Cerium

Indium

DOI

http://dx.doi.org/10.1039/D2MA00840H

Project ANR

Fluorures inorganiques photochromes - ANR-16-CE08-0029
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026