Elucidation of the electron transfer mechanism in Eu2+ and Sm3+ codoped CaF2: A step towards better understanding of trapping and detrapping in luminescent materials
Elucidation of the electron transfer mechanism in Eu2+ and Sm3+ codoped CaF2: A step towards better understanding of trapping and detrapping in luminescent materials
Joos, J. J.; van der Heggen, D.; Amidani, L.; Seijo, L.; Barandiarán, Z.
Abstract
Many-electron multiconfigurational ab initio calculations are combined with x-ray spectroscopy to scrutinize a popular model for electron transfer in lanthanide-doped crystals which hypothesizes that the electrons are conveyed by the conduction band of the host. Contrary to this accepted picture, our combined theoretical-experimental effort shows that the reversible electron phototransfer from Eu2+ to Sm3+ in CaF2 is direct, from metal to metal. It is theoretically predicted and experimentally verified that visible light induces the reverse electron transfer.
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Physical Review B 104(2021), L201108
DOI: 10.1103/PhysRevB.104.L201108
Cited 18 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-31337