Luminescence and energy transfer mechanisms in photo-thermo-refractive glasses co-doped with silver molecular clusters and Eu3

Silver molecular clusters were synthesized in photo-thermo-refractive glasses using the Na+–Ag+ ion exchange technique followed by heat treatment. Comprehensive study of cluster emission reveals the presence of spectrally separated fluorescence and phosphorescence with nanosecond and microsecond lif...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2020-01, Vol.22 (40), p.23342-23350
Main Authors: Marasanov, Dmitriy V, Leonid Yu Mironov, Sgibnev, Yevgeniy M, Kolesnikov, Ilya E, Nikonorov, Nikolay V
Format: Article
Language:English
Subjects:
Chemical synthesis
Doping
Emission analysis
Energy transfer
Europium
Fluorescence
Heat exchange
Heat treatment
Ion exchange
Luminescence
Molecular clusters
Phosphorescence
Quenching
Silver
Spectra
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Summary:Silver molecular clusters were synthesized in photo-thermo-refractive glasses using the Na+–Ag+ ion exchange technique followed by heat treatment. Comprehensive study of cluster emission reveals the presence of spectrally separated fluorescence and phosphorescence with nanosecond and microsecond lifetime. Co-doping of glasses with Eu3+ was shown to results in quenching of cluster luminescence caused by energy transfer. The monitoring of silver cluster luminescence quantum yield and lifetime in the presence of Eu3+ indicates the presence of two different mechanisms of energy transfer. The first one affects the decay kinetics of cluster fluorescence and manifests at long distances, while the second one leads to static quenching of cluster emission at shorter distances and becomes prominent at higher doping Eu3+ concentration.
ISSN:1463-9076
1463-9084
DOI:10.1039/d0cp02786c