Influence of silver on the Sm3+ luminescence in “Aerosil” silica glasses

The introduction of silver into the samarium-containing silica glasses prepared by the original solgel method leads to the formation of complex optical centers involving samarium ions and simple and/or complex silver ions. These centers are characterized by the effective sensitization of Sm 3+ lumin...

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Bibliographic Details
Published in:Physics of the solid state 2008-08, Vol.50 (8), p.1464-1472
Main Authors: Malashkevich, G. E., Semchenko, A. V., Sukhodola, A. A., Stupak, A. P., Sukhodolov, A. V., Plyushch, B. V., Sidskiĭ, V. V., Denisenko, G. A.
Format: Article
Language:English
Subjects:
Luminescence
Nanoparticles
Optical Properties
Oxygen ions
Physics
Physics and Astronomy
Reduction
Samarium
Silica glass
Silicon dioxide
Silver
Solid State Physics
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Summary:The introduction of silver into the samarium-containing silica glasses prepared by the original solgel method leads to the formation of complex optical centers involving samarium ions and simple and/or complex silver ions. These centers are characterized by the effective sensitization of Sm 3+ luminescence by Ag + , (Ag 2 ) + , and (Ag + ) 2 ions according to the exchange mechanism for, at least, Sm 3+ -Ag + centers. The formation of Sm-Ag centers is accompanied by an increase in the concentration of nonbridging oxygen ions, which prevent the reduction of silver ions by hydrogen. Silver nanoparticles formed in small amounts upon this reduction are effective quenchers of luminescence from the corresponding excited states of Sm 3+ ions.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783408080131