Raman and luminescence study of Tb3+ doped monolithic silica xerogels (Articolo in rivista)

Type
Label
  • Raman and luminescence study of Tb3+ doped monolithic silica xerogels (Articolo in rivista) (literal)
Anno
  • 1998-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/S1386-1425(98)00130-9 (literal)
Alternative label
  • Pucker, G.a , Parolin, S.a, Moser, E.a, Montagna, M.a, Ferrari, M.b, Del Longo, L.b (1998)
    Raman and luminescence study of Tb3+ doped monolithic silica xerogels
    in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Pucker, G.a , Parolin, S.a, Moser, E.a, Montagna, M.a, Ferrari, M.b, Del Longo, L.b (literal)
Pagina inizio
  • 2133 (literal)
Pagina fine
  • 2142 (literal)
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  • 54 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 13 (literal)
Note
  • Scopu (literal)
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  • a INFM, Dipartimento di Fisica, Universitè di Trento, Via Sommarive 14, 38050 Povo, Trento, Italy; b C.N.R.-CeFSA, via Sommarive 14, 38050 Povo, Trento, Italy (literal)
Titolo
  • Raman and luminescence study of Tb3+ doped monolithic silica xerogels (literal)
Abstract
  • Monolithic silica xerogels were doped with Tb3+ concentrations ranging from 200 to 40000 ppm. Structural differences, such as the degree of densification or the different OH-contents were quantified by Raman spectroscopy. The Tb3+ luminescence properties were studied as a function of the temperature of heat-treatment, the time of heat-treatment, and the Tb3+ concentration. Samples densified at 900°C or above and with a Tb3+ content lower than 20000 ppm show emission from both the 5D3 and the 5D4 state. Emission spectra and decay curves indicate that Tb3+ ions have a strong tendency to form clusters also at a very low Tb3+ concentration. This clustering results in a very efficient quenching of the 5D3 emission due to energy transfer processes among Tb3+ ions. Moreover, the luminescence of the 5D3 state is quenched by non-radiative transitions induced by OH vibrations. © 1998 Elsevier Science B.V. All rights reserved. (literal)
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