Role of diffusing molecular hydrogen on relaxation processes in Ge-doped glass

Fabrizio Messina, Marco Cannas, Boukenter, Ouerdane, Kader Médjahdi

Risultato della ricerca: Article

3 Citazioni (Scopus)

Abstract

Temperature dependencies of steady-state and time-resolved photoluminescence (PL) from triplet state at 3.1 eV and singlet state at 4.2 eV ascribed to the twofold-coordinated Ge have been measured in unloaded and H2-loaded Ge-doped silica samples under 5.0 eV excitation in the 10–310 K range. Experimental evidences indicate that diffusing molecular hydrogen (H2) depopulates by a collisional mechanism the triplet state, decreasing both its lifetime of about 14% and the associated triplet PL intensity, whereas those of the singlet are insensitive to the presence of H2.
Lingua originaleEnglish
pagine (da-a)447-450
Numero di pagine4
RivistaJournal of Non-Crystalline Solids
Volume353
Stato di pubblicazionePublished - 2007

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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