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

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

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

All Science Journal Classification (ASJC) codes

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

Cita questo

Role of diffusing molecular hydrogen on relaxation processes in Ge-doped glass. / Cannas, Marco; Messina, Fabrizio; Ouerdane; Médjahdi, Kader; Boukenter.

In: Journal of Non-Crystalline Solids, Vol. 353, 2007, pag. 447-450.

Risultato della ricerca: Article

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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.",
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T1 - Role of diffusing molecular hydrogen on relaxation processes in Ge-doped glass

AU - Cannas, Marco

AU - Messina, Fabrizio

AU - Ouerdane, null

AU - Médjahdi, Kader

AU - Boukenter, null

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10447/10265

M3 - Article

VL - 353

SP - 447

EP - 450

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

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