Luminescence properties of nonbridging oxygen hole centers at the silica surface

Marco Cannas, Lavinia Vaccaro, Vaccaro, Viktor Radzig

Risultato della ricerca: Articlepeer review

24 Citazioni (Scopus)

Abstract

Two variants of the surface-nonbridging oxygen hole center, („Si–O)3Si–O and („Si–O)2(H–O)Si–O,stabilized in porous films of silica nano-particles were investigated by time resolved luminescenceexcited in the visible and UV spectral range by a tunable laser system. Both defects emit a photoluminescencearound 2.0 eV with an excitation spectrum evidencing two maxima at 2.0 and 4.8 eV, this emissiondecreases by a factor 2 on increasing the temperature from 8 up to 290 K. However, the different localstructure influences the emission lineshape, the quantum yield and the decay
Lingua originaleEnglish
pagine (da-a)1020-1023
Numero di pagine4
RivistaJOURNAL OF PHYSICS. CONDENSED MATTER
Volume355
Stato di pubblicazionePublished - 2009

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.2500.2503???
  • ???subjectarea.asjc.3100.3104???
  • ???subjectarea.asjc.2500.2505???

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