Photoluminescence behavior of SiO2 prepared by sol-gel processing

Sachiko Okuzaki, Kojiro Okude, Tomoji Ohishi

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Two kinds of SiO2 were prepared by the usual sol-gel process (heat-treated sample) or a sol-gel process using photoirradiation (photoirradiated sample) and their photoluminescence behaviors were investigated. All heat-treated samples had photoluminescence bands, but none of the photoirradiated samples did. Intensity of emission of heat-treated sample increased as the treatment temperature increased. This photoluminescence behavior occurred reversibly with thermal treatment and photoirradiation. The network structure of SiO2 samples were evaluated by solid state NMR. The intensity of 17O solid state NMR peak increased with increased emission intensity. These results implied that heat-treated samples included some defects which showed photosensitivity, but the photoirradiated samples lacked such defects and formed a rigid network structure instead. These defects caused the observed photoluminescence.

Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume265
Issue number1
DOIs
Publication statusPublished - 2000 Mar 2
Externally publishedYes

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Sol-gels
Photoluminescence
gels
photoluminescence
Processing
Defects
Sol-gel process
Nuclear magnetic resonance
Photosensitivity
sol-gel processes
heat
defects
Heat treatment
process heat
solid state
nuclear magnetic resonance
Hot Temperature
photosensitivity
Temperature

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Photoluminescence behavior of SiO2 prepared by sol-gel processing. / Okuzaki, Sachiko; Okude, Kojiro; Ohishi, Tomoji.

In: Journal of Non-Crystalline Solids, Vol. 265, No. 1, 02.03.2000, p. 61-67.

Research output: Contribution to journalArticle

Okuzaki, Sachiko ; Okude, Kojiro ; Ohishi, Tomoji. / Photoluminescence behavior of SiO2 prepared by sol-gel processing. In: Journal of Non-Crystalline Solids. 2000 ; Vol. 265, No. 1. pp. 61-67.
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