Stable blue and unstable UV photoluminescence from carbon nanoclusters embedded in SiO sub(2) matrices

Strong and stable blue photoluminescence (PL) from annealed C clusters embedded in SiO sub(2) (deposited by r.f.-sputtering) was recorded, under excitation power on a scale of mu W cm super(-2). UV PL was also recorded from about half of the annealed samples, but this was not stable - the intensity...

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Bibliographic Details
Published inSolid state communications Vol. 99; no. 12; pp. 883 - 886
Main Authors Zhang, Qi, Bayliss, S C, Frentrup, W
Format Journal Article
LanguageEnglish
Published 01.01.1996
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Summary:Strong and stable blue photoluminescence (PL) from annealed C clusters embedded in SiO sub(2) (deposited by r.f.-sputtering) was recorded, under excitation power on a scale of mu W cm super(-2). UV PL was also recorded from about half of the annealed samples, but this was not stable - the intensity decayed with time. Carbon and oxygen K-edge XAFS (X-ray absorption fine structure) suggest that (1) the nanoclusters present are C-based materials, (2) the luminescent materials probably involve pi bonded carbon. The size distributions of the nanoclusters obtained by TEM suggest that a quantum-confined size effect can also apply to the blue PL.
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ISSN:0038-1098