Luminescence of amorphous silicon nanoclusters |
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Authors: | O B Gusev J S Vainshtein Yu K Undalov O S Yeltsina I N Trapeznikova E I Terukov O M Sreseli |
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Institution: | 1.Ioffe Physical-Technical Institute,Russian Academy of Sciences,St. Petersburg,Russia |
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Abstract: | Films of amorphous silicon suboxide α-SiO
x
containing amorphous silicon nanoclusters have been grown by direct current magnetron sputtering. It has been found that
two radiation bands are observed in the photoluminescence spectra of relatively large amorphous nanoclusters (a size of ∼2
nm) unlike one photoluminescence band of silicon nanocrystals of the same size. The form of the spectra upon the change in
the nanocluster sizes agrees with that predicted in theoretical works, in which the energy spectrum of amorphous nanoclusters
has been calculated taking into account quantum confinement of delocalized, weakly localized, and strongly localized states. |
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Keywords: | |
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