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SiO 2 films containing Si nanocrystals and capped with different metal layers (Al, Pd, and Pt) were annealed in a gas containing hydrogen and subsequently studied by photoluminescence (PL). All metal layers were found to greatly increase the photoluminescence from the Si nanocrystals. However, the Pt layer was found to be the most efficient giving rise to a PL increase of 32 times as compared to that of an untreated film.
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Jensen et al. (2007) studied this question.
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