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- W2006176154 abstract "Visible photoluminescence (PL) and Raman spectra of Ge clusters embedded in porous silicon (PS) have been studied. The as-prepared sample shows redshifted and enhanced room temperature PL relative to reference PS. This result can be explained by the quantum confinement effect on excitons in Ge clusters and tunnel of excitons from Si units of the PS skeleton to Ge clusters. One year storage in dry air results in a pronounced decrease in PL intensity but blue-shifted in contrast to reference PS. This phenomenon correlates to the size decrease of macerated Ge clusters and occurrence of “quantum depletion” in Ge clusters. Consequently, only excitons in Si units contribute to PL." @default.
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- W2006176154 title "Photoluminescence from Ge clusters embedded in porous silicon" @default.
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