M. D. Efremov, V. A. Volodin, D. V. Marin, S. A. Arzhannikova, S. V. Goryainov, A. I. Korchagin, V. V. Cherepkov, A. V. Lavrukhin, S. N. Fadeev, R. A. Salimov, S. P. Bardakhanov, “Visible photoluminescence from silicon nanopowders produced by silicon evaporation in a high-power electron beam”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2004, Volume 80, Issue 8,Pages <nobr>619

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CONDENSED MATTER

Visible photoluminescence from silicon nanopowders produced by silicon evaporation in a high-power electron beam

M. D. Efremov^a, V. A. Volodin^a, D. V. Marin^a, S. A. Arzhannikova^a, S. V. Goryainov^b, A. I. Korchagin^c, V. V. Cherepkov^c, A. V. Lavrukhin^c, S. N. Fadeev^c, R. A. Salimov^c, S. P. Bardakhanov^d

^a Institute of Semiconductor Physics of SB RAS, Novosibirsk
^b Institute of Mineralogy and Petrology, Siberian Branch RAS, Novosibirsk
^c G I. Budker Institute of Nuclear Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^d Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: Silicon nanopowders produced by electron-beam-induced evaporation of a bulk silicon sample in an argon atmosphere are studied by the photoluminescence technique and Raman scattering spectroscopy. A photoluminescence peak in the visible region of the spectrum has been detected at room temperature in powders consisting of silicon nanocrystals. The strong short-wavelength shift of the photoluminescence peak can be attributed to the quantum size effect of electrons and holes in small silicon nanocrystals (about 2 nm). The size of silicon nanocrystals is determined by analyzing Raman spectra, and it is consistent with estimates obtained from photoluminescence data.

PACS: 63.22.+m, 78.40.Fy, 78.55.-m, 81.15.-z

Received: 06.09.2004