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Visible photoluminescence from silicon nanopowders produced by silicon evaporation in a high-power electron beam |
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| Authors: | 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 |
| Institution: | (1) Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosibirsk, 630090, Russia;(2) Institute of Mineralogy and Petrography, Siberian Division, Russian Academy of Sciences, Universitetskii pr. 3, Novosibirsk, 630090, Russia;(3) Budker Institute of Nuclear Physics, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 11, Novosibirsk, 630090, Russia;(4) Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, ul. Institutskaya 4/1, Novosibirsk, 630090, Russia |
| 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. |
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