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      Optical Properties of Silicon Nanocomposites Containing Rare Earth Metals

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          Abstract

          Silicon nanocomposites (nc-Si) with rare earth metals (REM) were synthesized by electron-beam evaporation. The structure of nanocomposites was studied by atomic-force microscopy. The size of nanocrystallites was about 10–40 nm. Also chemical composition of obtained material was examined. The distribution of rare earth elements (REE) was uniform in film thickness, but it was characterized by a presence of maximum peak at the interface film-substrate. In the work the electrical and optical properties of nanocomposites Si:REE were investigated. Silicon nanocomposites with Eu or Y were characterized by high sensitivity to visible radiation. The ratio of dark to light resistance was achieved to 2 orders of magnitude, making this material very promising to use in thin-film photosensors. After deposition of nanocomposites Si:REE on silicon substrate, the heterojunction was formed at the interface film-substrate, for which the sensitivity to visible radiation was observed too (1–2 mA/lmV). Also, the presence of photovoltaic effect in such structures was shown, so they can be the basis of cheap thin-film solar cells, using the relevant design solutions.

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          Erbium-doped silicon nanocrystals grown by r.f. sputtering method: Competition between oxygen and silicon to get erbium

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            Time-resolved photoluminescence of ytterbium-doped nanocrystalline Si thin films

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              Interrelation between microstructure and optical properties of erbium-doped nanocrystalline thin films

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                Author and article information

                Journal
                566
                120120
                Nanopages
                Akadémiai Kiadó
                1787-4033
                1788-0718
                1 September 2013
                25 September 2013
                : 8
                : 2 ( otherID: R5172T142907 )
                : 9-16
                Affiliations
                [ 1 ] National Technical University of Ukraine, “Kyiv Polytechnic Institute” Department of Microelectronics Peremogy avenue, 37 03056 Kyiv Ukraine
                [ 2 ] Institute of Applied Electronics Kyiv Ukraine
                Article
                R864770638W53611
                10.1556/Nano.2013.00005
                101c4d4b-aadb-4406-8157-68fd97ad2dba
                History

                Materials properties,Nanomaterials,Chemistry,Nanotechnology,Analytical chemistry,Thin films & surfaces
                nanocomposite,rare earth metals,photosensitivity,photovoltaic effect

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