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Wyszukujesz frazę "Matlak, K." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Magnetic Properties of $Fe_3O_4$ Films on Fe(001)
    Autorzy:
    Zając, M.
    Aernout, D.
    Freindl, K.
    Matlak, K.
    Spiridis, N.
    Ślęzak, M.
    Ślęzak, T.
    Korecki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1814041.pdf
    Data publikacji:
    2007-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.+a
    76.80.+y
    Opis:
    We investigated the magnetic properties of ultrathin magnetite films deposited directly on MgO(001) and on a Fe(001) buffer layer. In both cases the magnetite surface structure could be identified using low energy electron diffraction. The conversion electron MÖssbauer spectroscopy measurements proved that, for magnetite films deposited on the Fe buffer, superparamagnetic relaxation was strongly suppressed. The effect of a Fe overlayer on the magnetite film grown directly on MgO is considerably weaker. Longitudinal Kerr magnetometry indicated the presence of the ferromagnetic interfacial coupling between Fe and magnetite films. We conclude that the density of antiphase boundaries for films grown on the Fe buffer is lower than that of $Fe_3O_4$/MgO films.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 6; 1318-1325
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Black Silicon Obtained in Two-Step Short Wet Etching as a Texture for Silicon Solar Cells - Surface Microstructure and Optical Properties Studies
    Autorzy:
    Kulesza-Matlak, G.
    Gawlińska, K.
    Starowicz, Z.
    Sypień, A.
    Drabczyk, K.
    Drabczyk, B.
    Lipiński, M.
    Zięba, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/352242.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    black silicon
    low temperature texturization
    silicon nanowire
    solar cells
    multicrystalline silicon
    Opis:
    In this study a two-step short wet etching was implemented for the black silicon formation. The proposed structure consists of two steps. The first step: wet acidic etched pits-like morphology with a quite new solution of lowering the texturization temperature and second step: wires structure obtained by a metal assisted etching (MAE). The temperature of the process was chosen due to surface development control and surface defects limitation during texturing process. This allowed to maintain better minority carrier lifetime compared to etching in ambient temperature. On the top of the acidic texture the wires were formed with optimized height of 350 nm. The effective reflectance of presented black silicon structure in the wavelength range of 300-1100 nm was equal to 3.65%.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 1009-1017
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studying of Perovskite Nanoparticles in PMMA Matrix Used as Light Converter for Silicon Solar Cell
    Autorzy:
    Lipiński, M.
    Socha, R. P.
    Kędra, A.
    Gawlińska, K.
    Kulesza-Matlak, G.
    Major, Ł.
    Drabczyk, K.
    Łaba, K.
    Starowicz, Z.
    Gwóźdź, K.
    Góral, A.
    Popko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/356850.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    perovskite nanoparticles
    light converters
    solar cells
    solar energy materials
    Opis:
    The nanoparticles of CH3NH3PbBr3 hybrid perovskites were synthesized. These perovskite nanoparticles we embedded in polymethyl methacrylate (PMMA) in order to obtain the composite, which we used as light converter for silicon solar cells. It was shown that the composite emit the light with the intensity maximum at about 527 nm when exited by a short wavelength (300÷450 nm) of light. The silicon solar cells were used to examine the effect of down-conversion (DC) process by perovskite nanoparticles embedded in PMMA. For experiments, two groups of monocrystalline silicon solar cells were used. The first one included the solar cells without surface texturization and antireflection coating. The second one included the commercial cells with surface texturization and antireflection coating. In every series of the cells one part of the cells were covered by composite (CH3NH3PbBr3 in PMMA) layer and second part of cells by pure PMMA for comparison. It was shown that External Quantum Efficiency EQE of the photovoltaic cells covered by composite (CH3NH3PbBr3 in PMMA) layer was improved in both group of the cells but unfortunately the Internal Quantum Efficiency was reduced. This reduction was caused by high absorption of the short wavelength light and reabsorption of the luminescence light. Therefore, the CH3NH3PbBr3 perovskite nanoparticles embedded in PMMA matrix were unable to increase silicon solar cell efficiency in the tested systems.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1733-1739
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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