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Wyszukujesz frazę "Ozga, J." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    The Relationship between the Monomer Chain Length and the Electro-Optical Properties of Polymer Dispersed Liquid Crystals
    Autorzy:
    Liu, J.
    Ozga, K.
    Liu, X.
    Zhen, Z.
    Plucinski, K. J.
    Szota, M.
    Kityk, I. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/958219.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    liquid crystal
    electro-optical property
    polymer dispersed
    mesh size
    response time
    Opis:
    Five polymers dispersed liquid crystalline (LC) films were fabricated using photo-polymerizable monomers with different lengths of carbon chains. These LC films have shown different electro-optical (EO) properties. Through their SEM pictures, the relationship between the linear electro-optical effect and the mesh size of the polymer network was explored. With the increase of number of photo-polymerizable monomers, the mesh size of the polymer network would become larger. So the liquid crystal molecules would be easily oriented in the electric field and therefore, the threshold voltage and saturation voltage would decrease. The open state response times were also reduced and the off state response times would be extended. The DFT simulations have shown principal role of the ground state dipole moments in the observed electro-optical efficiency.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 457-460
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoinduced Operation by Absorption of the Chalcogenide Nanocrystallite Containing Solar Cells
    Autorzy:
    Elnaggar, A. M.
    Albassam, A.
    Oźga, K.
    Jędryka, J.
    Szota, M.
    Myronchuk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/357002.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    photovoltaic cell materials
    chalcogenide layers
    photoinduced absorption
    laser treatment
    nanocrystlalline treatment
    Opis:
    It is shown that for the solar cells containing chalcogenide nanocrystallites using external laser light, one can achieve some enhancement of the photovoltaic efficiency. Photoinduced treatment was carried out using two beams of splitted Er: glass laser operating at 1.54 μm. The light of the laser was incident at different angles and the angles between the beams also were varied. Also, the studies of nanocomposite effective structures have shown enhancement of effective nanocrystalline sizes during the laser treatment. Nanocrystallites of CuInS2 and CuZnSnS4 (CZTS) were used as chalcogenide materials. The optimization of the laser beam intensities and nanoparticle sizes were explored.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 1953-1956
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Transition in SrZnO Laser Pulse Deposited Alloy
    Autorzy:
    Albrithen, H. A.
    Elnaggar, M.
    Ozga, K.
    Szota, M.
    Alahmed, Z. A.
    Alanazi, A. Q.
    Alshahrani, H.
    Alfaifi, E.
    Djouadi, M. A.
    Labis, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/355190.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    oxide materials
    solid state alloys
    structural phase transition
    X-ray diffraction
    scanning electron microscopy
    Opis:
    We have discovered a structural transition for the SrZnO alloy films from a wurtzite to a rock-salt structure, leading to a reduction in the (112̲0)/(0001) surface energy ratio. The films were grown by pulsed laser deposition using different SrO ratios, x. We have revealed that growth at a higher temperature, 750°C, resulted in a sharp 0002 peak at a low SrO content (5%), whereas growth at a higher SrO content (10%) resulted in a non-crystalline film with minute crystallites with a (112̲0) orientation. Generally the crystallinity decreased as the SrO content increased. No results obtained for the crystalline films showed any orientation of significant peaks besides the peak attributed to the (0001) plane, suggesting epitaxial growth. Optical measurements showed difference in transmission widows of alloys with different SrO percentage, and this was correlated to SrO influence on growth mode as indicated by scanning electron imaging. The studied SrZnO films, with SrO/(SrO + ZnO) ≤ 0.25, were grown by pulsed laser deposition using different SrO ratios, x. The effects of temperature and oxygen pressure during growth on the films’ structural properties were investigated. XRD results indicate that the film crystallinity was improved as the temperature and O2 pressure increased up to 650°C and 0.5 Torr, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 211-216
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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