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    Wyświetlanie 1-4 z 4
    Tytuł:
    Optical and Dispersion parameters of ZnS Thin Films Prepared by Flash Evaporation Method
    Autorzy:
    Bakr, N. A.
    Jandow, N. N.
    Habubi, N. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/412057.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ZnS thin film
    flash evaporation
    Swanepoel technique
    single oscillator model
    Opis:
    Zns thin films are obtained by flash evaporation method onto preheated glass substrates. The transmittance analysis allowed the determination of refractive index and thickness using envelope method. It was found that the refractive dispersion data obeyed the single oscillator model. The calculated value of the refractive index (n0 ) was found to be equal to 2.27, which is in a good agreement with the value obtained from Cauchy’s fitting. Also the value of the optical energy gap, extinction coefficient, real and imaginary parts of the dielectric constant and optical conductivity have been measured.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 20, 1; 52-63
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Silicon Orientation on Thickness and Chemical Bonding Configuration of SiOxNy Thin Films
    Autorzy:
    Ismael, M. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/412157.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Glass assisted CO2 laser
    Silicon substrate
    SiOxNy Thin Film
    Opis:
    Fourier Transform Infrared (FTIR) Spectroscopy and Capacitance-Voltage measurements are used to characterize the chemical bonding configuration and crystallographic orientations for SiOxNy thin films grown by glass assisted CO2 laser. FTIR spectra detected the Si-O and Si-N strongest absorption bands are close to each other at wave number in the range (700-1000 cm-1) depending on silicon substrates, and Si-O stretching bond at wave number around (~1088.285 cm-1) with a FWHM of 73.863 cm-1 for the two samples, the presences of hydrogen impurities like Si-H and N-H in the films were also identified and calculated. From C-V measurement film thickness were calculated and found to be 19.2 and 17.2 nm for SiOxNy/Si(111) and SiOxNy/Si(100) respectively. From the flat band voltage of -5.4 and -1.3 measured the two samples, their interface trap densities were found to be 1.4 × 1013 and 1.57 × 1013 ev-1•cm-2 respectively.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 14; 1-9
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Electrically Conductive Nanocrystalline Thin Film for Optoelectronic Applications
    Autorzy:
    Das, S K.
    Islam, J. M. M.
    Hasan, M.
    Kabir, H.
    Gafur, Md. A.
    Hoque, E.
    Khan, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412543.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Conductive thin film
    Composite
    TiO2
    Solar cell
    Optoelectronics
    Sodium alginate
    Opis:
    Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added in the composite films to increase electrical conductivity. Electrical properties such as conductivity, capacitance, dielectric constant, and loss tangent of the composites were investigated. The current voltage characteristics for all the composites showed ohmic behavior. All the electrical properties have been found to improve with the incorporation of sand (SiO2) but 6 % sand containing composite exhibits the best electrical properties. The mechanical properties tensile strength (TS), elongation at break (Eb) and Young modulus for 6 % sand containing composite film are found to be 4.445 MPa, 9.76 %, and 72.8 MPa respectively. The experimental results reveal that the blended films exhibit higher stability and improved mechanical properties of both tensile strength and elongation at break in dry state. Water absorption properties of the composites are found to decrease with the increase of sand content. Lowest water uptake properties and highest stability were demonstrated by 6 % sand containing sample. Electrically conductive composite films have useful applications for solar cells and optoelectronics. Thus, this study is very much expected to aid in the design and selection of proper composite for the potential application of solar cell and optoelectronics.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 10, 1; 90-101
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Gamma Irradiation on the Optical Properties of Mg doped CdO Thin films deposited by Spray Pyrolysis
    Autorzy:
    Hassouni, M.H.
    Mishjil, K.A.
    Chiad, S.S.
    Habubi, N.F.
    Powiązania:
    https://bibliotekanauki.pl/articles/412503.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    TCOs
    thin films
    optical properties
    doping film
    gamma radiation
    Opis:
    Thin films of CdO and 9 % Mg doped CdO doped have been prepared using spray pyrolysis technique. Transmission and absorption spectra were recorded in order to estimate these films. The deposited thin films were exposed to γ - rays. We have studied the transmission, absorptions and absorption coefficient as a function of photon energy before and after irradiation. The optical constants such as: reflectance, extinction coefficient, refractive index, real and imaginary parts of the dielectric constant and the electrical conductivity were calculated also.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 11; 26-37
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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