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Wyszukujesz frazę "SnO2:F" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Structural, Morphological and Optical Characterization of SnO2:F thin films prepared by Chemical spray Pyrolysis
Autorzy:
Yousif, S. A.
Abass, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/412231.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
SnO2
SnO2:F
X-ray diffraction
optical characterization
Opis:
Fluorine doped tin oxide (FTO) films were successfully prepared on glass and quartz substrate at a substrate temperature equal to for different fluorine doping (0, 0.05, 0.1, 0.15) by a homemade spray pyrolysis technique. The spray solution prepared from tin tetrachloride pentahydrate dissolved in distilled water at concentration and ammonium fluoride was added into the solution for fluorine doping. X-ray diffraction patterns of the spray-deposited (SnO2: F) films for different fluorine doping show that all the diffractograms contain the characteristic SnO2 orientations. The matching of the observed and standard d-values confirm that the deposited films are of tin oxide with tetragonal structure and the films are polycrystalline with (110) as a preferred growth orientation. The surface morphology of thin film has been examined by atomic force microscopy (AFM). The average transmittance in the visible region (at 550 nm) has been found (40 %, 47 %, 52 %, 59 %, 61 %) for the fluorine doping (0, 0.05, 0.1, 0.15, 0.2) respectively.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 13; 90-102
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improved Photovoltaic Properties Of Dye-Sensitized Solar Cells Using Laser Patterned F-Doped SnO2 Thin Films
Poprawa właściwości fotowoltaicznych ogniw słonecznych uczulonych barwnikiem przez laserową modyfikację powierzchni cienkich warstw SnO2
Autorzy:
An, H.-R.
An, H.
Riu, D.-H.
Ahn, H. J.
Powiązania:
https://bibliotekanauki.pl/articles/353636.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dye-sensitized solar cells
F-doped SnO2 thin films
surface morphology
laser patterning
fotowoltaniczne ogniwa słoneczne
cienkie warstwy SnO2
morfologia powierzchni
modyfikacja laserowa
Opis:
We modified the surfaces of F-doped SnO2 thin films using laser patterning to improve the photovoltaic properties of dye-sensitized solar cells. To do so, we varied the laser power density and the distance between laser-patterned lines. First, we investigated three power densities. Higher densities led to higher sheet resistances owing to increases in surface roughnesses. The lowest power density increased surface roughness without electrical degradation. Next, we explored three line spacings at a fixed power density. The films with the narrowest spacing exhibited the highest power conversion efficiency (~7.00%), the highest short-circuit photocurrent density (16.28 mA/cm2), and a good fill factor (58.82%).
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1241-1245
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of fluorine and tungsten co-doping on optical, electrical and structural properties of tin (IV) oxide thin films prepared by sol–gel spin coating method
Autorzy:
Keskenler, E F
Turgut, G
Aydin, S.
Dogan, S
Duzgun, B
Powiązania:
https://bibliotekanauki.pl/articles/175016.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
tin (IV) oxide (SnO2)
fluorine (F) and tungsten (W) co-doping
sol-gel
Opis:
Fluorine and tungsten co-doped tin (IV) oxide (WFTO) thin films have been prepared first time by a sol–gel spin coating method. The effect of F and W co-dopant ratio on optical, electrical and structural properties of SnO2 was investigated. It was found that the optical properties of the films were obviously affected by the co-dopant ratio. When the F:W co-dopant ratio increases from 0.25:0.25 to 0.75:0.50, the transmittance in the short wavelengths slightly increases and transmittance edge shifts towards shorter wavelength. With an increase in the co-dopant ratio, the reduction and red shifts in the optical transmittance edge are very obvious at all wavelengths. Transmittance values at 550 nm for the films have varied between 79.64% and 50.20%. The indirect and direct band gap values for WFTO-1, WFTO-2, WFTO-3 and WFTO-4 samples were calculated to be 3.73, 3.79, 3.48, 3.40 eV and 4.03, 4.04, 3.98, 3.97 eV, respectively. The crystal structure of the films has been investigated by X-ray diffraction patterns. It has been observed that WFTO-1 and WFTO-2 samples have (111) preferential orientation corresponding to SnO2 cubic phase. This orientation almost disappears and changes to tetragonal phase (110) orientation for WFTO-3 and WFTO-4. To the best of our knowledge, this is the first cubic structure observation for SnO2 grown by the sol–gel technique. The electrical properties were also changed with co-doping ratio. The best optical, electrical and structural properties were obtained for mole ratio 0.75:0.50 (F:W).
Źródło:
Optica Applicata; 2013, 43, 4; 663-677
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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