Chapitres D'ouvrages

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/2698

Browse

Author: search.filters.author.Tala-Ighil, Razika

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Effect of Thickness on Photocatalytic Activity of TiO2 Thin Films
    (Springer link, 2015) Bensouici, F.; Bououdina, Mohamed; Iratni, A.; Tala-Ighil, Razika
  • No Thumbnail Available
    Item
    Nanomaterials in Solar Cells
    (2015) Tala-Ighil, Razika
    Reducing cost and improving conversion efficiency are the main tasks in order to make photovoltaic energy competitive and able to substitute traditional fossil energies. Nanotechnology seems to be the way by which photovoltaics can be developed, whether in inorganic or organic solar cells. Wide-bandgap nanostructured materials (nanomaterials) prepared from II–VI and III–V elements are attracting an increased attention for their potential applications in emerging energy. They can be prepared in different geometric shapes, including nanowires (NWs), nanobelts, nanosprings, nanocombs, and nanopagodas. Variations in the atom arrangements in order to minimize the electrostatic energy originated from the ionic charge on the polar surface are responsible for a wide range of nanostructures. This book chapter will focus on contribution of nanomaterials in solar cell technology advancement
  • No Thumbnail Available
    Item
    Sol Gel Synthesis and Thermal Treatment Effect on Ce3+ Doped GdBO3 Nanoclusters Obtained in Silica Glass
    (2020) Ladjouzi, Samia; Tala-Ighil, Razika; Guerbous, Lakhdar; Bensouici, F.
    Silica glass samples containing GdBO3/Ce³⁺ nanoclusters were prepared by sol gel process. The effect of thermal treatment on the structural and optical properties was investigated. From DSC and XRD analysis, it was found that the GdBO3 hexagonal vaterite phase crystallizes inside the silica glass above 700 ℃. The average crystallites size ranges between 20 to 50 nm when the temperature increases from 800 ℃ to 1000 ℃. TEM-EDS analysis evidenced the presence of GdBO3:Ce³⁺ nanoclusters inside the silica matrix. Fourier transform infrared spectroscopy (FTIR) shows the presence of silica and borate linkages with significant changes in the intensity when the temperature increases from 500 ℃ to 1000 ℃. Finally, photoluminescence measurements showed that the sample heat treated at 1000 ℃ presents the maximum photoluminescence intensity assigned to the 5d Open image in new window 4f transition of Ce³⁺ ions