AHMED Saoudi
أحمد سعودي
ahmed.saoudi@univ-msila.dz
0663111339
- Departement of Chemistry
- Faculty of Sciences
- Grade PHd
About Me
Master in Organic Synthesis and Natural Substances. in University of Msila
DomainSciences de la Matière
Research Domains
Solar energy . Thin films . Environmental composite materials
LocationMsila, Msila
Msila, ALGERIA
Code RFIDE- 06-09-2016
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Master in Organic Synthesis and Natural Substances
Chemical treatment of vegetable fiber for reinforcing polymer - 10-07-2014
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Bachelor of Pharmaceutical chemistry and natural products
biological wastewater treatment - 1992-09-02 00:00:00
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AHMED Saoudi birthday
- 2025-08-12
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2025-08-12
Novel multi-spray approach for preparing Cu₂ZnSnS₄ films for efficient solar photoelectrochemical water splitting
In this paper, a novel multi-spray approach was adopted and optimized to prepare high quality Cu2ZnSnS4 films. To achieve the Cu2ZnSnS4 phase under optimized conditions using this technique, a series of samples with different Cu:Zn:Sn:S atomic ratios were prepared and investigated using various characterization methods. X-ray diffraction (XRD) analysis indicated that the crystalline quality was strongly dependent on the Cu:Zn:Sn:S atomic ratios. In all cases, a pure Cu2ZnSnS4 kesterite phase structure with (112) orientation was obtained. All prepared films exhibited low transmittance (approximately 30 %) in the visible region. Electrochemical photocurrent tests showed that the films presented a cathodic photocurrent, thus confirming the p-type conductivity of the prepared films. Films deposited using a solution with the stoichiometric composition (Cu2ZnSnS4) exhibited excellent structural, morphological and electrochemical properties, with photocurrent density reaching up to 6 mA/cm2.
Citation
AHMED Saoudi , Yazid Bouznit , , (2025-08-12), Novel multi-spray approach for preparing Cu₂ZnSnS₄ films for efficient solar photoelectrochemical water splitting, Chemical Physics, Vol:600, Issue:112894, pages:10, ELSEVIER
- 2024-12-25
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2024-12-25
Substrate Effect On Photoelectrochemicel And Semicondictrise Properties Of Lead Oxide In 0.5 M H2SO4
This work focuses on the photoelectrochemical and semicondictrise study ofthe corrosion layer formed in the dark on Lead and lead-tin alloys in a 0.5Msulfuric acid solution: Electrochemical Impedance Spectroscopy (EIS), LinearSweeping Voltage (LSV), Mott-Schottky plots and photocurrent measurements.The composition was determined respectively by XRD diffraction and SEMelectron microscopy. The findings indicate that the incorporation of tin leads toa reduction in the corrosion layer thickness while significantly enhancing itselectrical conductivity. This effect is attributed to the formation of conductive,non-photoactive tin oxides and the development of a compact interfacial thelayer separating the grid from the positive active material.
Citation
ACHOUR Dakhouche , AHMED Saoudi , Hamida Latelli , Tawfiq Dilmi, , (2024-12-25), Substrate Effect On Photoelectrochemicel And Semicondictrise Properties Of Lead Oxide In 0.5 M H2SO4, Journal of Renewable Energies, Vol:27, Issue:2, pages:14, Renewable Energy Development Centre
- 2023-12-21
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2023-12-21
Dual effect to improve the electrical properties of fcSZO/fc films grown by nitrogen pneumatic spray pyrolysis
The principal aim of this study is to reduce considerably, via Sn doping, the resistivity of ZnO thin films prepared by simple, flexible, and cost-effective nitrogen pneumatic spray pyrolysis (NPSP) method on glass substrates at a temperature of 400°C. Different Sn content was tested (Sn/Zn = 0, 1, 3, 5 wt%) in an attempt to reduce the concentration of excessive oxygen atoms and create more free electrons. The microstructural, optical, morphological, and electrical properties of the films have been studied. The x-ray diffraction analysis demonstrated that tin-doped SZO films exhibited polycrystalline nature with a preferential orientation along (002) plane with the appearance of a new orientation (101) with the increase of Sn concentration leading then to bidirectional growth. The deposited SZO films showed an average optical transmittance of about 80% in the UV–visible region (200–800 nm) with optical band gap values at around 3.27 eV. Photoluminescence emissions of SZO samples presented three main peaks: near band edge emission, violet emission, and the blue–green emission. The surface morphology of the films obtained by scanning electron microscope (SEM) exhibited the change in morphology with increasing the Sn content. A minimum electrical resistivity value of about 17·10−3 Ω·cm was obtained for 3% SZO films. SZO films prepared by the NPSP method can be used as transparent window layer and electrodes in solar cells.
Citation
AHMED Saoudi , Yazid Bouznit , fethichouikh@yahoo.fr, , (2023-12-21), Dual effect to improve the electrical properties of fcSZO/fc films grown by nitrogen pneumatic spray pyrolysis, Microscopy Research and Technique, Vol:87, Issue:2, pages:12, John Wiley & Sons, Inc.
- 2020
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2020
physics properties of synthesized transition metal (co)-doped zno thin film for photovoltaic application
In this work we prepared the thin films of zinc oxide inlaid with cobalt atoms on glass substrates using sol-gel spin coating technology in different doping concentration (0%, 2% and 3%). Structural optical and electrical properties were studied by XRD, FTIR, UV-visible and quater point respectively. Structural properties showed that the films were well crystallized and had a hexagonal wurtzite crystalline structure with crystalline constants a = b = 3.249Å and c = 5.206Å for pure zinc oxide these values change as the cobalt concentration changes and the grain size were calculated. UV-Visible measurements indicated that the cobalt atomization decreases band gap, the extinction coefficient and refractive index were calculated. Structural, optical and electrical results have shown that thin films and method of preparation can help photovoltaic applications in solar cells and can improve yield for this application.
Citation
abdelkader MOHAMMEDI , MILOUD Ibrir , Omar MEGLALI , AHMED Saoudi , ,(2020), physics properties of synthesized transition metal (co)-doped zno thin film for photovoltaic application,1st international symposium ‘Environment and Sustainable Development’,university of relizan
- 2019
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2019
Optical properties of synthesized metal transition (Fe)-doped ZnO transparent thin films prepared by sol-gel spin coating Solar cells applications
An important milestone in the development of photovoltaic thin-film solar cells is the achievement of conversion efficiences. This work describes the highest efficiency single junction thin-film cell reported to date. n-ZnO/n-CdS/p- CuInSe2 deposited on glass substrate. The current achievements are due to improved properties of ZnO were prepared In this present study, iron doped zinc oxide thin films (ZnO: Fe) were prepared by using a simple chemical sol–gel spin coating technique on the substrate of glass varying the Fe doping concentration 0%, 1%, 5% and 10% wt. Structural and optical properties were studied respectively by X-ray diffraction and UV-visible spectroscopy. Structural results shown that all elaborated thin films are hexagonal wurtzite structure with a preferred orientation along [002] direction. Note that the lattice parameter a=b, c increases while the c constant decreases with the increasing in the Fe concentration. We found that the crystalline size increases with the addition of a Fe, it is achievedby its maximum value 21 nm for 5%. The masses density and the crystals number were calculated, the obtained resultes indicate that they are inversly proportional to the grain size the UV–visible optical transmittance measurements show that films absorption is due to allowed direct transition with a band gap ranged from 3.27 to 3.16 eV.
Citation
abdelkader MOHAMMEDI , MILOUD Ibrir , Omar MEGLALI , AHMED Saoudi , Moufdi. Hadjab, ,(2019), Optical properties of synthesized metal transition (Fe)-doped ZnO transparent thin films prepared by sol-gel spin coating Solar cells applications,The 2nd Algerian-German International Conference on New Technologies and their applications (AGICNT),SETIF - Algeria
- 2019
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2019
EFFECT OF THE DEPOSITION TEMPERATURE OF CUO-CU2O SYSTEM BY CHEMICAL SPRAY
In the present work, CuO-Cu2O thin films were deposited on cleaned glass substrates with various temperature namely (200°,260°,320°,380°,440°,500°) by spray technique. To investigate the influence of the deposition temperature on the structural, optical and electrical properties of CuOCu2O thin films, the resulting films were characterized by means of X-ray diffraction, UV-visible spectrophotometer, photocurrent. X-ray diffraction analysis indicated that copper oxide (CuO) thin films prepared has polycrystalline structure and when increase the temperature of thin film over than 440° C ,the thin film turns from phase Cu2O to CuO phase. The optical studies showed that the gradual decrease in the transmittance of the layers with the increase of the deposition temperature. In conclusion, we have been able to develop a thin layers of copper oxide CuO-Cu2O system) by a simple chemical method and the properties of the considered interesting and motivating.
Citation
AHMED Saoudi , Yazid Bouznit , abdelkader MOHAMMEDI , Amroune.Ibtissam, Bendjedi.Bouchra, Dilmi.Toufiq, ,(2019), EFFECT OF THE DEPOSITION TEMPERATURE OF CUO-CU2O SYSTEM BY CHEMICAL SPRAY,4th INTERNATIONAL SYMPOSIUM ON MATERIALS AND SUSTAINABLE DEVELOPMENT (ISMSD2019),Boumerdes - Algeria