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15 results on '"Faculté De Technologie Blida1"'

1. Optimization of CdZnyS1−y Buffer Layer Properties for a ZnO/CZTSxSe1−x/Mo Solar Cell to Enhance Conversion Efficiency

Author

Boubakeur, M., Aissat, A., Chenini, L., Arbia, M. Ben, Maaref, H., Vilcot, Jean-Pierre, Faculté De Technologie Blida1, Université Saâd Dahlab Blida 1 (UB1), Université de Monastir - University of Monastir (UM), Laboratoire de Micro-optoélectronique et Nanostructures [Monastir], Faculté des Sciences de Monastir (FSM), Université de Monastir - University of Monastir (UM)-Université de Monastir - University of Monastir (UM), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and no information

Subjects
solar cell, [SPI]Engineering Sciences [physics], New materials, thin film, Materials Chemistry, semiconductors, Electrical and Electronic Engineering, Condensed Matter Physics, optoelectronic, Electronic, Optical and Magnetic Materials
Abstract

International audience

Published
2022
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2. Simultaneous sorption of 4-nitrophenol and 2-nitrophenol on a hybrid geocomposite based on surfactant-modified pillared-clay and activated carbon

Author

Michel Baudu, Michel Harel, Omar Bouras, Faiza Zermane, Jean-Claude Bollinger, Sabiha Hamidouche, M. Houari, Benamar Cheknane, Jean Debord, Département de Chimie Industrielle, Université de Saâd Dahlab [Blida] (USDB )-Faculté des Sciences de l'Ingénieur, Université de Saâd Dahlab [Blida] (USDB )-Faculté De Technologie Blida1, Université de Saâd Dahlab [Blida] (USDB ), Pharmacologie des Immunosuppresseurs et de la Transplantation (PIST), Université de Limoges (UNILIM)-CHU Limoges-Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST FR CNRS 3503)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de Pharmacologie, toxicologie et pharmacovigilance [CHU Limoges], CHU Limoges, Institut de Mathématiques de Toulouse UMR5219 (IMT), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Groupement de Recherche Eau, Sol, Environnement (GRESE), Université de Limoges (UNILIM), Université Saâd Dahlab Blida 1 (UB1)-Faculté des Sciences de l'Ingénieur, Université Saâd Dahlab Blida 1 (UB1)-Faculté De Technologie Blida1, Université Saâd Dahlab Blida 1 (UB1), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), and Bollinger, Jean-Claude

Subjects
[SDE] Environmental Sciences, General Chemical Engineering, Activated carbon, Industrial and Manufacturing Engineering, chemistry.chemical_compound, Nitrophenol, Abraham solvation parameters model, medicine, Environmental Chemistry, Organic chemistry, Freundlich equation, Simultaneous sorption, [CHIM.MATE] Chemical Sciences/Material chemistry, Modified clay, Aqueous solution, Competition, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Solvation, 4-Nitrophenol, Sorption, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.ORGA] Chemical Sciences/Organic chemistry, Montmorillonite, chemistry, Chemical engineering, [SDE]Environmental Sciences, medicine.drug
Abstract

International audience; New generations of hydrophobic composite geomaterials intended to sorb certain hazardous wastes are assembled by mixing surfactant-modified aluminum-pillared montmorillonite (Al-SMPM) with activated carbon (AC). The sorption of 4-nitrophenol (4NP) and 2-nitrophenol (2NP) on these sorbents was studied in both single and binary component systems from aqueoussolutions using batch tests. Results showed the efficiency of these composite sorbents relative to the two phenolic compounds, with a dominant contribution from Al-SMPM. In single-component systems, sorption isotherms of 4NP and 2NP as a function of pH were analyzed with the Freundlich equation, whose statistical interpretation was also developed. Sorption capacities sharplydecreased when the solution pH value was raised from 3 to 9. In binary-component systems, the fit between measured and predicted simultaneous sorption capacities of both 4NP and 2NP indicated that the Sheindorf-Rebhun-Sheintuch model, an extended Freundlich model, is fully applicable. The 2NP favorably influences the sorption of 4NP. The synergistic effect between these two nitrophenol compounds has been confirmed by the higher competition coefficients, which increase with increasing pH. A number of hypotheses, based on the Abraham's solvation parameters model, have been advanced to discuss this mechanism.

Published
2015
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3. Intersubband Optical Properties of Strained InAsSb/AlGaAs Quantum Well Structure

Author

Chenini, L., Aissat, A., Vilcot, Jean-Pierre, Faculté De Technologie Blida1, Université Saâd Dahlab Blida 1 (UB1), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)

Subjects
Detection, [SPI]Engineering Sciences [physics], Absorption coefficient, Semiconductor III–V, Nanostructures
Abstract

International audience; AbstractIn this paper, the intersubband optical properties of strained InAsSb/AlGaAs single quantum well structure have been investigated in a detailed way as depending on the structure parameters. For this aim, first, we have computed the energy eigenvalues and their corresponding wave functions of this structure by means of the solution of the Schrodinger equation in envelope function effective mass approximation. Second, we have calculated some important parameters as strain, band gap energy, effective mass and the conduction band (CB) offset ratio. Finally, the intersubband absorption coefficient properties have been determined as a function of the composition, well thickness and the emission wavelength.

Published
2023
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4. SiGe quantum wells implementation in Si based nanowires for solar cells applications

Author

Safi, M. (M.), Aissat, A. (A.), Guesmi, H. (H.), Vilcot, J-P. (Jean-Pierre), Faculté De Technologie Blida1, Université Saâd Dahlab Blida 1 (UB1), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN], and Optoélectronique - IEMN [OPTO - IEMN]

Subjects
Nanowire, Quantum wells, Solar cells, Quantum efficiency, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Abstract

International audience; This study focuses on modelling and optimizing a new Si nanowire solar cell containing a SiGe/Si quantum well. Quantum efficiency measurements show that the proposed structure has a higher energy absorption advantage and stronger than that of a solar cell based on a standard Si p-i-n nanowire. As a result, the insertion of 14 layers of SiGe/Si quantum well improved the short circuit current density and the efficiency by a factor of about 1.24 and 1.37, respectively. The best concentration and radius values obtained are x = 0.05 and r = 0.190 µm, respectively, with a strain of less than 1%.

Published
2023
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5. Improving the efficiency of a GaInP solar cell using an AlGaAs buffer layer by optimizing the thicknesses of the PN junction

Author

Djedoui, L., Aissat, A., Djemouai, A., Vilcot, Jean-Pierre, Laboratoire de Traitement de Signal et Imagerie [Blida] (LATSI), Université Saâd Dahlab Blida 1 (UB1), Faculté De Technologie Blida1, Université Mohamed El Bachir El Ibrahimi [Bordj Bou Arréridj], Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and The authors would like to thank the Tempus Esience project team (Project n°:530341-TEMPUS-1-2012-1-FR-TEMPUS-JPCR from 2012 to 2015) for providing us with the virtual labof the University of Bordj Bou Arreridj (UBBA vlab) and allowed us using the TCAD-Silvaco software to model and characterize our solar cells.

Subjects
[SPI]Engineering Sciences [physics]
Abstract

International audience

Published
2022
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6. Performance simulation of an InGaSb/GaSb based quantum well structure for laser diode applications

Author

Chenini, Lynda, Aissat, A., Halbwax, Mathieu, Vilcot, Jean-Pierre, Université Saâd Dahlab Blida 1 (UB1), Faculté De Technologie Blida1, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and no information

Subjects
[PHYS]Physics [physics], Detection, [SPI]Engineering Sciences [physics], Optoelectronic, Lasers, General Physics and Astronomy, Semiconductor, Nanostructures
Abstract

International audience; AbstractThe present study reports the impact of structural parameters on optoelectronic properties of InGasb/GaSb based quantum well structures (Qws). The laser diodes are designed to operate at 2.3 μm at 300 K. Numerical calculations of the emission wavelength, optical and modal gain of TE mode in InGaSb/GaSb laser diode structure have been carried out for various well material compositions, well thickness, number of quantum wells and temperature. The optical confinement factor and threshold current density are also simulated and reported. The calculations were performed using the 8-bands k.p model. For an injected carrier concentration of 1.56 × 1018 cm−3 at 300 K, peak gain value of the order of 1400 cm−1 is reached and a modal gain of 94 cm−1 can be obtained. A threshold current density around 3 kA/cm2, is expected to be obtained through optical losses of about 50 cm−1. The results show that InGaSb/GaSb quantum wells are appropriate for mid-infrared lasers operating at 300 K.

Published
2023
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7. Development of the multi-quantum wells structures based on InxGa1-x As1-yNy/GaAs for solar cells applications

Author

Aissat, Abdelkader, Bestam, Rachid, Boubakeur, Manel, Vilcot, Jean-Pierre, Université Saâd Dahlab Blida 1 (UB1), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Faculté De Technologie Blida1, Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)

Subjects
Semiconductor III-V-N, [SPI]Engineering Sciences [physics], Optoelectronic, New materials, Solar cell, Nanostructures
Abstract

International audience; In order to improve the solar cell efficiency, quantum multi-wells have been implanted into the intrinsic region of the structure. We can absorb the photons that have a lower energy than the bandgap energy. In this work, physical and optical phenomena that influence the efficiency of the solar cell have been modeled, simulated and optimized. In addition, the effects of indium (x) and nitrogen (N) concentrations, the quantum wells number (nQWs) and the quantum well width (Lw) on structural stability, bandgap energy, external quantum efficiency and the solar cell output parameters were studied. For indium and nitrogen concentrations x = 35%, y = 3.5% respectively, a quantum well width LW = 8 nm and quantum wells number nQWs of 50, we have obtained a strain (ε) of about 1.77%. The obtained external quantum efficiency (EQE) in this case is about 86.23%, while the efficiency (η) is 33.60%. We can improve this work by using other materials.

Published
2022
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8. Biofunctional gelatin-based films incorporated with food grade phycocyanin extracted from the Saharian cyanobacterium Arthrospira sp

Author

Suming Li, Moncef Nasri, Imene Chentir, Amel Doumandji, Hela Kchaou, Marwa Hamdi, Mourad Jridi, Faculté De Technologie Blida1, Université de Saâd Dahlab [Blida] (USDB ), École Nationale d'Ingénieurs de Sfax | National School of Engineers of Sfax (ENIS), Faculté des Sciences de Sfax, Université de Sfax - University of Sfax, Institut Européen des membranes (IEM), and Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)

Subjects
food.ingredient, Gelatin-based films, DPPH, General Chemical Engineering, Bioactivity, 01 natural sciences, Gelatin, chemistry.chemical_compound, 0404 agricultural biotechnology, food, 0103 physical sciences, Ultimate tensile strength, Phycocyanin, [CHIM]Chemical Sciences, Thermal stability, Solubility, 010304 chemical physics, Chemistry, Light-barrier properties, 04 agricultural and veterinary sciences, General Chemistry, 040401 food science, Antibacterial activity, Glass transition, Food Science, Nuclear chemistry
Abstract

International audience; Biofunctional films based on bovine gelatin (G) incorporated with a food grade phycocyanin (PC) extract at various concentrations (1.25%, 2.5%, 6.25% and 12.5%; w/w) were developed. PC incorporation maintained the original solubility of gelatin (control) film, while, when added at 6.25% and 12.5% (w/w), PC decreased the L* and increased b*, Delta E and the opacity values of the films, which enhances their light-barrier feature. Further, the tensile strength (TS) and elongation at break (EAB) were reduced with the increase of PC content in G-based films, and were inversely correlated to films thickness with respective R-2 values of 0.94 and 0.97. Regarding microstructure, PC eliminated cracks present in the control film matrix resulting in a more smooth structure. Moreover, PC addition contributed to the thermal stabilization of the gelatin chain, delaying the glass transition temperature by 20 degrees C and conferring a thermal stability up to 250 degrees C. Regarding the antioxidant activity, the incorporation of 12.5% of PC significantly increased by 4.09, 3.2, 13.6 and 1.47-folds the chelating, reducing, beta-carotene bleaching inhibition and DPPH radical scavenging capacities, respectively. Likewise, G-PC films displayed antibacterial activity against several Gram ( - ) and Gram ( + ) bacteria. The present study suggested that G-PC films incorporated with 6.25% and 12.5% of PC extracted from Arthrospira sp. could be used as a promising colored external or inner (secondary) functional packaging for dehydrated food products as well as for hard or soft-shelled capsules containing powdered or oily active ingredients, although further analysis should be carried out.

Published
2019
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9. Frequency response optimization of P-I-N photodiode based on InGaAsN lattice matched to GaAs for High-Speed photodetection applications

Author

Didier Decoster, R. Amraoui, Abdelkader Aissat, Jean-Pierre Vilcot, Faculté De Technologie Blida1, Université Saâd Dahlab Blida 1 (UB1), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and no information

Subjects
Stable structure, Frequency response, quaternary, Materials science, business.industry, Photodetection, Capacitance, Atomic and Molecular Physics, and Optics, Cutoff frequency, Electronic, Optical and Magnetic Materials, Photodiode, law.invention, p-i-n photodiode, [SPI]Engineering Sciences [physics], High-speed photo-detection, Depletion region, law, Attenuation coefficient, Optoelectronics, Quantum efficiency, InxGa1-xAs1-yNy, Electrical and Electronic Engineering, business
Abstract

International audience; This paper reports on pin photodiode frequency response optimization based on InxGa1-xAs1-yNy quaternary lattice matched to GaAs. Two transparent layers are placed on p-side and n-side in order to manage the photodiode frequency response limitations. The lattice matching condition is calculated in order to obtain stable structure. The physical and optical parameters calculations are performed at room temperature showing the impact of nitrogen on the absorption coefficient. A stable structure, having 2 % of nitrogen and 6% of indium, allows to achieve a cutoff frequency of about 116 GHz and a capacitance of 5.21fF while the quantum efficiency is 41.59% for a depletion region thickness of about 0.55 µm. However, in case of depletion region thickness of about 0.625 µm, the cutoff frequency degrades to 98 GHz while the capacitance diminishes to 4.58fF and the quantum efficiency increases to 51.56%. In addition, a comparative study with literature results has been carried out in order to show the advantages of the proposed photodiode. This comparison affirms that the proposed photodiode based on InGaAsN lattice matched to GaAs exhibits high-speed photo-detection. This work allowed us to obtain a p-i-n photodiode with stable structure suitable for photo-detection at 1.15 µm.

Published
2022
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10. Stability, bio-functionality and bio-activity of crude phycocyanin from a two-phase cultured Saharian Arthrospira sp. strain

Author

Suming Li, Amel Doumandji, Marwa Hamdi, Imene Chentir, Giorgos Markou, Moncef Nasri, Faculté De Technologie Blida1, Université de Saâd Dahlab [Blida] (USDB ), Faculté des Sciences de Sfax, Université de Sfax - University of Sfax, Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), Department of Natural Resources Management and Agricultural Engineering, and Agricultural University of Athens

Subjects
0106 biological sciences, Arthrospira sp, DPPH, Thermostabilization, 01 natural sciences, Bioactivity, chemistry.chemical_compound, 0404 agricultural biotechnology, 010608 biotechnology, Phycocyanin, [CHIM]Chemical Sciences, Solubility, Thermostability, biology, Pseudomonas, 04 agricultural and veterinary sciences, biology.organism_classification, 040401 food science, chemistry, Biofunctionality, Sorbitol, Micrococcus luteus, Antibacterial activity, Agronomy and Crop Science, Nuclear chemistry
Abstract

International audience; Crude phycocyanin extract (PC-E) from a two-phase cultured Saharian Arthrospira sp. strain with a purity grade of 1.24 (reagent grade) was characterized regarding its stability, bio-functionality and bio-activity. PC-E showed higher solubility values above pH 6.0, while the maximum stability was achieved at pH 6.0. PC-E was stable only up to 50 degrees C, while the addition of stabilizing agents (PEG-4000 and sorbitol) significantly enhanced thermostability. FTIR and DSC analysis revealed that thermostabilization by PEG-4000 and sorbitol addition was achieved through hydrogen bound and amorphous glass formation. Emulsifying and foaming properties of PC-E were concentration-dependent. PC-E displayed antioxidant activity in a dose dependent manner, including beta-carotene bleaching inhibition, ferrous chelating effect, and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of 63%, 78% and 100% at 5 mg mL(-1), respectively. Moreover, PC-E exhibited great antibacterial activity at 5 mg mL(-1) against Staphylococcus aureus, Micrococcus luteus, Escherichia colt and Pseudomonas sp.

Published
2018
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11. Experimental assessment of new fast MPPT algorithm for PV systems under non-uniform irradiance conditions

Author

Jean-Pierre Barbot, Ahmed Kheldoun, H. Salhi, R. Boukenoui, Adel Mellit, Rafik Bradai, Malek Ghanes, École Polytechnique de Montréal (EPM), Laboratoire de Traitement de Signal et Imagerie [Blida] (LATSI), Université de Saâd Dahlab [Blida] (USDB ), Faculté De Technologie Blida1, Université des Sciences et de la Technologie Houari Boumediene [Alger] (USTHB), Institut de Recherche en Communications et en Cybernétique de Nantes (IRCCyN), Mines Nantes (Mines Nantes)-École Centrale de Nantes (ECN)-Ecole Polytechnique de l'Université de Nantes (Polytech Nantes), Université de Nantes (UN)-Université de Nantes (UN)-PRES Université Nantes Angers Le Mans (UNAM)-Centre National de la Recherche Scientifique (CNRS), Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189 (CRIStAL), Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire QUARTZ (QUARTZ ), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Université Mohamed Seddik Ben Yahia [Jijel], Mines Nantes (Mines Nantes)-École Centrale de Nantes (ECN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Université Saâd Dahlab Blida 1 (UB1), Université des Sciences et de la Technologie Houari Boumediene = University of Sciences and Technology Houari Boumediene [Alger] (USTHB), Université Paris 8 Vincennes-Saint-Denis (UP8)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Université Mohammed Seddik Benyahia [Jijel] | University of Jijel (UMSBJ), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, and Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)

Subjects
Engineering, Maximum power principle, 020209 energy, 02 engineering and technology, Management, Monitoring, Policy and Law, 7. Clean energy, Fuzzy logic, Maximum power point tracking, Fast convergenceGlobal tracking, [SPI.AUTO]Engineering Sciences [physics]/Automatic, Control theory, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Point (geometry), Photovoltaic system, business.industry, Mechanical Engineering, 020208 electrical & electronic engineering, Building and Construction, Variable (computer science), General Energy, business, Hill climbing, Voltage, Experimental setup
Abstract

International audience; The paper carries out an experimental investigation of a new Maximum Power Point Tracking (MPPT) method for standalone Photovoltaic (PV) systems. The new method combines a novel mechanism of global maximum power point identifying loop when the system undergoes multiple maximum power points and the use of adaptive variable step Hill Climbing (HC) MPPT technique to track the identified Global Maximum Power Point (GMPP). To figure out the advantages of the proposed method, it is implemented together with three local MPPTs (e.g., two conventional MPPTs and fuzzy logic-based one) and compared with six recently developed Global MPPT methods. Obtained experimental results as well as comparison outcomes show that the proposed MPPT technique is fast while tracking GMPP (around 2.4 s) and resilient against perturbations that may occur during the operation of the PV system. Moreover, the proposed MPPT method boasts other advantages such as ease of implementation, no dependence on the PV system and requires only two conventional sensors of voltage and current respectively.

Published
2017
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12. Experimental assessment of Maximum Power Point Tracking methods for photovoltaic systems

Author

H. Salhi, Jean-Pierre Barbot, Malek Ghanes, R. Boukenoui, Adel Mellit, Rafik Bradai, Faculté De Technologie Blida1, Université de Saâd Dahlab [Blida] (USDB ), Institut de Recherche en Communications et en Cybernétique de Nantes (IRCCyN), Mines Nantes (Mines Nantes)-École Centrale de Nantes (ECN)-Ecole Polytechnique de l'Université de Nantes (Polytech Nantes), Université de Nantes (UN)-Université de Nantes (UN)-PRES Université Nantes Angers Le Mans (UNAM)-Centre National de la Recherche Scientifique (CNRS), Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189 (CRIStAL), Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire QUARTZ (QUARTZ ), Université Paris 8 Vincennes-Saint-Denis (UP8)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-SUPMECA - Institut supérieur de mécanique de Paris-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Laboratoire de Traitement de Signal et Imagerie [Blida] (LATSI), École Polytechnique de Montréal (EPM), Université Mohamed Seddik Ben Yahia [Jijel], Mines Nantes (Mines Nantes)-École Centrale de Nantes (ECN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Université Paris 8 Vincennes-Saint-Denis (UP8)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Université Saâd Dahlab Blida 1 (UB1), and Université Mohammed Seddik Benyahia [Jijel] | University of Jijel (UMSBJ)

Subjects
Engineering, Maximum power principle, 020209 energy, Irradiance, DSPACE, 02 engineering and technology, Efficiency Performance assessment, Industrial and Manufacturing Engineering, Maximum power point tracking, [SPI.AUTO]Engineering Sciences [physics]/Automatic, Control theory, Convergence (routing), 0202 electrical engineering, electronic engineering, information engineering, Point (geometry), Electrical and Electronic Engineering, Civil and Structural Engineering, Maximum Power Point Tracking, business.industry, Mechanical Engineering, 020208 electrical & electronic engineering, Photovoltaic system, Photovoltaic panel, Building and Construction, Pollution, Power (physics), General Energy, dSPACE, business
Abstract

International audience; This paper presents different Maximum Power Point Tracking (MPPT) methods belonging to different classes as well as two overviews. The first was about the procedures used in the test and evaluation of MPPTs. The second is an overview of Fuzzy Logic Controller (FLC) MPPTs and improved MPPTs. Conventional MPPTs such as Perturb and Observe (P&O), Hill Climbing (HC) and Incremental Conductance (InCond); Improved MPPTs (are the modified versions of conventional MPPTs) such as Improved Incremental Conductance (Improved-InCond) and intelligent MPPTs such as FLC have been implemented and tested under two different levels of irradiance and temperature. A detailed description about the hardware and software implementation platforms (designed and built in our laboratory) is provided. Based on measured data, the MPPTs under consideration have been evaluated and compared in terms of different criteria, showing the advantages and disadvantages of each one. The comparison results showed that Improved-InCond gives a fast convergence to the MPP(Maximum Power Point). Whereas, FLC is able to adapt to the variation of irradiance and temperature levels. Thereby, a good performance is obtained wherein the MPP is reached in a short time as well as the power ripples are very small.

Published
2017
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13. Magnetic Studies in Sputtered Ni/Ti Multilayers

Author

M. Abid, E.K. Hlil, H. Salhi, K. Chafai, H. Lassri, Faculté De Technologie Blida1, Université de Saâd Dahlab [Blida] (USDB ), Laboratoire d'Electronique et de Microélectronique [Monastir] (EμE), Faculté des Sciences de Monastir (FSM), and Université de Monastir - University of Monastir (UM)-Université de Monastir - University of Monastir (UM)

Subjects
Materials science, Condensed matter physics, Magnetometer, Exchange interaction, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, law.invention, Metal, Condensed Matter::Materials Science, Magnetization, Magnetic anisotropy, law, Sputtering, visual_art, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], visual_art.visual_art_medium, 010306 general physics, 0210 nano-technology, Anisotropy, Layer (electronics), ComputingMilieux_MISCELLANEOUS
Abstract

Magnetic properties of Ni/Ti multilayers, prepared by the DC triode sputtering method, have been studied by magnetic measurements. Both metal layers are crystalline with a (111) fiber structure when they are thicker than 20 A. The magnetization decreases with a decrease in Ni layer thickness tNi and the analysis of the results at 5 K indicates the presence of a dead Ni layer about 13 A thick. The effective anisotropy Keff of Ni/Ti multilayers is obtained using a torque magnetometer. Spin-wave theory has been used to explain the temperature dependence of the magnetization. Approximate values for bulk exchange interaction Jb, surface exchange interaction JS and interlayer coupling strength JI for various Ni layer thicknesses have been obtained.

Published
2011
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14. Spin-Wave Excitations in Evaporated Co/Pt Multilayers

Author

H. Lassri, H. Salhi, M. Abid, K. Chafai, E.K. Hlil, K. Benkirane, Lotfi Bessais, O. Msieh, Faculté De Technologie Blida1, Université de Saâd Dahlab [Blida] (USDB ), Laboratoire d'Electronique et de Microélectronique [Monastir] (EμE), Faculté des Sciences de Monastir (FSM), Université de Monastir - University of Monastir (UM)-Université de Monastir - University of Monastir (UM), Chimie métallurgique des terres rares (CMTR), and Centre National de la Recherche Scientifique (CNRS)

Subjects
Coupling constant, Magnetic measurements, Materials science, Condensed matter physics, Field (physics), Exchange interaction, Resonance, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Ferromagnetic resonance, Electronic, Optical and Magnetic Materials, Condensed Matter::Materials Science, Magnetization, Spin wave, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 010306 general physics, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS
Abstract

The magnetic behavior of evaporated Co/Nb multilayers has been investigated by magnetic measurements and ferromagnetic resonance (FMR). The modes of spin-wave (S-W) resonances were observed in some Co/Nb multilayers in FMR measurements. So, the S-Ws were sustained by the whole layers and propagated through the Nb layers. The dependence of the mode number n on the resonance field Hres is following the n2 law. As a result, the interlayer coupling constant (JI) was determined. A S-W theory has been applied to explain the variation of the magnetization versus temperature and hence to estimate the approximate values of the bulk exchange interaction (Jb) and interface exchange interaction (Jint) for various Co/Nb multilayers.

Published
2011
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15. Magnetic studies in evaporated Ni/Pd multilayers

Author

H. Lassri, Z. Yamkane, R. Krishnan, E.K. Hlil, M. Lassri, M. Abid, H. Salhi, K. Chafai, Faculté De Technologie Blida1, Université de Saâd Dahlab [Blida] (USDB ), Laboratoire d'Electronique et de Microélectronique [Monastir] (EμE), Faculté des Sciences de Monastir (FSM), and Université de Monastir - University of Monastir (UM)-Université de Monastir - University of Monastir (UM)

Subjects
Materials science, Condensed matter physics, Exchange interaction, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Evaporation (deposition), Electronic, Optical and Magnetic Materials, Magnetization, Magnetic anisotropy, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 010306 general physics, 0210 nano-technology, Spontaneous magnetization, Layer (electronics), ComputingMilieux_MISCELLANEOUS
Abstract

The magnetic properties of Ni/Pd multilayers, prepared by sequential evaporation in ultrahigh vacuum, have been studied. The Ni thickness dependence of the magnetization and magnetic anisotropy is discussed. The temperature dependence of the spontaneous magnetization is well described by a T3/2 law in all multilayers. A spin-wave theory has been used to explain the temperature dependence of the spontaneous magnetization, and the approximate values for the exchange interactions for various Ni layer thicknesses have been obtained.

Published
2011
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