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Auteur Mohamed Remram |
Documents disponibles écrits par cet auteur (15)
Affiner la recherche Interroger des sources externesAmélioration du rendement des cellules solaires organiques à base de polymères conjugués. / Fathi Brioua
Titre : Amélioration du rendement des cellules solaires organiques à base de polymères conjugués. Type de document : texte imprimé Auteurs : Fathi Brioua, Auteur ; Mohamed Remram, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 95 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Cellule solaire organique P3HT:PCBM semi-conducteurs inorganique coefficient
d'absorption taux de génération méthode des éléments finis Organic solar cell P3HT: PCBM inorganic semiconductors absorption coefficient generation rate finite element method الخلایا الشمسیة العضویة أشباه الموصلات غیر العضویة معامل الامتصاص معدل التولید طریقة
العناصر المحدودة .P3HT:PCBIndex. décimale : 621 Electronique Résumé : Research on organic solar cells based on semiconductors has a great interest, because this type of cells has very interesting properties, particularly in their flexibility, and the possibility of being made with large areas, compared to inorganic solar cells.In this contribution, we are interested to study the effect of the structure geometry of these cells, precisely the influence of the active layer thickness on the efficiency of these cells which is based on the use of interpenetrating network materials (P3HT: PCBM) of bulk-heterojunction solar cells. In a first phase, the electrical characteristics can be calculated and explored by a optical study consecrated to explore the optical properties of these cells such as the absorption coefficient and the generation rate that govern the absorption properties of the solar cell and based on the latter coefficients in conjunction of the experimental data, we calculated the charge carriers motilities into the active layer. In the second phase, we made another study on the effect of the electric charges recombination into the active layer (P3HT:PCBM) in order to know the probability of the carriers of the charges recombination in vicinity of the donor / acceptor interface for each studied micro device, everything was done by the solar cell simulator (Comsol Multiphysics) that based on the finite element method. The final phase is consecrated for the comparison of our new obtained results with both numerical and experimental approaches provided by the literature in order to validate our proposed approach.
Diplôme : Doctorat Permalink : index.php?lvl=notice_display&id=10992 Amélioration du rendement des cellules solaires organiques à base de polymères conjugués. [texte imprimé] / Fathi Brioua, Auteur ; Mohamed Remram, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 95 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Cellule solaire organique P3HT:PCBM semi-conducteurs inorganique coefficient
d'absorption taux de génération méthode des éléments finis Organic solar cell P3HT: PCBM inorganic semiconductors absorption coefficient generation rate finite element method الخلایا الشمسیة العضویة أشباه الموصلات غیر العضویة معامل الامتصاص معدل التولید طریقة
العناصر المحدودة .P3HT:PCBIndex. décimale : 621 Electronique Résumé : Research on organic solar cells based on semiconductors has a great interest, because this type of cells has very interesting properties, particularly in their flexibility, and the possibility of being made with large areas, compared to inorganic solar cells.In this contribution, we are interested to study the effect of the structure geometry of these cells, precisely the influence of the active layer thickness on the efficiency of these cells which is based on the use of interpenetrating network materials (P3HT: PCBM) of bulk-heterojunction solar cells. In a first phase, the electrical characteristics can be calculated and explored by a optical study consecrated to explore the optical properties of these cells such as the absorption coefficient and the generation rate that govern the absorption properties of the solar cell and based on the latter coefficients in conjunction of the experimental data, we calculated the charge carriers motilities into the active layer. In the second phase, we made another study on the effect of the electric charges recombination into the active layer (P3HT:PCBM) in order to know the probability of the carriers of the charges recombination in vicinity of the donor / acceptor interface for each studied micro device, everything was done by the solar cell simulator (Comsol Multiphysics) that based on the finite element method. The final phase is consecrated for the comparison of our new obtained results with both numerical and experimental approaches provided by the literature in order to validate our proposed approach.
Diplôme : Doctorat Permalink : index.php?lvl=notice_display&id=10992 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BRI/7342 BRI/7342 Thèse Bibliothèque principale Thèses Disponible 
Titre : Caractérisation et analyse des cellules solaires à base de silicium multicristallin Type de document : texte imprimé Auteurs : Zohra Benmohamed ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse Année de publication : 2009 Importance : 95 f. Format : 30 cm Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Caractérisation Analyse Cellules solaires Silicium multicristallin Impurities Dislocations Multicrystalline silicon Solar cells Efficiency
الشوائب العيوب البنيوية السليسيوم متعدد البلوراتالخلايا الشمسية المردودIndex. décimale : 621 Electronique Résumé : An understanding of the comportment of defects and Impurities in multicrystalline silicon in turn leads
to a clearer picture of the limiting mechanisms in solar cells made with this promising material, and points to
possible paths for improvement. In this study a three diagnostic approach has been adopted for the
characterization of multicrystalline silicon samples, it comprises structural, chemical and electrical analysis of
the various minority diffusion length limiting defects and impurities which are responsible for the degradation of
the performances of multicrystalline silicon solar cells.
Preferential defect etching ions provided for the structural analysis. This approach was useful in
determining the nature and distribution of the structural defects. The work then focuses on chemical
characterization of impurities and the analytical tool used for this purpose were Fourier Transform Infra-red
Spectroscopy (FTIR). The results of annealing processes shown that, Rapid Thermal Annealing can dissociate
some oxygen precipitates existing in silicon material. This dissociation is accompanied by a degradation of the
bulk diffusion length. The effect of RTA on oxygen precipitation is extensively depending on the thermal history
of the material, the initial oxygen content and the existing precipitates in the material.
The above characterization tools were well complemented by electrical characterization through
Surface photovoltage (SPV) to determined minority diffusion length.
The results of PC1D modelling on multicrystalline silicon solar cells revealed that dislocations are not
the major factor that influences electrical properties of material. Impurities which were already present in the
grown material in an inactive form in particular the growth of oxygen precipitates and metallic impurities and
which have been electrically activated in an inhomogeneous distribution are also a principal source of
deterioration of polycrystalline silicon solar cells performances.
Thus there is a scope for attaining still higher efficiencies by further optimization of growth material
and cell processes to reduce reflection loss and effectively trapping the light inside the cell.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/BEN5287.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=2774 Caractérisation et analyse des cellules solaires à base de silicium multicristallin [texte imprimé] / Zohra Benmohamed ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse . - 2009 . - 95 f. ; 30 cm.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Caractérisation Analyse Cellules solaires Silicium multicristallin Impurities Dislocations Multicrystalline silicon Solar cells Efficiency
الشوائب العيوب البنيوية السليسيوم متعدد البلوراتالخلايا الشمسية المردودIndex. décimale : 621 Electronique Résumé : An understanding of the comportment of defects and Impurities in multicrystalline silicon in turn leads
to a clearer picture of the limiting mechanisms in solar cells made with this promising material, and points to
possible paths for improvement. In this study a three diagnostic approach has been adopted for the
characterization of multicrystalline silicon samples, it comprises structural, chemical and electrical analysis of
the various minority diffusion length limiting defects and impurities which are responsible for the degradation of
the performances of multicrystalline silicon solar cells.
Preferential defect etching ions provided for the structural analysis. This approach was useful in
determining the nature and distribution of the structural defects. The work then focuses on chemical
characterization of impurities and the analytical tool used for this purpose were Fourier Transform Infra-red
Spectroscopy (FTIR). The results of annealing processes shown that, Rapid Thermal Annealing can dissociate
some oxygen precipitates existing in silicon material. This dissociation is accompanied by a degradation of the
bulk diffusion length. The effect of RTA on oxygen precipitation is extensively depending on the thermal history
of the material, the initial oxygen content and the existing precipitates in the material.
The above characterization tools were well complemented by electrical characterization through
Surface photovoltage (SPV) to determined minority diffusion length.
The results of PC1D modelling on multicrystalline silicon solar cells revealed that dislocations are not
the major factor that influences electrical properties of material. Impurities which were already present in the
grown material in an inactive form in particular the growth of oxygen precipitates and metallic impurities and
which have been electrically activated in an inhomogeneous distribution are also a principal source of
deterioration of polycrystalline silicon solar cells performances.
Thus there is a scope for attaining still higher efficiencies by further optimization of growth material
and cell processes to reduce reflection loss and effectively trapping the light inside the cell.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/BEN5287.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=2774 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/5287 BEN/5287 Thèse Bibliothèque principale Thèses Disponible
Titre : contribution a l'etude des tandems ََAlGaAs/Si dans les cellules solaires Type de document : texte imprimé Auteurs : Lemia Semra, Auteur ; Mohamed Remram, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 1998 Importance : 114 f. Format : 30 cm. Note générale : 2 copies imprimée disponibles Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Cellule Solaire Tandem AlGaAs Si Rendement Index. décimale : 621 Electronique Résumé : High efficiency photovoltaic devices are based both on the ill-V compounds and silicon semiconductor technologies. These devices are of both single and multijunction configurations. A tandem solar cell including more than two junctions is one of the candidates for photovoltaic cell.
Among many material systems, the AIGaAs/Si monolithic tandem solar cell is attractive for its high efficiency, low cost and large-area photovoltaic cell from the band-gap-energy point ofview.
The aim of this work is focused on semiconducting materials in Si and AlxGa'_xAs on the Si substrate and the AIGaAs/Si monolithic tandem solar cell. The optimum efficiency is determined taking into
account the different factors affecting the photogenerated current, open circuit voltage and fill factor. The most considerable subject of this study in the top cell is its emitter region. The judicious choice of aluminium content of the AIGaAs layer is the particular considered point, because results reveal that efficiency decreases with increasing AI composition. Also the thickness and doping concentration are examined. Shallow and highly doped emitter improve the efficiency High doping level effects in Si solar cells (the bottom cell) in the two regions particularly in the base are
investigated taking into account the free carrier absorption. these improve considerably the open voltage and efficiency. Since, the AlGaAs/Si tandem solar cells are promising for both terrestrial and space applications, it is the object of this work to perform modeling studies in one dimension and to
determine their maximum attaignable global and AMO efficiencies. Modeling and simulation are performed using PC 1 D simulator.Diplôme : Magistère En ligne : ../theses/electronique/SEM3186.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10254 contribution a l'etude des tandems ََAlGaAs/Si dans les cellules solaires [texte imprimé] / Lemia Semra, Auteur ; Mohamed Remram, Directeur de thèse . - Constantine : Université Mentouri Constantine, 1998 . - 114 f. ; 30 cm.
2 copies imprimée disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Cellule Solaire Tandem AlGaAs Si Rendement Index. décimale : 621 Electronique Résumé : High efficiency photovoltaic devices are based both on the ill-V compounds and silicon semiconductor technologies. These devices are of both single and multijunction configurations. A tandem solar cell including more than two junctions is one of the candidates for photovoltaic cell.
Among many material systems, the AIGaAs/Si monolithic tandem solar cell is attractive for its high efficiency, low cost and large-area photovoltaic cell from the band-gap-energy point ofview.
The aim of this work is focused on semiconducting materials in Si and AlxGa'_xAs on the Si substrate and the AIGaAs/Si monolithic tandem solar cell. The optimum efficiency is determined taking into
account the different factors affecting the photogenerated current, open circuit voltage and fill factor. The most considerable subject of this study in the top cell is its emitter region. The judicious choice of aluminium content of the AIGaAs layer is the particular considered point, because results reveal that efficiency decreases with increasing AI composition. Also the thickness and doping concentration are examined. Shallow and highly doped emitter improve the efficiency High doping level effects in Si solar cells (the bottom cell) in the two regions particularly in the base are
investigated taking into account the free carrier absorption. these improve considerably the open voltage and efficiency. Since, the AlGaAs/Si tandem solar cells are promising for both terrestrial and space applications, it is the object of this work to perform modeling studies in one dimension and to
determine their maximum attaignable global and AMO efficiencies. Modeling and simulation are performed using PC 1 D simulator.Diplôme : Magistère En ligne : ../theses/electronique/SEM3186.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10254 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SEM/3186 SEM/3186 Thèse Bibliothèque principale Thèses Disponible
Titre : Elaboration et caractérisation de nouveaux verres à base d'oxydes de baryum de strontium et de zinc Type de document : texte imprimé Auteurs : Hamid Satha ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse Année de publication : 1997 Importance : 108 f. Note générale : 02 Disponibles au magasin de la bibliothèque centrale
01 Disponible à la salle de rechercheLangues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Verre Zinc Oxyde Baryum Strontium Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3073 Elaboration et caractérisation de nouveaux verres à base d'oxydes de baryum de strontium et de zinc [texte imprimé] / Hamid Satha ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse . - 1997 . - 108 f.
02 Disponibles au magasin de la bibliothèque centrale
01 Disponible à la salle de recherche
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Verre Zinc Oxyde Baryum Strontium Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3073 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SAT/2965 SAT/2965 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude des cellules photovolta?ques à base de GaInP et GaAs à haut rendement Type de document : texte imprimé Auteurs : Zakaria Abada ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse Année de publication : 2000 Importance : 77 f. Format : 30 cm Note générale : 01 exp. disponible dans la salle de recherche
02 exp. disponible au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Cellule photovolta?que GaInP . GaAs Index. décimale : 621 Electronique Permalink : index.php?lvl=notice_display&id=2529 Etude des cellules photovolta?ques à base de GaInP et GaAs à haut rendement [texte imprimé] / Zakaria Abada ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse . - 2000 . - 77 f. ; 30 cm.
01 exp. disponible dans la salle de recherche
02 exp. disponible au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Cellule photovolta?que GaInP . GaAs Index. décimale : 621 Electronique Permalink : index.php?lvl=notice_display&id=2529 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ABA/3375 ABA/3375 Thèse Bibliothèque principale Thèses Disponible
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