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Partager le résultat de cette recherche Interroger des sources externesElaboration et caractérisation des couches minces de matériau CZTS (Cu2ZnSnS4) obtenues par voie sol gel / Mohamed Cherif Benachour
Titre : Elaboration et caractérisation des couches minces de matériau CZTS (Cu2ZnSnS4) obtenues par voie sol gel : Applications a la photovoltaïque. Type de document : texte imprimé Auteurs : Mohamed Cherif Benachour, Auteur ; Rabah Bensaha, Directeur de thèse Mention d'édition : 05/11/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 122 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique: sciences des matériaux sciences des matériaux:Céramique CZTS dip-coating sol gel DRX cellule solaire solar cell PL طلاء بالغمس سائل الهلام ،خلية شمسية الاستضاءة الضوئية Index. décimale : 530 Physique Résumé :
Recently, considerable work has been done on the Cu2ZnSnS4 (CZTS) quaternary compound semiconductor, due to its simplicity, low cost and above all its flexibility in the combination of several chemical compounds, to make it a good absorbent layer for thin film solar cells and thermoelectric energy generator. CZTS thin films are a kind of p-type direct band gap semiconductor with a band gap value of Eg ≈ 1.5 eV for photoelectric energy conversion and are characterized by a large absorption coefficient (> 104 cm - 1). In this way, the aim of the present work is to study the parameters of the annealing temperature and optimal annealing time for the formation of pure CZTS thin layer. For this, we have developed a simple and non-toxic sulfur-free process using the sol gel process and the vacuum channels to prepare the thin layers of pure CZTS phase deposited on glass substrates by dip-coating technique and annealed at different temperatures. and different annealing times. We studied the effect of annealing temperature on the optical properties of CZTS thin films. The last ones were deposited by dip-coating technique using the sol-gel method. They found that increasing the annealing temperature from 200 to 500 °C for one hour (1h) reduced
the energy gap from 1.72 to 1.50 eV. So, they judged that these thin layers are good for solar cells. Consideration of these results prompted us to study the effect of the annealing time from 5 to 60 min on the properties of CZTS thin films. The samples obtained were studied by several techniques such as XRD, Raman spectroscopy, SEM, Atomic force microscopy (AFM), UV-vis spectroscopy and photoluminescence. Confirmed by Raman spectroscopy, XRD analysis reveals the formation of a single-phase Cu2ZnSnS4 compound, of quasistoichiometric composition, in the tetragonal structure of kesterite with a preferential orientation along the direction [112]. The grain size tends to increase as the duration of the annealing increases and the temperature of the annealing also increases, a result confirmed by SEM. The study of the morphology by SEM and AFM confirms that the thin films thus produced are homogeneous, without cracking, of nanometric structure and having a very low roughness (of the order of 1 nm). Optical measurements analysis reveals that the layers have a relatively high absorption coefficient in the visible spectrum with a range gap of 1.62−1.50 eV, which is somewhat close to the optimal value of the solar cell. The Luminous Spectra (PL) shows broad bands with a limited intensity of a maximum between 1.62 and 1.50 eV, corresponding to the optical range gap of CZTS and increasing with the annealing time. The study of electrical properties using I(V) also showed that increasing annealing time improves the electrical properties of the structure. In addition, we examined the problem of secondary phases and suggested a way to avoid its formation.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/physique/BEN7667.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11501 Elaboration et caractérisation des couches minces de matériau CZTS (Cu2ZnSnS4) obtenues par voie sol gel : Applications a la photovoltaïque. [texte imprimé] / Mohamed Cherif Benachour, Auteur ; Rabah Bensaha, Directeur de thèse . - 05/11/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 122 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique: sciences des matériaux sciences des matériaux:Céramique CZTS dip-coating sol gel DRX cellule solaire solar cell PL طلاء بالغمس سائل الهلام ،خلية شمسية الاستضاءة الضوئية Index. décimale : 530 Physique Résumé :
Recently, considerable work has been done on the Cu2ZnSnS4 (CZTS) quaternary compound semiconductor, due to its simplicity, low cost and above all its flexibility in the combination of several chemical compounds, to make it a good absorbent layer for thin film solar cells and thermoelectric energy generator. CZTS thin films are a kind of p-type direct band gap semiconductor with a band gap value of Eg ≈ 1.5 eV for photoelectric energy conversion and are characterized by a large absorption coefficient (> 104 cm - 1). In this way, the aim of the present work is to study the parameters of the annealing temperature and optimal annealing time for the formation of pure CZTS thin layer. For this, we have developed a simple and non-toxic sulfur-free process using the sol gel process and the vacuum channels to prepare the thin layers of pure CZTS phase deposited on glass substrates by dip-coating technique and annealed at different temperatures. and different annealing times. We studied the effect of annealing temperature on the optical properties of CZTS thin films. The last ones were deposited by dip-coating technique using the sol-gel method. They found that increasing the annealing temperature from 200 to 500 °C for one hour (1h) reduced
the energy gap from 1.72 to 1.50 eV. So, they judged that these thin layers are good for solar cells. Consideration of these results prompted us to study the effect of the annealing time from 5 to 60 min on the properties of CZTS thin films. The samples obtained were studied by several techniques such as XRD, Raman spectroscopy, SEM, Atomic force microscopy (AFM), UV-vis spectroscopy and photoluminescence. Confirmed by Raman spectroscopy, XRD analysis reveals the formation of a single-phase Cu2ZnSnS4 compound, of quasistoichiometric composition, in the tetragonal structure of kesterite with a preferential orientation along the direction [112]. The grain size tends to increase as the duration of the annealing increases and the temperature of the annealing also increases, a result confirmed by SEM. The study of the morphology by SEM and AFM confirms that the thin films thus produced are homogeneous, without cracking, of nanometric structure and having a very low roughness (of the order of 1 nm). Optical measurements analysis reveals that the layers have a relatively high absorption coefficient in the visible spectrum with a range gap of 1.62−1.50 eV, which is somewhat close to the optimal value of the solar cell. The Luminous Spectra (PL) shows broad bands with a limited intensity of a maximum between 1.62 and 1.50 eV, corresponding to the optical range gap of CZTS and increasing with the annealing time. The study of electrical properties using I(V) also showed that increasing annealing time improves the electrical properties of the structure. In addition, we examined the problem of secondary phases and suggested a way to avoid its formation.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/physique/BEN7667.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11501 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/7667 BEN/7667 Thèse Bibliothèque principale Thèses Disponible
Titre : Realization and electrical characterization of thin film heterojunction for photovoltaic application. Type de document : texte imprimé Auteurs : Fatima Zohra Boutebakh, Auteur ; Nadhir Attaf, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 173 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
PhysiqueTags : couches minces CZTS spray pyrolyse hétérojonction cellules solaire thin films spray pyrolysis hetero-junction solar cells شرائح رقيقة CZTSالرش الحرارى وصلة غير متجانسة الخلايا الشمسية Index. décimale : 530 Physique Résumé : The present work deals with the deposition of CZTS thin films and related devices by a simple and cheap technique such as Spray Pyrolysis (SP). For this purpose, a set of CZTS thin film was prepared using various deposition conditions in order to optimize the deposition conditions allow us to prepare suitable films devoted to the photovoltaic applications. The studied deposition parameters were the substrate temperature, deposition time, and copper and zinc salt concentrations. The structural analysis shows that the obtained films are polycrystalline; they exhibit a tetragonal structure with a preferential orientation along (112). However, the structural properties and secondary phases were affected by the deposition conditions. From the optical and electrical characterization results, we inferred that the deposited films have suitable optoelectronic properties for the photovoltaic applications, since they present a good absorption in the visible range coupled with a higher conductivity. Finally; the fabricated CZTS heterojunction with various back contacts show a rectification behavior, the G-f characterization reveals the presence of interface state at CZTS/ZnS interface with a state density in the order of 1010 eV-1cm-2. The addition of ZnO intrinsic layer enhances the heterojunction device properties. Whereas, the solar cells based CZTS/CdS annealed at 450 °C under H2S gas show the best solar cell efficiency about 0.43 % and a current density equal 9.8 mA/cm2.
Diplôme : Doctorat En ligne : ../theses/physique/BOU7355.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11004 Realization and electrical characterization of thin film heterojunction for photovoltaic application. [texte imprimé] / Fatima Zohra Boutebakh, Auteur ; Nadhir Attaf, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 173 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
PhysiqueTags : couches minces CZTS spray pyrolyse hétérojonction cellules solaire thin films spray pyrolysis hetero-junction solar cells شرائح رقيقة CZTSالرش الحرارى وصلة غير متجانسة الخلايا الشمسية Index. décimale : 530 Physique Résumé : The present work deals with the deposition of CZTS thin films and related devices by a simple and cheap technique such as Spray Pyrolysis (SP). For this purpose, a set of CZTS thin film was prepared using various deposition conditions in order to optimize the deposition conditions allow us to prepare suitable films devoted to the photovoltaic applications. The studied deposition parameters were the substrate temperature, deposition time, and copper and zinc salt concentrations. The structural analysis shows that the obtained films are polycrystalline; they exhibit a tetragonal structure with a preferential orientation along (112). However, the structural properties and secondary phases were affected by the deposition conditions. From the optical and electrical characterization results, we inferred that the deposited films have suitable optoelectronic properties for the photovoltaic applications, since they present a good absorption in the visible range coupled with a higher conductivity. Finally; the fabricated CZTS heterojunction with various back contacts show a rectification behavior, the G-f characterization reveals the presence of interface state at CZTS/ZnS interface with a state density in the order of 1010 eV-1cm-2. The addition of ZnO intrinsic layer enhances the heterojunction device properties. Whereas, the solar cells based CZTS/CdS annealed at 450 °C under H2S gas show the best solar cell efficiency about 0.43 % and a current density equal 9.8 mA/cm2.
Diplôme : Doctorat En ligne : ../theses/physique/BOU7355.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11004 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7355 BOU/7355 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution à l’étude des photopiles à base de nouveaux matériaux photovoltaïques. Type de document : texte imprimé Auteurs : Abdelbaki Cherouana, Auteur ; Rebiha Labbani, Directeur de thèse Mention d'édition : 01/07/2019 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 132 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique: Énergies Renouvelables CZTS cellule solaire modélisation simulation optimisation solar cell modeling optimization خلية شمسية نموذجه محاكاة التحسين Index. décimale : 530 Physique Résumé :
Photovoltaic energy source is attracting great attention and employed in several domains. Actually, the major challenge is the improvement of the power/costs ratio. Consequently, several photovoltaic devices (such as thin film solar cells) have been employed by researchers to obtain low cost and high efficiency solar cells. Copper Zinc Tin Sulfide is a promising candidate for achieving the requirement of low cost and eco-friendly solar cells. In this dissertation, the main objective is to serve experimenters in order to save time and money needed for solar cells manufacturing. Our study was based on modeling and simulation of CZTS solar cells. Interesting results have been obtained. We succeeded to determine the technological and geometrical parameters of each area. An optimization between absorber; buffer and back metal contact layers has been performed. The best results that have been obtained were efficiencies of 10% and 9.47% for ZnS/CZTS and CdS/CZTSSe solar cells respectively. On the other hand, we sized a street lighting system for Constantine site. The photovoltaic generator consisted of two solar modules where each module was composed of 20 CZTSSe based solar cells.
Note de contenu :
Annexe.Diplôme : Doctorat en sciences En ligne : ../theses/physique/CHE7515.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11354 Contribution à l’étude des photopiles à base de nouveaux matériaux photovoltaïques. [texte imprimé] / Abdelbaki Cherouana, Auteur ; Rebiha Labbani, Directeur de thèse . - 01/07/2019 . - جامعة الإخوة منتوري قسنطينة, 2019 . - 132 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique: Énergies Renouvelables CZTS cellule solaire modélisation simulation optimisation solar cell modeling optimization خلية شمسية نموذجه محاكاة التحسين Index. décimale : 530 Physique Résumé :
Photovoltaic energy source is attracting great attention and employed in several domains. Actually, the major challenge is the improvement of the power/costs ratio. Consequently, several photovoltaic devices (such as thin film solar cells) have been employed by researchers to obtain low cost and high efficiency solar cells. Copper Zinc Tin Sulfide is a promising candidate for achieving the requirement of low cost and eco-friendly solar cells. In this dissertation, the main objective is to serve experimenters in order to save time and money needed for solar cells manufacturing. Our study was based on modeling and simulation of CZTS solar cells. Interesting results have been obtained. We succeeded to determine the technological and geometrical parameters of each area. An optimization between absorber; buffer and back metal contact layers has been performed. The best results that have been obtained were efficiencies of 10% and 9.47% for ZnS/CZTS and CdS/CZTSSe solar cells respectively. On the other hand, we sized a street lighting system for Constantine site. The photovoltaic generator consisted of two solar modules where each module was composed of 20 CZTSSe based solar cells.
Note de contenu :
Annexe.Diplôme : Doctorat en sciences En ligne : ../theses/physique/CHE7515.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11354 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHE/7515 CHE/7515 Thèse Bibliothèque principale Thèses Disponible 
Titre : Elaboration et caractérisation de couches absorbantes des cellules solaires en couches minces à base de Cu2ZnSnS4 Type de document : texte imprimé Auteurs : Ouarda Daranfed, Auteur ; Mohamed Salah Aida, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2013 Importance : 133 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : CZTS spray ultrasonique DRX cellule solaire conductivité électrique spray ultrasonic solar cell, electrical conductivity الرش فوق الصوتي خلیة شمسیة المقاومیة الكهربائیة Index. décimale : 530 Physique Résumé : Among the most promoter quaternary semiconductors for the thin film solar cells fabrication, the Cu2ZnSnS4. Our choice is oriented on the quaternary thin film Cu2ZnSnS4 (CZTS) as a new film absorber with good physical properties (band gap energy from 1.4 to 1.6 eV with a large absorption coefficient over 104 cm-1). In addition, whose impact on the environment is very harmful. This part is carried in order to optimize the different parameters and to understand the growth mechanism of films deposited by spray method. These layers
are analyzed by various techniques of characterization of materials.
We have repaired a set of CZTS thin film with variable conditions such as substrate temperature, deposition time and salt of Zn source. The various deposited characterizations have shown that the fundamental properties depend on the deposition conditions. The XRD spectra have shown that films obtained from Zinc acetate have a coexistence of crystalline phase orientation CZTS preferentially along the direction [112] and a phase secondary ZnSnO3. The value of the optic gap varies from 1.4 to 1.6 eV, one places the thin films of CZTS like a serious candidate for their use like absorbing layer in the cells solar in thin film.
The electrical measurements indicated that the films conductivity varies in [0.7 – 6 (Ω.cm)-1].Diplôme : Doctorat en sciences En ligne : ../theses/physique/DAR6331.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6301 Elaboration et caractérisation de couches absorbantes des cellules solaires en couches minces à base de Cu2ZnSnS4 [texte imprimé] / Ouarda Daranfed, Auteur ; Mohamed Salah Aida, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2013 . - 133 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : CZTS spray ultrasonique DRX cellule solaire conductivité électrique spray ultrasonic solar cell, electrical conductivity الرش فوق الصوتي خلیة شمسیة المقاومیة الكهربائیة Index. décimale : 530 Physique Résumé : Among the most promoter quaternary semiconductors for the thin film solar cells fabrication, the Cu2ZnSnS4. Our choice is oriented on the quaternary thin film Cu2ZnSnS4 (CZTS) as a new film absorber with good physical properties (band gap energy from 1.4 to 1.6 eV with a large absorption coefficient over 104 cm-1). In addition, whose impact on the environment is very harmful. This part is carried in order to optimize the different parameters and to understand the growth mechanism of films deposited by spray method. These layers
are analyzed by various techniques of characterization of materials.
We have repaired a set of CZTS thin film with variable conditions such as substrate temperature, deposition time and salt of Zn source. The various deposited characterizations have shown that the fundamental properties depend on the deposition conditions. The XRD spectra have shown that films obtained from Zinc acetate have a coexistence of crystalline phase orientation CZTS preferentially along the direction [112] and a phase secondary ZnSnO3. The value of the optic gap varies from 1.4 to 1.6 eV, one places the thin films of CZTS like a serious candidate for their use like absorbing layer in the cells solar in thin film.
The electrical measurements indicated that the films conductivity varies in [0.7 – 6 (Ω.cm)-1].Diplôme : Doctorat en sciences En ligne : ../theses/physique/DAR6331.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6301 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité DAR/6331 DAR/6331 Thèse Bibliothèque principale Thèses Disponible Documents numériques
texte intégraleAdobe Acrobat PDF
Titre : Elaboratioon et caractérisation de couche absorbante des cellules solaires en couches minces à base de Cu2ZnSnS4 Type de document : texte imprimé Auteurs : Ramzi Fassi, Auteur ; N. Attaf, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2012 Importance : 129 f. Format : 31 cm. Note générale : Magister
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : CZTS spray ultrasonique DRX cellule solaire résistivité électrique Index. décimale : 530 Physique En ligne : ../theses/physique/FAS6244.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6196 Elaboratioon et caractérisation de couche absorbante des cellules solaires en couches minces à base de Cu2ZnSnS4 [texte imprimé] / Ramzi Fassi, Auteur ; N. Attaf, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2012 . - 129 f. ; 31 cm.
Magister
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : CZTS spray ultrasonique DRX cellule solaire résistivité électrique Index. décimale : 530 Physique En ligne : ../theses/physique/FAS6244.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6196 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité FAS/6244 FAS/6244 Thèse Bibliothèque principale Thèses Disponible
