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Author: Mohaidine Abani
Publisher:
ISBN:
Category :
Languages : fr
Pages : 304
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Book Description
DES COUCHES MINCES D'ITO (OXYDE D'INDIUM ET D'ETAIN) ET DE MOSE::(2) ONT ETE PREPAREES PAR PULVERISATION RF MAGNETRON POUR APPLICATIONS DANS LE DOMAINE DE L'ELECTROOPTIQUE ET DE LA CONVERSION DE L'ENERGIE PHOTOELECTROCHIMIQUE DE L'ENERGIE SOLAIRE. ETUDE DE L'INFLUENCE DES CONDITIONS DE PREPARATION ET DE TRAITEMENTS THERMIQUES SUR LES PROPRIETES OPTIQUES, ELECTRIQUES ET PHOTOELECTROCHIMIQUES DE CES COUCHES. CARACTERISATION PHYSICOCHIMIQUE DES FILMS (STRUCTURE ET TAUX DE CRISTALLISATION EN DIFFRACTION X, COMPOSITION EN MICROANALYSE NUCLEAIRE (RBS, PIXE) ET SONDE DE CASTAING, MORPHOLOGIE EN MICROSCOPIE ELECTRONIQUE A BALAYAGE ET A TRANSMISSION EN FONCTION DES CONDITIONS DE DEPOT ET DE TRAITEMENTS THERMIQUES
Author: Mohaidine Abani
Publisher:
ISBN:
Category :
Languages : fr
Pages : 304
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Book Description
DES COUCHES MINCES D'ITO (OXYDE D'INDIUM ET D'ETAIN) ET DE MOSE::(2) ONT ETE PREPAREES PAR PULVERISATION RF MAGNETRON POUR APPLICATIONS DANS LE DOMAINE DE L'ELECTROOPTIQUE ET DE LA CONVERSION DE L'ENERGIE PHOTOELECTROCHIMIQUE DE L'ENERGIE SOLAIRE. ETUDE DE L'INFLUENCE DES CONDITIONS DE PREPARATION ET DE TRAITEMENTS THERMIQUES SUR LES PROPRIETES OPTIQUES, ELECTRIQUES ET PHOTOELECTROCHIMIQUES DE CES COUCHES. CARACTERISATION PHYSICOCHIMIQUE DES FILMS (STRUCTURE ET TAUX DE CRISTALLISATION EN DIFFRACTION X, COMPOSITION EN MICROANALYSE NUCLEAIRE (RBS, PIXE) ET SONDE DE CASTAING, MORPHOLOGIE EN MICROSCOPIE ELECTRONIQUE A BALAYAGE ET A TRANSMISSION EN FONCTION DES CONDITIONS DE DEPOT ET DE TRAITEMENTS THERMIQUES
Author: Mohaidine Abani
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
DES COUCHES MINCES D'ITO (OXYDE D'INDIUM ET D'ETAIN) ET DE MOSE::(2) ONT ETE PREPAREES PAR PULVERISATION RF MAGNETRON POUR APPLICATIONS DANS LE DOMAINE DE L'ELECTROOPTIQUE ET DE LA CONVERSION DE L'ENERGIE PHOTOELECTROCHIMIQUE DE L'ENERGIE SOLAIRE. ETUDE DE L'INFLUENCE DES CONDITIONS DE PREPARATION ET DE TRAITEMENTS THERMIQUES SUR LES PROPRIETES OPTIQUES, ELECTRIQUES ET PHOTOELECTROCHIMIQUES DE CES COUCHES. CARACTERISATION PHYSICOCHIMIQUE DES FILMS (STRUCTURE ET TAUX DE CRISTALLISATION EN DIFFRACTION X, COMPOSITION EN MICROANALYSE NUCLEAIRE (RBS, PIXE) ET SONDE DE CASTAING, MORPHOLOGIE EN MICROSCOPIE ELECTRONIQUE A BALAYAGE ET A TRANSMISSION EN FONCTION DES CONDITIONS DE DEPOT ET DE TRAITEMENTS THERMIQUES
Author: Rafik Boughalmi
Publisher: Academiques
ISBN: 9783841639776
Category :
Languages : fr
Pages : 132
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Book Description
Ce travail resume l'elaboration et l'etude des couches minces binaires sulfurees d'Ag2S de Sb2S3 et de NiS. L'analyse par diffraction des rayons X montre que les couches elaborees sont polycristallines. L'etude optique de ces couches revele que le materiau Ag2S presente une transition directe avec une largeur de bande interdite de l'ordre de 2,34 eV et une transition indirecte avec un gap egal a 0,98 eV, tandis-que ceux de Sb2S3 et NiS presentent des transitions directes avec des energies de bande interdite egales respectivement a 1,72 et 0,53 eV. L'etude electrique des couches d'Ag2S de Sb2S3 et de NiS montre que la conduction dans le premier est ionique alors qu'elle est polaronique pour le second selon le modele CBH et qu'elle est metallique pour la couche de NiS. Par ailleurs, ce travail est annexe par une etude bibliographique sur les mecanismes de conduction electriques dans les solides. Enfin, ces couches trouvent leur application dans des domaines de detection des gaz, de rayonnement et de conversion photovoltaique.
Author: A.. BARRIERE
Publisher:
ISBN:
Category :
Languages : fr
Pages : 47
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Book Description
LES ETUDES PRESENTEES (ABSORPTION OPTIQUE, STIMULATIONS THERMIQUES, SEUIL PHOTOELECTRIQUE) LIEES A UN CONTROLE RIGOUREUX DES CONDITIONS DE PREPARATION DE COUCHES MINCES ISOLANTES (MGF::(2), ALF::(3), PB::(2)NB::(2)O::(7) ET DES DERIVES) ONT UN DOUBLE BUT: 1**(0)) RECHERCHER L'INFLUENCE DE L'ETAT CRISTALLOGRAPHIQUE ET DE LA COMPOSITION DE CES MATERIAUX SUR LA REPARTITION DES ETATS ELECTRONIQUES DANS LEUR BANDE INTERDITE. 2) DEDUIRE DE CES RESULTATS UNE INTERPRETATION DES MECANISMES DE CONDUCTION OBSERVES.
Author: Santo Martinuzzi
Publisher:
ISBN:
Category :
Languages : fr
Pages : 121
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Book Description
Author:
Publisher:
ISBN:
Category : Fluids
Languages : en
Pages : 836
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Book Description
Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659
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Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author: M.O. Manasreh
Publisher: Elsevier
ISBN: 0080534449
Category : Science
Languages : en
Pages : 463
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Book Description
Research advances in III-nitride semiconductor materials and device have led to an exponential increase in activity directed towards electronic and optoelectronic applications. There is also great scientific interest in this class of materials because they appear to form the first semiconductor system in which extended defects do not severely affect the optical properties of devices. The volume consists of chapters written by a number of leading researchers in nitride materials and device technology with the emphasis on the dopants incorporations, impurities identifications, defects engineering, defects characterization, ion implantation, irradiation-induced defects, residual stress, structural defects and phonon confinement. This unique volume provides a comprehensive review and introduction of defects and structural properties of GaN and related compounds for newcomers to the field and stimulus to further advances for experienced researchers. Given the current level of interest and research activity directed towards nitride materials and devices, the publication of the volume is particularly timely. Early pioneering work by Pankove and co-workers in the 1970s yielded a metal-insulator-semiconductor GaN light-emitting diode (LED), but the difficulty of producing p-type GaN precluded much further effort. The current level of activity in nitride semiconductors was inspired largely by the results of Akasaki and co-workers and of Nakamura and co-workers in the late 1980s and early 1990s in the development of p-type doping in GaN and the demonstration of nitride-based LEDs at visible wavelengths. These advances were followed by the successful fabrication and commercialization of nitride blue laser diodes by Nakamura et al at Nichia. The chapters contained in this volume constitutes a mere sampling of the broad range of research on nitride semiconductor materials and defect issues currently being pursued in academic, government, and industrial laboratories worldwide.
Author: Guglielmo Lanzani
Publisher: John Wiley & Sons
ISBN: 3527607390
Category : Science
Languages : en
Pages : 600
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Book Description
Carbon based pi-conjugated materials offer a broad range of applications, going from molecular electronics and single molecule devices to nanotechnology, plastic electronics and optoelectronics. The proper physical description of such materials is in between that of molecular solids and that of low-dimensional covalent semiconductors. This book is a comprehensive review of their elementary excitations processes and dynamics, which merges the two viewpoints, sometimes very different if not contrasting. In each chapter, a broad tutorial introduction provides a solid physical background to the topic, which is further discussed based on recent experimental results obtained via state-of-the-art techniques. Both the molecular, intra-chain character and the solid state, inter-molecular physics is addressed. Reports on single molecule and single polymer chain spectroscopy introduce the on-site phenomena. Several chapters are dedicated to nano-probes, steady state and transient spectroscopies. The highly ordered state, occurring in single crystals, is also discussed thoroughly. Finally, less conventional tools such as THz spectroscopy are discussed in detail. The book provides a useful introduction to the field for newcomers, and a valid reference for experienced researchers in the field.
Author: Agnes Buka
Publisher: World Scientific
ISBN: 1848167997
Category : Science
Languages : en
Pages : 299
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Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
