Synthèse de nanostructure d’Oxyde de Zinc par Electrodeposition: Troisième génération des cellules solaires basées sur des réseaux de nanofils et de nanotubes … par voie électrochimique

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Le but de cette thèse a été de fabriquer des réseaux de nanofils et de nanotubes de l?oxyde de zinc (ZnO) de dimensions contrôlées en utilisant la méthode de réduction électrochimique de l?oxygène moléculaire. Plusieurs approches concernant le contrôle des dimensions de ces nanofils ont été investiguées. Après l?étude du mécanisme de formation des nanofils, nous avons proposé une nouvelle méthode pour obtenir des réseaux de nanotubes de ZnO par dissolution des coeurs des nanofils. Les propriétés optiques, électriques et structurales des nanofils et des nanotubes de différentes dimensions, obtenus avec différents conditions de dépôt ont été étudiées dans cette thèse. Finalement, des cellules ETA, constituées de ZnO/CdSe/CuSCN, ont été étudiées en utilisant les réseaux obtenus. Les effets de la morphologie et des dimensions des nanofils et nanotubes sur la diffusion de la lumière et la performance électronique des dispositifs ont été étudiés. Cela nous a permis de mieux comprendre les mécanismes optiques et électroniques impliqués dans ce type de cellule solaire ouvrant de nombreuses possibilités pour améliorer leur performance.

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Joining Processes: An Introduction

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Joining Processes An Introduction David Brandon and Wayne D. Kaplan Technion, Israel Institute of Technology, Israel This is an introductory text for students of materials science and engineering interested in the scientific background to the joining and assembly of components in engineering systems. The principles of joining and the common methods employed to achieve a reliable joint are covered in chapters that all conclude with a summary of the points covered, and a set of problems for individual study, or class discussion. In the first chapters, thorough introductory overviews are given of firstly, the mechanical, chemical and physical phenomena related to surfaces, contacts and joins. In subsequent chapters, any necessary metallurgical or chemical background is adequately covered to enable students to understand the basic principles of a variety of joining methods, microelectronic devices and vacuum assemblies. Contents: Introduction; Surface Science; The Mechanics of Joining; Mechanical Bonding; Welding; Weld Metallurgy; Soldering and Brazing; Metal-ceramic Joints and Diffusion Bonding; Adhesives; Vacuum Seals; Micro-electronic Packaging.

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Physics at Surfaces and Interfaces: Proceedings of the International Conference Puri, India 4 – 8 March 2002

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This book contains articles in several areas involving a dominant role of surfaces and interfaces. It is divided into four sections. The first section deals with theoretical and experimental aspects of the structure and morphology of clean surfaces and adsorbed layers on surfaces. The next section concerns growth on surfaces leading to semiconductor devices with quantum well, quantum wire and quantum dot structures; also deals with spin transport in 2DEG. Section 3 is on layered synthetic microstructures (LSMs). Analysis of interface roughness and layer composition of LSMs by X-ray techniques, fabrication of hard X-ray telescopes with LSMs, and diffusion across interfaces of LSMs are discussed here. The last section contains articles dealing with semiconductor surfaces exposed to ion beams and ion-irradiated semiconductor multilayers.

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Grain Boundary Diffusion and Properties of Nanostructured Materials

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Surfaces and Interfaces in Nanostructured Materials and Trends in LIGA, Miniaturization, and Nanoscale Materials: Fifth MPMD Global Innovations Symposium

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This volume combines the proceedings of two prominent symposia presented by TMS’s Materials Processing and Manufacturing Division (MPMD).

Papers from the Surfaces and Interfaces in Nanostructured Materials Symposium bring together experts working on different aspects of study, such as fabrication, characterization, modification, and modeling, to identify and address important issues, such as structure-chemistry-property relationships; surface engineering approaches in the nanoscale regime; chemistry and atomic bonding at interfaces; kinetics, diffusion paths, and related effects at interfaces; fabrication of “bulk” nanostructures; and advances in interfacial modification/engineering techniques.

Proceedings from the Global Innovations Symposium on Materials Processing and Manufacturing: Trends in LIGA, Miniaturization, and Nanoscale Materials, the fifth in a series sponsored by the MPMD, provide description, insight, challenges, and projections for advances in miniaturized part manufacturing, evaluation, and applications. This collection provides a visionary look to where investments in materials research are likely to occur and what areas in materials R&D are ripe for discoveries that will have major impact on quality of life.

From 2004 TMS Annual Meeting which was held in Charlotte, North Carolina, March 14-18, 2004.

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