Download or read book Transistors en couches minces de silicium microcristallin fabriqu s T written by Khaled Amir Belarbi and published by . This book was released on 2010 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: e travail de thèse porte sur la réalisation de transistors en couches minces (Thin film transistors) de silicium microcristallin fabriqués à une température inférieure à 180°C. Cette thèse permet d’envisager diverses applications allant de la technologie des écrans OLED jusqu’à l’électronique flexible associée au textile intelligent. Pour le bon fonctionnement de ces applications, il est nécessaire de produire des transistors performants. C’est pourquoi ces travaux de thèse visent la fabrication de transistors respectant les conditions pour un bon fonctionnement des applications attendues, c'est-à-dire une dualité mobilité-stabilité satisfaisante. Les premiers transistors en structure « Top-Gate » utilisant l’oxyde de silicium comme isolant de grille ont abouti à d’excellentes performances (40 cm2/Vs). Ces derniers s’avérèrent ne pas être fiable en terme de stabilité. Beaucoup de questions se sont alors posées pour remédier à cette instabilité. Des techniques telles que les mesures électriques (énergie d’activation de la conductivité) et physiques (SIMS) ont permis de comprendre d’où venait le problème. Il s’avère que lors du dépôt de l’isolant, une importante incorporation d’oxygène pénètre dans la structure colonnaire du silicium microcristallin. La première solution consistait donc à utiliser une couche fine de silicium microcristallin. Les transistors ainsi fabriqués ne dérivent que faiblement. La deuxième solution consistait à l’élaboration d’un isolant autre que l’oxygène lors du dépôt. Par le biais du nitrure de silicium, les transistors en structure « Top-Gate » de type N montrent une mobilité de (2 cm2/Vs) et une bonne stabilité. Enfin, des transistors de type P ont été également fabriqués rendant possible la mise au point d’une technologie de type CMOS avec le silicium microcristallin.
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Download or read book Yvain written by Chretien de Troyes and published by Yale University Press. This book was released on 1987-09-10 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: A twelfth-century poem by the creator of the Arthurian romance describes the courageous exploits and triumphs of a brave lord who tries to win back his deserted wife's love
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Download or read book Hyena Family written by Jane Goodall and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: British naturalist Jane Goodall provides an intimate portrait of a group of hyenas.
Download or read book Charles Pettigrew First Bishop elect of the North Carolina Episcopal Church written by Bennett H Wall and published by Hassell Street Press. This book was released on 2021-09-10 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Aristotle 384 BC 322 BC written by Subrata Mukherjee and published by Deep and Deep Publications. This book was released on 1994 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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