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Book Description
La redistribution du bore (implantation après dépôt) et du phosphore (dopage in situ pendant le dépôt) a été étudiée lors de la cristallisation d'une couche submicronique de silicium amorphe déposée par LPCVD (Low Pressure Chemical Vapor Déposition). Les traitements thermiques de cristallisation ont été effectués sous vide et dans une gamme de température allant de 450 à 800°C. La cinétique de cristallisation est accélérée en présence de bore (B) et de phosphore (P). Pendant les traitements thermiques, le B est redistribué dans la couche de manière significative, avant et après cristallisation totale. La présence de P ralentit la cinétique de redistribution du B quelle que soit la température du recuit. Pour les traitements thermiques à haute température, bien que la distribution initiale du P avant recuit soit homogène dans toute la couche, le P migre vers les zones fortement concentrées en B. Le matériau étudié constitue la grille flottante d'une mémoire non volatile de type EEPROM.
Book Description
La redistribution du bore (implantation après dépôt) et du phosphore (dopage in situ pendant le dépôt) a été étudiée lors de la cristallisation d'une couche submicronique de silicium amorphe déposée par LPCVD (Low Pressure Chemical Vapor Déposition). Les traitements thermiques de cristallisation ont été effectués sous vide et dans une gamme de température allant de 450 à 800°C. La cinétique de cristallisation est accélérée en présence de bore (B) et de phosphore (P). Pendant les traitements thermiques, le B est redistribué dans la couche de manière significative, avant et après cristallisation totale. La présence de P ralentit la cinétique de redistribution du B quelle que soit la température du recuit. Pour les traitements thermiques à haute température, bien que la distribution initiale du P avant recuit soit homogène dans toute la couche, le P migre vers les zones fortement concentrées en B. Le matériau étudié constitue la grille flottante d'une mémoire non volatile de type EEPROM.
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
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: Jef Poortmans Publisher: John Wiley & Sons ISBN: 0470091266 Category : Science Languages : en Pages : 504
Book Description
Thin-film solar cells are either emerging or about to emerge from the research laboratory to become commercially available devices finding practical various applications. Currently no textbook outlining the basic theoretical background, methods of fabrication and applications currently exist. Thus, this book aims to present for the first time an in-depth overview of this topic covering a broad range of thin-film solar cell technologies including both organic and inorganic materials, presented in a systematic fashion, by the scientific leaders in the respective domains. It covers a broad range of related topics, from physical principles to design, fabrication, characterization, and applications of novel photovoltaic devices.
Author: John Wilfred Orton Publisher: ISBN: 0199695822 Category : Science Languages : en Pages : 529
Book Description
The book is a history of Molecular Beam Epitaxy (MBE) as applied to the growth of semiconductor thin films (note that it does not cover the subject of metal thin films). It begins by examining the origins of MBE, first of all looking at the nature of molecular beams and considering their application to fundamental physics, to the development of nuclear magnetic resonance and to the invention of the microwave MASER. It shows how molecular beams of silane (SiH4) were used to study the nucleation of silicon films on a silicon substrate and how such studies were extended to compound semiconductors such as GaAs. From such surface studies in ultra-high vacuum the technique developed into a method of growing high quality single crystal films of a wide range of semiconductors. Comparing this with earlier evaporation methods of deposition and with other epitaxial deposition methods such as liquid phase and vapour phase epitaxy (LPE and VPE). The text describes the development of MBE machines from the early 'home-made' variety to that of commercial equipment and show how MBE was gradually refined to produce high quality films with atomic dimensions. This was much aided by the use of various in-situ surface analysis techniques, such as reflection high energy electron diffraction (RHEED) and mass spectrometry, a feature unique to MBE. It looks at various modified versions of the basic MBE process, then proceed to describe their application to the growth of so-called 'low-dimensional structures' (LDS) based on ultra-thin heterostructure films with thickness of order a few molecular monolayers. Further chapters cover the growth of a wide range of different compounds and describe their application to fundamental physics and to the fabrication of electronic and opto-electronic devices. The authors study the historical development of all these aspects and emphasise both the (often unexpected) manner of their discovery and development and the unique features which MBE brings to the growth of extremely complex structures with monolayer accuracy.
Author: Jean-Louis Barrat Publisher: Cambridge University Press ISBN: 9780521789530 Category : Science Languages : en Pages : 410
Book Description
Presenting a unified approach, this book focusses on the concepts and theoretical methods that are necessary for an understanding of the physics and chemistry of the fluid state. The authors do not attempt to cover the whole field in an encyclopedic manner. Instead, important ideas are presented in a concise and rigorous style, and illustrated with examples from both simple molecular liquids and more complex soft condensed matter systems such as polymers, colloids, and liquid crystals.
Author: Martin A. Green Publisher: Trans Tech Publications Ltd ISBN: 3035739641 Category : Technology & Engineering Languages : en Pages : 240
Book Description
The early chapters comprehensively review the optical and transport properties of silicon. Light trapping is described in detail. Limits on the efficiency of silicon cells are discussed as well as material requirements necessary to approach these limits. The status of current approaches to passifying surfaces, contacts and bulk regions is reviewed. The final section of the book describes the most practical approaches to the fabrication of high-efficiency cells capable of meeting the efficiency targets for both concentrated and non-concentrated sunlight, including a discussion of design and processing approaches for non-crystalline silicon.
Author: Roberto Simola
Author: Roberto Simola
Author: G. Willeke
Author: 
Author: Ahmed Belasri
Author: Jef Poortmans
Author: 
Author: John Wilfred Orton
Author: Maria Virginia Stangoni
Author: Jean-Louis Barrat
Author: Martin A. Green