Sputter-deposition of Epitaxial CdTe and PbTe Layers PDF Download
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Author: Mohamed-Samir Aouadi
Publisher:
ISBN:
Category : Plasma spectroscopy
Languages : en
Pages : 228
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Book Description
Author: Mohamed-Samir Aouadi
Publisher:
ISBN:
Category : Plasma spectroscopy
Languages : en
Pages : 228
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Book Description
Author: Goutam Mukherjee
Publisher:
ISBN:
Category : Magnetrons
Languages : en
Pages : 166
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Book Description
Hall measurements on sputter-deposited epitaxial PbTe films have confirmed that samples prepared at high growth temperatures are n-type and those grown at low substrate temperatures are p-type, irrespective of the substrate bias applied during growth. The low temperature mobility values in the sputter-deposited samples are found to be limited by a temperature-independent neutral impurity scattering mechanism. One of the features of heteroepitaxial growth is the existence of a large density of structural defects at the interface due to lattice mismatch. (Abstract shortened by UMI.).
Author: Goutam Mukherjee
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Sputter-deposited heteroepitaxial layers of (100) CdTe $\Vert$ (100) KBr prepared at growth temperatures of 300-325$\sp\circ$C are found to be p-type with high dark resistivities on the order of 2 $\times$ 10$\sp5$ ohm-cm. The epilayers are highly photoconducting. The photoconductivity $\sigma\sb{ph}$ (expressed as $\sigma\sb{ph} \propto f\sp{\gamma}$) is observed to exhibit a sublinear ($\gamma$ $\prec$ 1) dependence on illumination intensity f. Photo-Hall effect measurements show that the photoconductivity is due to change in carrier concentration and not due to any enhancement in the carrier mobility. Moreover, the photocurrent is carried by holes. Hall measurements on sputter-deposited epitaxial PbTe films have confirmed that samples prepared at high growth temperatures are n-type and those grown at low substrate temperatures are p-type, irrespective of the substrate bias applied during growth. The low temperature mobility values in the sputter-deposited samples are found to be limited by a temperature-independent neutral impurity scattering mechanism. One of the features of heteroepitaxial growth is the existence of a large density of structural defects at the interface due to lattice mismatch. (Abstract shortened by UMI.).
Author: J Matthews
Publisher: Elsevier
ISBN: 0323152120
Category : Science
Languages : en
Pages : 401
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Book Description
Epitaxial Growth, Part A is a compilation of review articles that describe various aspects of the growth of single-crystal films on single-crystal substrates. The collection contains topics on the historical development of epitaxy, the nucleation of thin films, the structure of the interface between film and substrate, and the generation of defects during film growth. The text also provides descriptions of the methods used to prepare and examine thin films and a list of the overgrowth-substrate combinations studied. Mineralogists, materials engineers and scientists, and physicists will find this book a great source of insight.
Author: E.I. Givargizov
Publisher: Springer Science & Business Media
ISBN: 146153268X
Category : Science
Languages : en
Pages : 208
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Book Description
This 18th volume of the series includes invited papers from the Seventh All-Union Conference on the Growth of Crystals and the Symposium on Molecular-Beam Epitaxy that were held in Moscow in November, 1988. In choosing papers, the Program Committee of the conference gave priority to studies in rapidly emerging areas of the growth and preparation of crystalS and crystalline films. The qualifications of the authors were also consid ered. This ensured that the material was of a high standard and that the problems discussed covered a wide range. These are the same criteria that, we hope, are typical of the volumes of this series. The articles of the present volume are divided into four sections: I. Processes on the growth surface. II. Molecular-beam epitaxy. III. Growth of crystals and films from solutions and fluxes. N. Growth of crystals from the melt. Following tradition, the series opens with three theoretical articles. These examine problems applicable to various crystallization media: instability of the crystallization front (for a more general case than before and for a comparatively complicated system, a solution), adsorption and migration of atoms and molecules (the analysis is made on a quantum-chemical level), and the kinetics of step and dislocation growth in the presence of surface anisotropy as well as impurity adsorption (several earlier known methods are summarized). The next two articles are experimental and methodical.
Author:
Publisher:
ISBN:
Category : Narrow gap semiconductors
Languages : en
Pages : 374
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Author: Sougata Ghosh
Publisher: Woodhead Publishing
ISBN: 0323999360
Category : Technology & Engineering
Languages : en
Pages : 526
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Book Description
Agricultural Nanobiotechnology: Biogenic Nanoparticles, Nanofertilizers and Nanoscale Biocontrol Agents presents the most up-to-date advances in nanotechnology to improve the agriculture and food industry with novel nanotools for the controlling of rapid disease diagnostic and enhancement of the capacity of plants to absorb nutrients and resist environmental challenges. Highlighting the emerging nanofertilizers, nanopesticides and nanoherbicides that are being widely explored in order to overcome the limitations of conventional agricultural supplements, the book provides important insights to enable smart, knowledge-driven selection of nanoscale agricultural biomaterials, coupled with suitable delivery approaches and formulations will lead to promising agricultural innovation using nanotechnology. Agricultural Nanobiotechnology: Biogenic Nanoparticles, Nanofertilizers and Nanoscale Biocontrol Agents explores emerging innovations in nanobiotechnology for agriculture, food, and natural resources to address the challenges of food security, sustainability, susceptibility, human health, and healthy life. The book is ideal for the multidisciplinary scientists whose goal is to see the use of nanomaterials in agriculture to reduce the amount of spread chemicals, minimize nutrient losses in fertilization and to generate increased yield through pest and nutrient management. - Includes mechanisms of plant-metal interaction and green synthesis - Explores the fabrication of nanostructures including carbon nanotubes, quantum dots, encapsulation and emulsions - Presents agriculturally focused application insights including nanofertilizers, nanopesticides, and nanoherbicides
Author: John Wauchope Matthews
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 404
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Book Description
Epitaxial Growth Part A ...
Author: Alvin D. Compaan
Publisher:
ISBN:
Category : Photovoltaic cells
Languages : en
Pages : 71
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Book Description
The three overall emphases of this subcontract were the following: 1) improving our understanding of key aspects of CdS/CdTe solar cell device physics, 2) improving our understanding of magnetron sputtering and increasing the sputter deposition rate while maintaining high device quality, and 3) reducing the thickness of CdTe layers in the CdS/CdTe cell below 0.5 micronm while maintaining voltage and fill factor.
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1192
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Book Description
