Download or read book Structural and Electrical Characterization of Cu based Delafossites written by Nathan Andrew Ashmore and published by . This book was released on 2004 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: CuGaO2 is a p-type conducting transparent oxide with the delafossite structure. Considerable interest has been garnered in this field upon the creation of transparent pn junctions using delafossite materials. In order for CuGaO2 to be considered a candidate in transparent devices, the conductivity of this compound must be first increased. It has been suggested that Cu vacancies (V[Subscript Cu]') or interstitial oxygens (O[Subscript i]'') may be the primary conduction mechanisms within CuGaO2. This study demonstrates the effects of non-stoichiometric batching and oxygen annealing of this compound. Structural data will be presented through the use of x-ray diffraction, transmission electron microscopy, and scanning electron microscopy. Electrical characterization will be made using ac impedance spectroscopy and conductivity versus time and temperature graphs. Non-stoichiometric compositions ranging from Cu0[Subscript .]95GaO2 to Cu1[Subscript .]05GaO2 were produced using solid-state synthesis. Conductivity and activation energy measurements do not show an appreciable change in either with respect to non-stoichiometry. X-ray diffraction data shows a solubility limit from Cu0[Subscript .]9GaO2 to Cu1[Subscript .]02GaO2 after which both the a and c lattice parameters show a marked decrease in length. This decrease is accompanied by the formation of Ga2O3 with the Cu-deficient compounds. O2 annealed samples were prepared by annealing stoichiometric CuGaO2 in flowing 100% O2 atmosphere at 400°C, 450°C, 500°C, and 600°C for 12 hours, as well as one sample annealed at 400°C for 100 hours. In-site isothermal resistivity versus time measurements were also performed at 450°C and 500°C. Electrical data show a marked increase in resistivity with annealing time and temperatures, while x-ray diffraction results show an increased decomposition from CuGaO2 to CuGa2O4, CuO, and Ga2O3. The in-situ resistivity versus time data do not show evidence of oxygen intercalation before the decomposition reactions begin.
Download or read book Commencement written by Iowa State University and published by . This book was released on 2004 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cu based Transparent Conducting Oxides Based on the Delafossite Structure written by Robert Bruce Gall and published by . This book was released on 2003 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently Cu-based transparent conducting delafossite compounds have been found to exhibit p-type conductivity either intrinsically or through various doping schemes. The development of a single oxide compound which can be effectively doped both n- and p-type would make a number of interesting transparent devices a reality. In this work, bipolar doping schemes were investigated for polycrystalline CuGaO2 ceramics through aliovalent cation substitutions on the B-site. Dense, single-phase polycrystalline ceramics were synthesized by solid state reaction through controlling the oxygen partial pressure and quenching to room temperature. The high temperature phase equilibria as a function of oxygen partial pressure was examined through x-ray powder diffraction. These results were compared with thermodynamic calculations of the stability of phases in the Cu-Ga-O system. Electrical measurements were then performed in order verify the carrier type, carrier concentration, and conductivity. Finally, optical measurements were made to establish the optical band gap and transmission window.
Download or read book Master s Theses Directories written by and published by . This book was released on 2005 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Download or read book Bibliography written by Pierre Villars and published by Walter de Gruyter. This book was released on 2012-12-21 with total page 1827 pages. Available in PDF, EPUB and Kindle. Book excerpt: By browsing about 10 000 000 scientific articles of over 200 major journals mainly in a 'cover to cover approach' some 200 000 publications were selected. The extracted data is part of the following fundamental material research fields: crystal structures (S), phase diagrams (also called constitution) (C) and the comprehensive field of intrinsic physical properties (P). This work has been done systematically starting with the literature going back to 1900. The above mentioned research field codes (S, C, P) as well as the chemical systems investigated in each publication were included in the present work. The aim of the Inorganic Substances Bibliography is to provide researchers with a comprehensive compilation of all up to now published scientific publications on inorganic systems in only three handy volumes.
Download or read book Coatings to Improve Optoelectronic Devices written by Selected Articles Published by MDPI and published by MDPI. This book was released on 2020-04-09 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This selection is focused on coatings and films with applications in optoelectronics, such as photovoltaics, photocatalysis, and light-based sensors and phenomena. The studies investigate the optimal composition, crystalline structure, and morphology to deliver the different functionalities sought. Obtaining transparent p-type electrodes is challenging but extremely relevant in optoelectronics. Electric conduction mechanisms and the correlations with structure and doping are discussed. The important issue of the degradation pathways in perovskite-based solar cells and the possibilities offered by different types of coatings to encapsulate the devices as well as the beneficial effect of silica coating as an antireflection and antisoiling layer on well-established solar cells are discussed. New designs of nanoplasmonic films for chemical and biological molecule sensing are reviewed, such as the combination of metallic nanoparticles and nanostructured semiconductors and dispersing metallic or bi-metallic nanoparticles in CuO films. The impacts of structure, defects, and morphology on the photoactivated properties of WO3 films and on the shape memory behavior in Cu–Al–Ni thin films are discussed. Aggregated TiO2 nanoparticles on TiO2 layers are shown to enhance optical transmittance and confer a superhydrophilic characteristic. Finally, aspects of the fundamental characterization of thin films, Drude damping in thin films, and laser-induced deflection technique are discussed.
Download or read book Handbook of Transparent Conductors written by David S. Ginley and published by Springer Science & Business Media. This book was released on 2010-09-11 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transparent conducting materials are key elements in a wide variety of current technologies including flat panel displays, photovoltaics, organic, low-e windows and electrochromics. The needs for new and improved materials is pressing, because the existing materials do not have the performance levels to meet the ever- increasing demand, and because some of the current materials used may not be viable in the future. In addition, the field of transparent conductors has gone through dramatic changes in the last 5-7 years with new materials being identified, new applications and new people in the field. “Handbook of Transparent Conductors” presents transparent conductors in a historical perspective, provides current applications as well as insights into the future of the devices. It is a comprehensive reference, and represents the most current resource on the subject.
Download or read book Reactive Sputter Deposition written by Diederik Depla and published by Springer Science & Business Media. This book was released on 2008-06-24 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this valuable work, all aspects of the reactive magnetron sputtering process, from the discharge up to the resulting thin film growth, are described in detail, allowing the reader to understand the complete process. Hence, this book gives necessary information for those who want to start with reactive magnetron sputtering, understand and investigate the technique, control their sputtering process and tune their existing process, obtaining the desired thin films.
Download or read book Metals Abstracts written by and published by . This book was released on 1997 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multifunctional Oxide Heterostructures written by Evgeny Y. Tsymbal and published by OUP Oxford. This book was released on 2012-08-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the rapidly developing field of oxide thin-films and heterostructures. Oxide materials combined with atomic-scale precision in a heterostructure exhibit an abundance of macroscopic physical properties involving the strong coupling between the electronic, spin, and structural degrees of freedom, and the interplay between magnetism, ferroelectricity, and conductivity. Recent advances in thin-film deposition and characterization techniques made possible the experimental realization of such oxide heterostructures, promising novel functionalities and device concepts. The book consists of chapters on some of the key innovations in the field over recent years, including strongly correlated oxide heterostructures, magnetoelectric coupling and multiferroic materials, thermoelectric phenomena, and two-dimensional electron gases at oxide interfaces. The book covers the core principles, describes experimental approaches to fabricate and characterize oxide heterostructures, demonstrates new functional properties of these materials, and provides an overview of novel applications.
Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Inorganic Materials Design written by John N. Lalena and published by John Wiley & Sons. This book was released on 2005-05-13 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique interdisciplinary approach to inorganic materialsdesign Textbooks intended for the training of chemists in the inorganicmaterials field often omit many relevant topics. With itsinterdisciplinary approach, this book fills that gap by presentingconcepts from chemistry, physics, materials science, metallurgy,and ceramics in a unified treatment targeted towards the chemistryaudience. Semiconductors, metal alloys and intermetallics, as wellas ceramic substances are covered. Accordingly, the book shouldalso be useful to students and working professionals in a varietyof other disciplines. This book discusses a number of topics that are pertinent to thedesign of new inorganic materials but are typically not covered instandard solid-state chemistry books. The authors start with anintroduction to structure at the mesoscopic level and progress tosmaller-length scales. Next, detailed consideration is given toboth phenomenological and atomistic-level descriptions of transportproperties, the metal-nonmetal transition, magnetic and dielectricproperties, optical properties, and mechanical properties. Finally,the authors present introductions to phase equilibria, synthesis,and nanomaterials. Other features include: * Worked examples demonstrating concepts unfamiliar to thechemist * Extensive references to related literature, leading readers tomore in-depth coverage of particular topics * Biographies introducing the reader to great contributors to thefield of inorganic materials science in the twentieth century With their interdisciplinary approach, the authors have set thegroundwork for communication and understanding among professionalsin varied disciplines who are involved with inorganic materialsengineering. Armed with this publication, students and researchersin inorganic and physical chemistry, physics, materials science,and engineering will be better equipped to face today's complexdesign challenges. This textbook is appropriate for senior-levelundergraduate and graduate course work.
Download or read book Layered Double Hydroxides written by Vicente Rives and published by Nova Publishers. This book was released on 2001 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Layered double hydroxides are one of the variety of names given to a family of layered materials first discovered in Sweden in 1842. These materials are interesting because their layer cations can be changed among a wide selection, and the interlayer anion can also be (nearly) freely chosen. Like cationic clays, they can be pillared and can exchange interlayer species -- thus increasing applications and making new routes to derivatives. The principle areas of application include catalyst support, anion scavengers, polymer stabilisers, and antacids. In the last several years, reviews and studies of LDHs have dealt with these uses. This book aims to update the current body of LDH knowledge from a wide array of views. The first section addresses the synthesis and physiochemical characterisation of these materials, and section two focuses on the applications of LDHs.
Download or read book Chemical Solution Deposition of Functional Oxide Thin Films written by Theodor Schneller and published by Springer Science & Business Media. This book was released on 2014-01-24 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first text to cover all aspects of solution processed functional oxide thin-films. Chemical Solution Deposition (CSD) comprises all solution based thin- film deposition techniques, which involve chemical reactions of precursors during the formation of the oxide films, i. e. sol-gel type routes, metallo-organic decomposition routes, hybrid routes, etc. While the development of sol-gel type processes for optical coatings on glass by silicon dioxide and titanium dioxide dates from the mid-20th century, the first CSD derived electronic oxide thin films, such as lead zirconate titanate, were prepared in the 1980’s. Since then CSD has emerged as a highly flexible and cost-effective technique for the fabrication of a very wide variety of functional oxide thin films. Application areas include, for example, integrated dielectric capacitors, ferroelectric random access memories, pyroelectric infrared detectors, piezoelectric micro-electromechanical systems, antireflective coatings, optical filters, conducting-, transparent conducting-, and superconducting layers, luminescent coatings, gas sensors, thin film solid-oxide fuel cells, and photoelectrocatalytic solar cells. In the appendix detailed “cooking recipes” for selected material systems are offered.
Download or read book Oxide Electronics written by Asim K. Ray and published by John Wiley & Sons. This book was released on 2021-04-12 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide Electronics Multiple disciplines converge in this insightful exploration of complex metal oxides and their functions and properties Oxide Electronics delivers a broad and comprehensive exploration of complex metal oxides designed to meet the multidisciplinary needs of electrical and electronic engineers, physicists, and material scientists. The distinguished author eschews complex mathematics whenever possible and focuses on the physical and functional properties of metal oxides in each chapter. Each of the sixteen chapters featured within the book begins with an abstract and an introduction to the topic, clear explanations are presented with graphical illustrations and relevant equations throughout the book. Numerous supporting references are included, and each chapter is self-contained, making them perfect for use both as a reference and as study material. Readers will learn how and why the field of oxide electronics is a key area of research and exploitation in materials science, electrical engineering, and semiconductor physics. The book encompasses every application area where the functional and electronic properties of various genres of oxides are exploited. Readers will also learn from topics like: Thorough discussions of High-k gate oxide for silicon heterostructure MOSFET devices and semiconductor-dielectric interfaces An exploration of printable high-mobility transparent amorphous oxide semiconductors Treatments of graphene oxide electronics, magnetic oxides, ferroelectric oxides, and materials for spin electronics Examinations of the calcium aluminate binary compound, perovoksites for photovoltaics, and oxide 2Degs Analyses of various applications for oxide electronics, including data storage, microprocessors, biomedical devices, LCDs, photovoltaic cells, TFTs, and sensors Suitable for researchers in semiconductor technology or working in materials science, electrical engineering, and physics, Oxide Electronics will also earn a place in the libraries of private industry researchers like device engineers working on electronic applications of oxide electronics. Engineers working on photovoltaics, sensors, or consumer electronics will also benefit from this book.
Download or read book Photovoltaic Energy Program Contract Summary Fiscal Year 2000 written by and published by DIANE Publishing. This book was released on 2001 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxide Semiconductors Volume 1633 written by Steve Durbin and published by Materials Research Society. This book was released on 2014-07-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Symposium R, "Oxide Semiconductors" was held December 1-6 at the 2013 MRS Fall Meeting in Boston, Massachusetts. Oxide semiconductors are poised to take a more active role in modern electronics, particularly in the field of thin film transistors. While many advances have been made in terms of our understanding of fundamental optical and electronic characteristics, there remain many questions in terms of defects, doping, and optimal growth/synthesis conditions. This symposium proceedings volume represents recent advances in growth and characterization of a number of different oxide semiconductors, as well as device fabrication.
