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Book Chemically Deposited Nanocrystalline Metal Oxide Thin Films

Download or read book Chemically Deposited Nanocrystalline Metal Oxide Thin Films written by Fabian I. Ezema and published by Springer Nature. This book was released on 2021-06-26 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book guides beginners in the areas of thin film preparation, characterization, and device making, while providing insight into these areas for experts. As chemically deposited metal oxides are currently gaining attention in development of devices such as solar cells, supercapacitors, batteries, sensors, etc., the book illustrates how the chemical deposition route is emerging as a relatively inexpensive, simple, and convenient solution for large area deposition. The advancement in the nanostructured materials for the development of devices is fully discussed.

Book Microstructure of Nanocrystalline Undoped and Doped Cerium Oxide Thin Films and Their Electrical and Optical Properties

Download or read book Microstructure of Nanocrystalline Undoped and Doped Cerium Oxide Thin Films and Their Electrical and Optical Properties written by Toshio Suzuki and published by . This book was released on 2001 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Structural Studies of Nano Crystalline Metal Oxide Films

Download or read book Structural Studies of Nano Crystalline Metal Oxide Films written by Girjesh Singh and published by LAP Lambert Academic Publishing. This book was released on 2011-12 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present work deals with the investigation of Nanocrystalline semiconducting oxide thin films. We have particularly undertaken the investigation of undoped and Al, In and Co doped ZnO films. In the present work Zinc oxide films were fabricated by a homemade chemical spray pyrolysis system (CSPT) equipped with an optical set-up ensuring the in-situ control of the film growth. This CSPT has been found to be easy, inexpensive and well adapted for mass fabrication. A number of ZnO samples have been prepared by using different type of dopants having different dopant concentrations.The above prepared films have been characterized for their structural, morphological, electrical and optical properties as a function of doping concentrations and effect of change in dopants as well as doping concentrations on the physical and structural properties of ZnO films studied. In another piece of work, we have investigated the effect of ion implantation in Si particularly, the nature and concentration of defects by using positron annihilation techniques. . The results and findings of the above studies have been reported in the respective chapters.

Book Optical Properties of Metal Oxide Nanostructures

Download or read book Optical Properties of Metal Oxide Nanostructures written by Vijay Kumar and published by Springer Nature. This book was released on 2023-10-25 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the optical properties of metal oxides at both the fundamental and applied level and their use in various applications. The book offers a basic understanding of the optical properties and related spectroscopic techniques essential for anyone interested in learning about metal oxide nanostructures. This is partly due to the fact that optical properties are closely associated with other properties and functionalities (e.g., electronic, magnetic, and thermal), which are of essential significance to many technological applications, such as optical data communications, imaging, lighting, and displays, life sciences, health care, security, and safety. The book also highlights the fundamentals and systematic developments in various optical techniques to achieve better characterization, cost-effective, user-friendly approaches, and most importantly, state-of-the-art developing methodologies for various scientific and technological applications. It provides an adequate understanding of the imposed limitations and highlights the prospects and challenges associated with optical analytical methods to achieve the desired performance in targeted applications.

Book Optical and Structural Properties of Europium Doped Silicon Oxide Thin Films

Download or read book Optical and Structural Properties of Europium Doped Silicon Oxide Thin Films written by Rashin Basiri Namin and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rare earth doping is one of the main approaches to enhance the optical properties of silicon-based materials. In this work, a set of europium doped silicon oxide (Eu[subscript x]Si[subscript y]O[subscript z]) thin films are fabricated using an integrated magnetron sputtering electron cyclotron resonance plasma enhanced chemical vapor deposition (IMS-ECR-PECVD) system. The thin film composition was studied by Rutherford backscattering spectrometry (RBS) and elastic recoil detection (ERD) measurements verifying high control over the Eu content by changing the sputtering power. Variable Angle spectroscopic ellipsometry (VASE) was conducted, delivering the refractive index and thickness. Using a UV laser (325 nm) excitation source, Photoluminescence (PL) measurements were performed, and it was confirmed that Eu[superscript 3+] transition which is associated with the red light emission is successfully achieved even at annealing temperatures as low as 300°C. Performing X-ray diffraction (XRD) analysis, the structural properties of the thin films were studied and the formation of Eu[subscript x]Si[subscript y]O[subscript z] crystals was confirmed for the samples annealed at elevated temperatures.

Book Preparation and Post Annealing Effects on the Optical Properties of Indium Tin Oxide Thin Films

Download or read book Preparation and Post Annealing Effects on the Optical Properties of Indium Tin Oxide Thin Films written by Rongxin Wang and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Preparation and Post-annealing Effects on the Optical Properties of Indium Tin Oxide Thin Films" by Rongxin, Wang, 王榮新, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled PREPARATION AND POST-ANNEALING EFFECTS ON THE OPTICAL PROPERTIES OF INDIUM TIN OXIDE THIN FILMS Submitted by WANG Rong Xin for the degree of Doctor of Philosophy at The University of Hong Kong in April 2005 Many opto-electronic devices, such as III-V compound devices, liquid crystal displays, solar cells, organic and inorganic light emitting devices, and ultraviolet photodetectors, demand transparent electrode materials simultaneously having high electrical conductance. To meet the requirements for particular applications, a great deal of basic research and studies have been carried out on the electrical and optical properties of these materials. As a most promising candidate for such materials, indium tin oxide (ITO) has attracted interest in recent years. Furthermore, ITO has many unique properties such as excellent adhesion on the substrate, thermal stability and ease of patterning. The deposition of high-quality ITO thin films is a key step for successful application of ITO thin films as transparent electrode materials. To obtain optimal electrical and optical properties of ITO films, the growth parameters and conditions must be determined. Moreover, the optical and electrical properties of ITO contact layers, which can either be on the top side or the bottom side of a device, are influenced by various post-deposition treatments. For the present work, ITO thin films were deposited on glass and quartz substrates using e-beam evaporation with different deposition rates. The influence of substrate material, deposition rate, deposition gas environment and post-deposition annealing on the optical properties of the films was investigated in detail. Atomic force microscopy, X-ray diffraction and X-ray photoemission spectroscopy was employed to obtain information on the chemical state and crystallization of the films. Analysis of these data suggests that the substrate material, deposition rate, deposition gas environment and post-deposition annealing conditions strongly affect the chemical composition and the microstructure of the ITO films and these in turn influence the optical properties of the film. Oxygen incorporation transfers the In O phase to the In O phase and removes metallic In to form both indium oxide 2 3-x 2 3 phases. Both of these reactions are beneficial for the optical transmittance of ITO thin films. Moreover, it was found that the incorporation and decomposition reactions of oxygen can be controlled so as to change the optical properties of the ITO thin films reversibly. DOI: 10.5353/th_b3154617 Subjects: Thin films - Optical properties Indium compounds Annealing of metals

Book Electronic and Optical Properties of Oxide Thin Films

Download or read book Electronic and Optical Properties of Oxide Thin Films written by Steven Daniel Kirby and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Off-axis sputtering has been used to study two oxide thin film systems. The first study involved developing an epitaxially grown NiO/SrTiO3 heterostructure to be used for a negative index of refraction. The second used off-axis sputtering as a combinatorial approach to study the effects of doping and codoping of transparent conducting ZnO. A negative index of refraction should be possible by combining only intrinsic material resonances. We proposed that combining NiO, which has an antiferromagnetic resonance in the far infrared, and SrTiO3, which has a dielectric resonance in the far-infrared, can be used to achieve a negative refractive index of refraction in the far-infrared. These resonances can be shifted through changing temperature, doping, or through applying a magnetic field. A high quality epitaxially grown composite heterostructure and bulk ceramics have been fabricated. Preliminary measurements of the permeability and permittivity been taken for a bulk composite structure. The SrTiO3 ionic resonance can be seen in a reflection technique while the NiO antiferromagnetic resonance is easily seen in a transmission technique ZnO is a potential inexpensive replacement for indium tin oxide (ITO) as a high-end transparent conductor. However, ZnO has not replaced ITO in many applications such as flat-panel displays due to high resistivity and poor thermal stability. ZnO has been doped with many elements including Al, In and Ga. We proposed that codoping with both Al and In might result in size compensation which would lead to improved dopant solubility and therefore better electrical conductivity and stability. A high-throughput combinatorial approach was used to study codoping of ZnO with both Al and In. Measurement of the deposited composition spread suggests that codoping results in much improved conductivity. By adding 1% In to highly Al-doped ZnO (3-6%) the conductivity increases by an order of magnitude. Thermal annealing in a variety of atmospheres including air, vacuum and hydrogen results in some understanding of the difference in the two dopants. It was found that Al doping results in a higher carrier concentration than In doping, but any excess Al greatly decreases the mobility. In doping improves the mobility but with lower carrier concentrations. Calculations based on density functional theory support the experimental data, showing that Al is a shallower dopant than In. Unit cell volume comparisons between theory and experiment correspond well. The interplay between substitutional doping, oxygen vacancies, and possible adventitious H doping makes the doped ZnO system difficult to analyze definitively.

Book Atomic Layer Deposition for Semiconductors

Download or read book Atomic Layer Deposition for Semiconductors written by Cheol Seong Hwang and published by Springer Science & Business Media. This book was released on 2013-10-18 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering thorough coverage of atomic layer deposition (ALD), this book moves from basic chemistry of ALD and modeling of processes to examine ALD in memory, logic devices and machines. Reviews history, operating principles and ALD processes for each device.

Book International Aerospace Abstracts

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt: