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Morphological And Optical Properties Of Porous Gallium Nitride Gan Fabricated By Photoelectrochemical Process
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Book Synopsis Morphological and Optical Properties of Porous Gallium Nitride (GaN) Fabricated by Photoelectrochemical Process by : Sook Fong Cheah
Download or read book Morphological and Optical Properties of Porous Gallium Nitride (GaN) Fabricated by Photoelectrochemical Process written by Sook Fong Cheah and published by . This book was released on 2015 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fabrication of Porous Gallium Nitride by Photoelectrochemical Etching Method (Penerbit USM) by : Cheah Sook Fong
Download or read book Fabrication of Porous Gallium Nitride by Photoelectrochemical Etching Method (Penerbit USM) written by Cheah Sook Fong and published by Penerbit USM. This book was released on 2017 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoelectrochemical (PEC) etching is a simple and inexpensive wet etching approach that is widely used to fabricate porous gallium nitride (GaN) thin films. However, many fundamental issues on the etching mechanism and the optical response of the fabricated porous structure still remain unclear. In this book, PEC etched porous GaN thin films with a variety of morphologies such as circular, hexagonal, leaf like-, and honeycomb-like patterns were described in detail. The effects of semiconductor types, etching voltage and etching duration on the surface morphology and the optical response of the fabricated porous structure were discussed. Attenuated total reflection method which is very sensitive to the surface layer of the porous GaN was applied to extract the carrier concentration, porosity, and layer thicknesses or the porous layer. Through this book, a better understanding of the PEC etching of the porous GaN can be obtained.
Book Synopsis Porous Gallium Nitride Generated by Electroless Etching by : Todd L. Williamson
Download or read book Porous Gallium Nitride Generated by Electroless Etching written by Todd L. Williamson and published by . This book was released on 2005 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Studies of Focused Ion Beam Fabricated Gan Microstructures and Nanostructures by : XiaoHu Wang
Download or read book Optical Studies of Focused Ion Beam Fabricated Gan Microstructures and Nanostructures written by XiaoHu Wang and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Optical Studies of Focused Ion Beam Fabricated GaN Microstructures and Nanostructures" by Xiaohu, Wang, 王小虎, 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: In this thesis, Gallium Nitride (GaN) micro- and nanostructures were fabricated based on focused ion beam (FIB) milling. The starting wafer is an epitaxial structure containing InGaN/GaN multi-quantum wells. High crystal quality structures such as the nano-cone, nanopillar array and single pillar were fabricated based on the FIB method. During the fabrication process, various approaches were designed to minimize FIB damage caused by Gallium ion bombardment. The fabrication process for nano-cone is a combination of mask preparation by FIB with subsequent reactive ion etching (RIE). For fabricating nanopillar arrays, the nanopillars were patterned directly using FIB with an optimized beam current followed by wet etching process to remove the damage. On the other hand, the single pillar is achieved by gradually decreasing the ion beam current as the diameter of the pillar becomes smaller. The first order Raman spectra for the nanopillar array reveal a strong additional peak when the diameter of the nanopillars is less than 220 nm. This peak can also be observed in GaN pillars without MQW and is clearly assigned to the surface optical (SO) mode originated from the A1 phonon in wurtzite GaN. The frequency of this SO mode is found to be sensitive with the diameter and surface roughness of the nanopillars. Temperature-variable photoluminescence (PL) measurements show that a broadband emission in the as-grown sample split into the two well-resolved bands for nanopillars and the emission band at the higher energy side quickly thermally quenched. Room temperature PL measurements on the single pillars exhibit an increasing blue-shift of the peak emission with the decreasing of the pillar diameter. Additional simulation data and excitation power dependent PL studies confirm the observation of strain relaxation in the pillar's MQW due to FIB fabrication. The temperature variable PL on the single pillar shows a monotonous blue shift as the temperature arises to 300 K. DOI: 10.5353/th_b4715342 Subjects: Microstructure - Optical properties Nanostructured materials - Optical properties Focused ion beams Gallium nitride
Book Synopsis Properties, Processing and Applications of Gallium Nitride and Related Semiconductors by : James H. Edgar
Download or read book Properties, Processing and Applications of Gallium Nitride and Related Semiconductors written by James H. Edgar and published by Institution of Electrical Engineers. This book was released on 1999 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on its outstanding properties, including a wide energy band gap, high thermal conductivity, and high electron drift velocity, GaN is uniquely suited for many novel devices including solar-blind UV light detectors, high power microwave transistors, and cold cathode electron emitters. This excellent reference covers the basic physical and chemical properties, surveys existing processing technology, and presents summaries of the current state-of-the-art of devices.
Book Synopsis Porous Silicon Carbide and Gallium Nitride by : Randall M. Feenstra
Download or read book Porous Silicon Carbide and Gallium Nitride written by Randall M. Feenstra and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porous Silicon Carbide and Gallium Nitride: Epitaxy, Catalysis, and Biotechnology Applications presents the state-of-the-art in knowledge and applications of porous semiconductor materials having a wide band gap. This comprehensive reference begins with an overview of porous wide-band-gap technology, and describes the underlying scientific basis for each application area. Additional chapters cover preparation, characterization, and topography; processing porous SiC; medical applications; magnetic ion behavior, and many more
Book Synopsis Technology of Gallium Nitride Crystal Growth by : Dirk Ehrentraut
Download or read book Technology of Gallium Nitride Crystal Growth written by Dirk Ehrentraut and published by Springer Science & Business Media. This book was released on 2010-06-14 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the important technological aspects of the growth of GaN single crystals by HVPE, MOCVD, ammonothermal and flux methods for the purpose of free-standing GaN wafer production.
Book Synopsis Semiconductor Materials and Technology by : Mohd Syamsul Nasyriq
Download or read book Semiconductor Materials and Technology written by Mohd Syamsul Nasyriq and published by Trans Tech Publications Ltd. This book was released on 2020-03-10 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Conference on Semiconductor Materials and Technology (ICoSeMT 2019, 29-30 April 2019, Penang, Malaysia) was an inaugural event organized by the Institute of Nano Optoelectronics Research and Technology (INOR) and Universiti Sains Malaysia (USM) in conjunction with the 50th Anniversary of USM. This volume presents for readers the collection of papers that were represented on this event and reflects the modern trends in the area of materials science and technologies for opto- and microelectronics, photovoltaic systems, and photocatalysis, in analyze properties of modern functional materials, polymers, and composites. This collection will be useful for specialists from many branches of modern manufacture.
Book Synopsis GaN-based Materials and Devices by : Michael Shur
Download or read book GaN-based Materials and Devices written by Michael Shur and published by World Scientific. This book was released on 2004 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique materials properties of GaN-based semiconductors havestimulated a great deal of interest in research and developmentregarding nitride materials growth and optoelectronic andnitride-based electronic devices. High electron mobility andsaturation velocity, high sheet carrier concentration atheterojunction interfaces, high breakdown field, and low thermalimpedance of GaN-based films grown over SiC or bulk AlN substratesmake nitride-based electronic devices very promising.
Book Synopsis Photoelectrochemical Water Splitting by : Zhebo Chen
Download or read book Photoelectrochemical Water Splitting written by Zhebo Chen and published by Springer Science & Business Media. This book was released on 2013-08-28 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book outlines many of the techniques involved in materials development and characterization for photoelectrochemical (PEC) – for example, proper metrics for describing material performance, how to assemble testing cells and prepare materials for assessment of their properties, and how to perform the experimental measurements needed to achieve reliable results towards better scientific understanding. For each technique, proper procedure, benefits, limitations, and data interpretation are discussed. Consolidating this information in a short, accessible, and easy to read reference guide will allow researchers to more rapidly immerse themselves into PEC research and also better compare their results against those of other researchers to better advance materials development. This book serves as a “how-to” guide for researchers engaged in or interested in engaging in the field of photoelectrochemical (PEC) water splitting. PEC water splitting is a rapidly growing field of research in which the goal is to develop materials which can absorb the energy from sunlight to drive electrochemical hydrogen production from the splitting of water. The substantial complexity in the scientific understanding and experimental protocols needed to sufficiently pursue accurate and reliable materials development means that a large need exists to consolidate and standardize the most common methods utilized by researchers in this field.
Book Synopsis Handbook of Porous Silicon by : Leigh Canham
Download or read book Handbook of Porous Silicon written by Leigh Canham and published by Springer. This book was released on 2021-01-14 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Porous Silicon brings together the expertise of a large, international team of almost 100 academic researchers, engineers, and product developers from industry across electronics, medicine, nutrition and consumer care to summarize the field in its entirity with 150 chapters and 5000 references. The volume presents 5 parts which cover fabrication techniques, material properties, characterization techniques, processing and applications. Much attention was given in the the past to its luminescent properties, but increasingly it is the biodegradability, mechanical, thermal and sensing capabilities that are attracting attention. The volume is divided into focussed data reviews with, wherever possible, quantitative rather than qualitative descriptions of both properties and performance. The book is targeted at undergraduates, postgraduates, and experienced researchers.
Book Synopsis Zinc Oxide Nanostructures by : Magnus Willander
Download or read book Zinc Oxide Nanostructures written by Magnus Willander and published by CRC Press. This book was released on 2014-07-22 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) in its nanostructured form is emerging as a promising material with great potential for the development of many smart electronic devices. This book presents up-to-date information about various synthesis methods to obtain device-quality ZnO nanostructures. It describes both high-temperature (over 100 C) and low-temperature (under
Book Synopsis Optoelectronic Devices by : M Razeghi
Download or read book Optoelectronic Devices written by M Razeghi and published by Elsevier. This book was released on 2004 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tremendous progress has been made in the last few years in the growth, doping and processing technologies of the wide bandgap semiconductors. As a result, this class of materials now holds significant promis for semiconductor electronics in a broad range of applications. The principal driver for the current revival of interest in III-V Nitrides is their potential use in high power, high temperature, high frequency and optical devices resistant to radiation damage. This book provides a wide number of optoelectronic applications of III-V nitrides and covers the entire process from growth to devices and applications making it essential reading for those working in the semiconductors or microelectronics. Broad review of optoelectronic applications of III-V nitrides
Book Synopsis Chemically Deposited Nanocrystalline Metal Oxide Thin Films by : Fabian I. Ezema
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 Synopsis The Physics of Semiconductor Devices by : R. K. Sharma
Download or read book The Physics of Semiconductor Devices written by R. K. Sharma and published by Springer. This book was released on 2019-01-31 with total page 1299 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book disseminates the current knowledge of semiconductor physics and its applications across the scientific community. It is based on a biennial workshop that provides the participating research groups with a stimulating platform for interaction and collaboration with colleagues from the same scientific community. The book discusses the latest developments in the field of III-nitrides; materials & devices, compound semiconductors, VLSI technology, optoelectronics, sensors, photovoltaics, crystal growth, epitaxy and characterization, graphene and other 2D materials and organic semiconductors.
Book Synopsis Electrical Properties of Materials by : Laszlo Solymar
Download or read book Electrical Properties of Materials written by Laszlo Solymar and published by OUP Oxford. This book was released on 2009-10-22 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: An informal and highly accessible writing style, a simple treatment of mathematics, and clear guide to applications, have made this book a classic text in electrical and electronic engineering. Students will find it both readable and comprehensive. The fundamental ideas relevant to the understanding of the electrical properties of materials are emphasized; in addition, topics are selected in order to explain the operation of devices having applications (or possible future applications) in engineering. The mathematics, kept deliberately to a minimum, is well within the grasp of a second-year student. This is achieved by choosing the simplest model that can display the essential properties of a phenomenom, and then examining the difference between the ideal and the actual behaviour. The whole text is designed as an undergraduate course. However most individual sections are self contained and can be used as background reading in graduate courses, and for interested persons who want to explore advances in microelectronics, lasers, nanotechnology and several other topics that impinge on modern life.
Book Synopsis MEMS Materials and Processes Handbook by : Reza Ghodssi
Download or read book MEMS Materials and Processes Handbook written by Reza Ghodssi and published by Springer Science & Business Media. This book was released on 2011-03-18 with total page 1211 pages. Available in PDF, EPUB and Kindle. Book excerpt: MEMs Materials and Processes Handbook" is a comprehensive reference for researchers searching for new materials, properties of known materials, or specific processes available for MEMS fabrication. The content is separated into distinct sections on "Materials" and "Processes". The extensive Material Selection Guide" and a "Material Database" guides the reader through the selection of appropriate materials for the required task at hand. The "Processes" section of the book is organized as a catalog of various microfabrication processes, each with a brief introduction to the technology, as well as examples of common uses in MEMs.
