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Author : Xinyi Chen (Ph. D.)
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (828 download)
Download or read book Wide Band-gap Nanostructure Based Devices written by Xinyi Chen (Ph. D.) and published by . This book was released on 2012 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xinyi Chen
Publisher : Open Dissertation Press
ISBN 13 : 9781361307649
Total Pages : pages
Book Rating : 4.3/5 (76 download)
Download or read book Wide Band-Gap Nanostructure Based Devices written by Xinyi Chen 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, "Wide Band-gap Nanostructure Based Devices" by Xinyi, Chen, 陈辛夷, 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: Wide band gap based nanostructures have being attracting much research interest because of their promise for application in optoelectronic devices. Among those wide band gap semiconductors, gallium nitride (GaN) and zinc oxide (ZnO) are the most commonly studied and optoelectronic devices based on GaN and ZnO have been widely investigated. This thesis concentrates on the growth, optical and electrical properties of GaN and ZnO nanostructures, plus their application in solar cells and light emitting diodes (LEDs). GaN-nanowire based dye sensitized solar cells were studied. Different post-growth treatments such as annealing and coating with a TiOx shell were applied to enhance dye absorption. It was found that TiOx increased the dye absorption and the performance of the dye sensitized solar cell. ZnO nanorods were synthesized by vapor deposition and electrodeposition. Post-growth treatments such as annealing and hydrothermal processing were used to modify the defect chemistry and optical properties. LEDs based on GaN/ZnO heterojunctions were studied. The influence of ZnO seed layers on GaN/ZnO LEDs was investigated. GaN/ZnO LEDs based on ZnO nanorods with MgO and TiOx shells were also prepared in order to modify the LED performance. The coating condition of the shell was found to influence the current-voltage (I-V) characteristics and device performance. Moreover, high brightness LEDs based on GaN with InGaN multiple quantum wells were also fabricated. The origin of the emission from GaN/ZnO LEDs was studied using different kinds of GaN substrates. Direct metal contacts on bare GaN substrates were also employed to investigate the optical emission and electrical properties. It is found that the emission from the GaN/ZnO LEDs probably originated from the GaN substrate. GaN/ZnO LEDs with MgO as an interlayer were also fabricated. The MgO layer was expected to modify the band alignment between the GaN and the ZnO. It was shown that GaN/MgO/ZnO heterojunctions (using both ZnO nanorods and ZnO films) have quite different emission performance under forward bias compared to those that have no MgO interlayer. An emission peak was around 400 nm could originate from ZnO. Nitrogen doped ZnO nanorods on n-type GaN have been prepared by electrodeposition. Zinc nitrate and zinc acetate were used as ZnO precursors and NH4NO3 was used as a nitrogen precursor. Only the ZnO nanorods made using zinc nitrate showed obvious evidence of doping and coherent I-V characteristics. Cerium doped ZnO based LEDs were fabricated and showed an emission that depended on the cerium precursor that was employed. This indicates that the choice of precursor influences the growth, the materials properties and the optical properties of ZnO. DOI: 10.5353/th_b4979929 Subjects: Gallium nitride Zinc oxide Wide gap semiconductors - Materials Nanostructured materials Solar cells Light emitting diodes
Author : Xinyi Chen (Ph. D.)
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (828 download)
Download or read book Wide Band-gap Nanostructure Based Devices written by Xinyi Chen (Ph. D.) and published by . This book was released on 2012 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jung-Hun Seo
Publisher : MDPI
ISBN 13 : 3038978426
Total Pages : 138 pages
Book Rating : 4.0/5 (389 download)
Download or read book Wide Bandgap Semiconductor Based Micro/Nano Devices written by Jung-Hun Seo and published by MDPI. This book was released on 2019-04-25 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: While group IV or III-V based device technologies have reached their technical limitations (e.g., limited detection wavelength range or low power handling capability), wide bandgap (WBG) semiconductors which have band-gaps greater than 3 eV have gained significant attention in recent years as a key semiconductor material in high-performance optoelectronic and electronic devices. These WBG semiconductors have two definitive advantages for optoelectronic and electronic applications due to their large bandgap energy. WBG energy is suitable to absorb or emit ultraviolet (UV) light in optoelectronic devices. It also provides a higher electric breakdown field, which allows electronic devices to possess higher breakdown voltages. This Special Issue seeks research papers, short communications, and review articles that focus on novel synthesis, processing, designs, fabrication, and modeling of various WBG semiconductor power electronics and optoelectronic devices.
Author : Vincent Consonni
Publisher : John Wiley & Sons
ISBN 13 : 1118984307
Total Pages : 467 pages
Book Rating : 4.1/5 (189 download)
Download or read book Wide Band Gap Semiconductor Nanowires 1 written by Vincent Consonni and published by John Wiley & Sons. This book was released on 2014-08-08 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: GaN and ZnO nanowires can by grown using a wide variety of methods from physical vapor deposition to wet chemistry for optical devices. This book starts by presenting the similarities and differences between GaN and ZnO materials, as well as the assets and current limitations of nanowires for their use in optical devices, including feasibility and perspectives. It then focuses on the nucleation and growth mechanisms of ZnO and GaN nanowires, grown by various chemical and physical methods. Finally, it describes the formation of nanowire heterostructures applied to optical devices.
Author : Vincent Consonni
Publisher : John Wiley & Sons
ISBN 13 : 1118984285
Total Pages : 316 pages
Book Rating : 4.1/5 (189 download)
Download or read book Wide Band Gap Semiconductor Nanowires 2 written by Vincent Consonni and published by John Wiley & Sons. This book was released on 2014-08-08 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, the second of two volumes, describes heterostructures and optoelectronic devices made from GaN and ZnO nanowires. Over the last decade, the number of publications on GaN and ZnO nanowires has grown exponentially, in particular for their potential optical applications in LEDs, lasers, UV detectors or solar cells. So far, such applications are still in their infancy, which we analyze as being mostly due to a lack of understanding and control of the growth of nanowires and related heterostructures. Furthermore, dealing with two different but related semiconductors such as ZnO and GaN, but also with different chemical and physical synthesis methods, will bring valuable comparisons in order to gain a general approach for the growth of wide band gap nanowires applied to optical devices.
Author : Jung-Hun Seo
Publisher :
ISBN 13 : 9783038978435
Total Pages : 138 pages
Book Rating : 4.9/5 (784 download)
Download or read book Wide Bandgap Semiconductor Based Micro/Nano Devices written by Jung-Hun Seo and published by . This book was released on 2019 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: While group IV or III-V based device technologies have reached their technical limitations (e.g., limited detection wavelength range or low power handling capability), wide bandgap (WBG) semiconductors which have band-gaps greater than 3 eV have gained significant attention in recent years as a key semiconductor material in high-performance optoelectronic and electronic devices. These WBG semiconductors have two definitive advantages for optoelectronic and electronic applications due to their large bandgap energy. WBG energy is suitable to absorb or emit ultraviolet (UV) light in optoelectronic devices. It also provides a higher electric breakdown field, which allows electronic devices to possess higher breakdown voltages. This Special Issue seeks research papers, short communications, and review articles that focus on novel synthesis, processing, designs, fabrication, and modeling of various WBG semiconductor power electronics and optoelectronic devices.
Author : Gyu-Chul Yi
Publisher : Springer Science & Business Media
ISBN 13 : 3642224806
Total Pages : 347 pages
Book Rating : 4.6/5 (422 download)
Download or read book Semiconductor Nanostructures for Optoelectronic Devices written by Gyu-Chul Yi and published by Springer Science & Business Media. This book was released on 2012-01-13 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the fabrication of optoelectronic nanodevices. The structures considered are nanowires, nanorods, hybrid semiconductor nanostructures, wide bandgap nanostructures for visible light emitters and graphene. The device applications of these structures are broadly explained. The book deals also with the characterization of semiconductor nanostructures. It appeals to researchers and graduate students.
Author : Sabrina Grassini
Publisher : MDPI
ISBN 13 : 3039216368
Total Pages : 86 pages
Book Rating : 4.0/5 (392 download)
Download or read book Nanostructure Based Sensors for Gas Sensing: from Devices to Systems written by Sabrina Grassini and published by MDPI. This book was released on 2019-10-29 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of solid state gas sensors based on microtransducers and nanostructured sensing materials is the key point in the design of portable measurement systems able to reach sensing and identification performance comparable with analytical ones. In such a context several efforts must be spent of course in the development of the sensing material, but also in the choice of the transducer mechanism and its structure, in the electrical characterization of the performance and in the design of suitable measurement setups. This call for papers invites researchers worldwide to report about their novel results on the most recent advances and overview in design and measurements for applications in gas sensors, along with their relevant features and technological aspects. Original research papers are welcome (but not limited) on all aspects that focus on the most recent advances in: (i) basic principles and modeling of gas and VOCs sensors; (ii) new gas sensor principles and technologies; (iii) Characterization and measurements methodologies; (iv) transduction and sampling systems; (vi) package optimization; (vi) gas sensor based systems and applications.
Author : Kiyoshi Takahashi
Publisher : Springer Science & Business Media
ISBN 13 : 3540472355
Total Pages : 481 pages
Book Rating : 4.5/5 (44 download)
Download or read book Wide Bandgap Semiconductors written by Kiyoshi Takahashi and published by Springer Science & Business Media. This book was released on 2007-04-12 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive overview of the development, current state, and future prospects of wide bandgap semiconductor materials and related optoelectronics devices. With 901 references, 333 figures and 21 tables, this book will serve as a one-stop source of knowledge on wide bandgap semiconductors and related optoelectronics devices.
Author : Mohamed Henini
Publisher : Elsevier Science
ISBN 13 : 9780080463254
Total Pages : 841 pages
Book Rating : 4.4/5 (632 download)
Download or read book Handbook of Self Assembled Semiconductor Nanostructures for Novel Devices in Photonics and Electronics written by Mohamed Henini and published by Elsevier Science. This book was released on 2008 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1969, Leo Esaki (1973 Nobel Laureate) and Ray Tsu from IBM, USA, proposed research on “man-made crystals” using a semiconductor superlattice (a semiconductor structure comprising several alternating ultra-thin layers of semiconductor materials with different properties). This invention was perhaps the first proposal to advocate the engineering of a new semiconductor material, and triggered a wide spectrum of experimental and theoretical investigations. However, the study of what are now called low dimensional structures (LDS) began in the late 1970's when sufficiently thin epitaxial layers were first produced following developments in the technology of epitaxial growth of semiconductors, mainly pioneered in industrial laboratories for device purposes. The LDS are materials structures whose dimensions are comparable with inter-atomic distances in solids (i.e. nanometre, nm). Their electronic properties are significantly different from the same material in bulk form. These properties are changed by quantum effects. At the inception of their investigation it was already clear that such structures were of great scientific interest and excitement and their novel properties caused by quantum effects offered potential for application in new devices. Moreover these complex LDS offer device engineers new design opportunities for tailor-made new generation electronic devices. The LDS could be considered as a new branch of condensed matter physics because of the large variety of possible structures and the changes in the physical processes. One of the promising fabrication methods to produce and study structures with a dimension less than two such as quantum wires and quantum dots, in order to realise novel devices that make use of low-dimensional confinement effects, is self-organisation. Self-assembled nanostructured materials offer a number of advantages over conventional material technologies in a wide-range of sectors. Clearly, future research work on self-assembled nanostructures will connect diverse areas of material science, physics, chemistry, electronics and optoelectronics. Key Features: - Contributors are world leaders in the field - Brings together all the factors which are essential in self-organisation of quantum nanostructures - Reviews the current status of research and development in self-organised nanostructured materials - Provides a ready source of information on a wide range of topics - Useful to any scientist who is involved in nanotechnology - Excellent starting point for workers entering the field - Serves as an excellent reference manual
Author : Jagat B. Shakya
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (58 download)
Download or read book Micro/nano-photonic Structures and Devices of III-nitride Wide Band-gap Semiconductors written by Jagat B. Shakya and published by . This book was released on 2004 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fan Ren
Publisher :
ISBN 13 : 9780750325165
Total Pages : 0 pages
Book Rating : 4.3/5 (251 download)
Download or read book Wide Bandgap Semiconductor-based Electronics written by Fan Ren and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Advances in wide bandgap semiconductor materials are enabling the development of a new generation of power semiconductor devices that far exceed the performance of silicon-based devices. These technologies offer potential breakthrough performance for a wide range of applications, including high-power and RF electronics, deep-UV optoelectronics, quantum information and extreme-environment applications. This reference text provides comprehensive coverage of the challenges and latest research in wide and ultra-wide bandgap semiconductors. Leading researchers from around the world provide reviews on the latest development of materials and devices in these systems. The book is an essential reference for researchers and practitioners in the field of wide bandgap semiconductors and power electronics, and valuable supplementary reading for advanced courses in these areas." -- Prové de l'editor.
Author : Mark A. Prelas
Publisher : Springer
ISBN 13 : 0792334051
Total Pages : 531 pages
Book Rating : 4.7/5 (923 download)
Download or read book Wide Band Gap Electronic Materials written by Mark A. Prelas and published by Springer. This book was released on 1995-05-31 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: Minsk, Belarus was the site of the NATO ARW on Wide Band-Gap electronic Materials May 3 through 6,1994; 143 participants and observers from 15 countries met for the NATO Advanced Research Workshop on Wide Band-Gap Electronic Materials (NATO ARW). The meeting was marked by a remarkable free exchange between east and west on these topics by revealing technical achievements not widely known or available in the west because ofpast political climate or present economic realities in the Newly IndependentStates. The topics ranged from electron doping of diamond, n-type diamond, negative electron affinity ofdiamond, applications of aluminum nitride, doping ofboron nitride, wideband gap electronic applications, to nanophase diamond. Of the many high-lights during the scientific meetings, an energy sub band due to defects in the diamond lattice was described. These defects areresponsible for the light emission from a diamond Light Emitting Diode (LED) which was demonstrated at the NATO ARW. This diamond LED can emitred, green, and blue light. The potential for "high tech" nanostructure electronic devices such as quantum transistors was described which mightsome day revolutionize electronics. The prospectsofaluminum nitride for acusto devices,piezodevices, and electroluminescencedevices were discussed.
Author : , Prof. Dr. Ahmed Nahhas
Publisher : BoD – Books on Demand
ISBN 13 : 1789239575
Total Pages : 148 pages
Book Rating : 4.7/5 (892 download)
Download or read book Zinc Oxide Based Nano Materials and Devices written by , Prof. Dr. Ahmed Nahhas and published by BoD – Books on Demand. This book was released on 2019-10-09 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a review of recent advances in ZnO-based nanomaterials and devices. ZnO as a nanomaterial has gained substantial interest in the research area of wide bandgap semiconductors and is considered to be one of the major candidates for electronic and photonic applications. ZnO has distinguished and interesting electrical and optical properties and is considered to be a potential material in optoelectronic applications such as solar cells, surface acoustic wave devices, and UV emitters. ZnO's unique properties have attracted several researchers to study its electrical and optical properties. As a nanostructured material, ZnO exhibits many advantages for nanodevices. Moreover, it has the ability to absorb the UV radiation.
Author : Alexei Nazarov
Publisher : Springer
ISBN 13 : 3319088041
Total Pages : 464 pages
Book Rating : 4.3/5 (19 download)
Download or read book Functional Nanomaterials and Devices for Electronics, Sensors and Energy Harvesting written by Alexei Nazarov and published by Springer. This book was released on 2014-08-28 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains reviews of recent experimental and theoretical results related to nanomaterials. It focuses on novel functional materials and nanostructures in combination with silicon on insulator (SOI) devices, as well as on the physics of new devices and sensors, nanostructured materials and nano scaled device characterization. Special attention is paid to fabrication and properties of modern low-power, high-performance, miniaturized, portable sensors in a wide range of applications such as telecommunications, radiation control, biomedical instrumentation and chemical analysis. In this book, new approaches exploiting nanotechnologies (such as UTBB FD SOI, Fin FETs, nanowires, graphene or carbon nanotubes on dielectric) to pave a way between “More Moore” and “More than Moore” are considered, in order to create different kinds of sensors and devices which will consume less electrical power, be more portable and totally compatible with modern microelectronics products.
Author : Stephen Pearton
Publisher : Elsevier
ISBN 13 : 0128145226
Total Pages : 510 pages
Book Rating : 4.1/5 (281 download)
Download or read book Gallium Oxide written by Stephen Pearton and published by Elsevier. This book was released on 2018-10-15 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gallium Oxide: Technology, Devices and Applications discusses the wide bandgap semiconductor and its promising applications in power electronics, solar blind UV detectors, and in extreme environment electronics. It also covers the fundamental science of gallium oxide, providing an in-depth look at the most relevant properties of this materials system. High quality bulk Ga2O3 is now commercially available from several sources and n-type epi structures are also coming onto the market. As researchers are focused on creating new complex structures, the book addresses the latest processing and synthesis methods. Chapters are designed to give readers a complete picture of the Ga2O3 field and the area of devices based on Ga2O3, from their theoretical simulation, to fabrication and application. Provides an overview of the advantages of the gallium oxide materials system, the advances in in bulk and epitaxial crystal growth, device design and processing Reviews the most relevant applications, including photodetectors, FETs, FINFETs, MOSFETs, sensors, catalytic applications, and more Addresses materials properties, including structural, mechanical, electrical, optical, surface and contact
