Graphene Optoelectronics

Author: Abdul Rashid bin M. Yusoff
Publisher: John Wiley & Sons
ISBN: 3527677801
Size: 72.40 MB
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Graphene Optoelectronics from the Author: Abdul Rashid bin M. Yusoff. This first book on emerging applications for this innovative material gives an up-to-date account of the many opportunities graphene offers high-end optoelectronics. The text focuses on potential as well as already realized applications, discussing metallic and passive components, such as transparent conductors and smart windows, as well as high-frequency devices, spintronics, photonics, and terahertz devices. Also included are sections on the fundamental properties, synthesis, and characterization of graphene. With its unique coverage, this book will be welcomed by materials scientists, solid-state chemists and solid-state physicists alike.

Optoelectronics Of Graphene Based Van Der Waals Heterostructures

Author: Qiong Ma (Ph. D.)
Publisher:
ISBN:
Size: 53.69 MB
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Optoelectronics Of Graphene Based Van Der Waals Heterostructures from the Author: Qiong Ma (Ph. D.). Research on van der Waals (vdW) materials (homo- or hetero-) is a rapidly emerging field in condensed matter physics. They are layered structures with strong chemical bonding within layers and relatively weak van der Waals force to combine layers together. This unique layer-bylayer nature makes it easy to exfoliate layers out and at the same time to re-assemble in arbitrary sequences with different combinations. The versatility, flexibility, and relatively low cost of production make the scientific community enthusiastic about their future. In this thesis, I investigate the fundamental physical processes of light-matter interactions in these layered structures, including graphene, boron nitride, transition metal dichalcogenides and heterostructures formed from these materials. My research involves state-of-the-art nanoscale fabrication and microscale photocurrent spectroscopy and imaging. In Chapter 1, 1 will briefly discuss basic physical properties of the vdW materials involved in this thesis and introduce the main nanofabrication and measurement techniques. Chapter 2-4 are about hot electron dynamics and electron-phonon coupling in intrinsic graphene systems, among which Chapter 2 is focusing on the generation mechanism of the photocurrent at the p-n interface, which is demonstrated to have a photothermoelectric origin. This indicates a weak electron-phonon coupling strength in graphene. Chapter 3 is a direct experimental follow-up of the work in Chapter 2 and reveals the dominant electron-phonon coupling mechanism at different temperature and doping regimes. In Chapter 4, I present the observation of anomalous geometric photocurrent patterns in various devices at the charge neutral point. The spatial pattern can be understood as a local photo-generated current near edges being collected by remote electrodes. The anomalous behavior as functions of change density and temperature indicates an interesting regime of energy and charge dynamics. In Chapter 5 and 6, 1 will show the photoresponse of graphene-BN heterostuctures. In graphene-BN stack directly on SiO2, we observed strong photo-induced doping phenomenon, which can be understood as charge transfer from graphene across BN and eventually trapped at the interface between BN and SiO2. By inserting another layer of graphene between BN and SiO2 , we can measure an electrical current after photoexcitation due to such charge transfer. We further studied the competition between this vertical charge transfer and in-plane carrier-carrier scattering in different regimes. In Chapter 7, I will briefly summarize collaborated work with Prof. Dimitri Basov's group on near-field imaging of surface polariton in two-dimensional materials. This technique provides a complementary tool to examine the intriguing light-matter interaction (for large momentum excitations) in low-dimensional materials. Chapter 8 is the outlook, from my own point of view, what more can be done following this thesis.

Graphene Based Polymer Nanocomposites In Electronics

Author: Kishor Kumar Sadasivuni
Publisher: Springer
ISBN: 3319138758
Size: 52.91 MB
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Graphene Based Polymer Nanocomposites In Electronics from the Author: Kishor Kumar Sadasivuni. This book covers graphene reinforced polymers, which are useful in electronic applications, including electrically conductive thermoplastics composites, thermosets and elastomers. It systematically introduces the reader to fundamental aspects and leads over to actual applications, such as sensor fabrication, electromagnetic interference shielding, optoelectronics, superconductivity, or memory chips. The book also describes dielectric and thermal behaviour of graphene polymer composites - properties which are essential to consider for the fabrication and production of these new electronic materials. The contributions in this book critically discuss the actual questions in the development and applications of graphene polymer composites. It will thus appeal to chemists, physicists, materials scientists as well as nano technologists, who are interested in the properties of graphene polymer composites.

Nano Optoelectronic Sensors And Devices

Author: Ning Xi
Publisher: William Andrew
ISBN: 1437734723
Size: 65.65 MB
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Nano Optoelectronic Sensors And Devices from the Author: Ning Xi. Nanophotonics has emerged as a major technology and applications domain, exploiting the interaction of light-emitting and light-sensing nanostructured materials. These devices are lightweight, highly efficient, low on power consumption, and are cost effective to produce. The authors of this book have been involved in pioneering work in manufacturing photonic devices from carbon nanotube (CNT) nanowires and provide a series of practical guidelines for their design and manufacture, using processes such as nano-robotic manipulation and assembly methods. They also introduce the design and operational principles of opto-electrical sensing devices at the nano scale. Thermal annealing and packaging processes are also covered, as key elements in a scalable manufacturing process. Examples of applications of different nanowire based photonic devices are presented. These include applications in the fields of electronics (e.g. FET, CNT Schotty diode) and solar energy. Discusses opto-electronic nanomaterials, characterization and properties from an engineering perspective, enabling the commercialization of key emerging technologies Provides scalable techniques for nanowire structure growth, manipulation and assembly (i.e. synthesis) Explores key application areas such as sensing, electronics and solar energy

Molecular And Nano Tubes

Author: Oliver Hayden
Publisher: Springer Science & Business Media
ISBN: 9781441994431
Size: 48.26 MB
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Molecular And Nano Tubes from the Author: Oliver Hayden. Molecular- and Nano-Tubes summarizes recent advancements in the synthesis, fabrication and applications of tubular structures. An interdisciplinary overview of innovative science focused on tubular structures is provided. The reader is offered an overview of the different fields that molecular and nano tubes appear in, in order to learn the fundamental basics as well as the applications of these materials. This book also: Shows how nanotechnology creates novel materials by crossing the barriers between biology and material science, electronics and optics, medicine and more Demonstrates that tubes are a fundamental element in nature and used in disparate applications such as ion channels and carbon nanotubes Molecular- and Nano-Tubes is an ideal volume for researchers and engineers working in materials science and nanotechnology.

Issues In Nanotechnology And Micotechnology Electronic And Photonic Research 2013 Edition

Author:
Publisher: ScholarlyEditions
ISBN: 1490107657
Size: 10.78 MB
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Issues In Nanotechnology And Micotechnology Electronic And Photonic Research 2013 Edition from the Author: . Issues in Nanotechnology and Micotechnology—Electronic and Photonic Research: 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Microstructures. The editors have built Issues in Nanotechnology and Micotechnology—Electronic and Photonic Research: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Microstructures in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Nanotechnology and Micotechnology—Electronic and Photonic Research: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Functional Graphene Synthesis Characterization And Application In Optoelectronics

Author: Van Chuyen Pham
Publisher:
ISBN:
Size: 36.53 MB
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Functional Graphene Synthesis Characterization And Application In Optoelectronics from the Author: Van Chuyen Pham. Zusammenfassung: Graphene has recently attracted enormous attention within the scientific community due to its outstanding optical, electrical and mechanical properties, and is highly promising for various applications. Also, semiconducting CdSe quantum dots (QDs), with easily tunable optical and electrical properties, have already demonstrated their potential for application in various applications such as photovoltaics. In this thesis, the transparency, high carrier mobility and high specific surface area of graphene were combined with the optical properties of CdSe QDs in a novel hybrid material, CdSe QD decorated graphene. Based on the synergetic properties, the hybrid material has been successfully characterized by various methods and was introduced in the active layer of hybrid solar cells, remarkably enhancing the power conversion efficiency of the solar cells. Graphene oxide (GO) was synthesized by a modified Hummers method. Then, oxygen-containing groups within GO were reduced and partially transformed into thiol- functionalities. As a result, thiol-functionalized reduced graphene oxide (TrGO) was obtained. This was achieved by refluxing GO with phosphorus pentasulfide in dimethylformamide solvent. The thiol groups serve as anchor points for the attachment of nanoparticles. This was realized with CdSe QDs and ZnO nanoparticles, respectively via a self-assembly process, whereby novel hybrid materials were obtained: nanoparticle decorated TrGO. Various techniques and methods such as SEM, TEM, XPS, FTIR, UV-Vis absorption spectroscopy were used to characterize GO, rGO, TrGO and QD-TrGO hybrid materials. Based on the results, the materials were further modified and developed to obtain the desired properties and functionalities. Graphenes with different functionalities and reduction degrees were also investigated in comparison with carbon nanotubes using electron paramagnetic resonance (EPR) spectroscopy. For application in photovoltaics, CdSe QD-TrGO hybrid material was mixed with semiconducting polymers to form photoactive thin films which were utilized in hybrid solar cells. The photovoltaic cells showed significantly enhanced solar power conversion efficiencies. The graphene-based hybrid solar cells achieved a PCE of up to 4.24%, which is 46% higher than graphene-free cells and is in the range of the best efficiencies of hybrid quantum dot-polymer solar cells so far. Additionally, CdSe QD decorated rGO was tested regarding its utilization in photoconductors. Preliminary results proved that photo-induced charge transfer from QDs to graphene occurs, resulting in a measurable photocurrent contribution. This finding is consistent with those obtained from PL quenching experiments and the quenching of EPR signals for CdSe QD-TrGO hybrid materials. This finding further demonstrates the high potential of nanoparticle-graphene hybrid materials for optoelectronic applications

Cmoset 2012 Final Program

Author: CMOS Emerging Technologies Research
Publisher: CMOS Emerging Technologies Research
ISBN: 1927500605
Size: 49.74 MB
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Cmoset 2012 Final Program from the Author: CMOS Emerging Technologies Research. Final program for the CMOSET 2012 conference

Cmosetr 2015 Vol 4 Optoelectronics Photonics Track

Author: CMOS Emerging Technologies Research
Publisher: CMOS Emerging Technologies Research
ISBN: 1927500664
Size: 39.31 MB
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Cmosetr 2015 Vol 4 Optoelectronics Photonics Track from the Author: CMOS Emerging Technologies Research. Presentation slides for the Optoelectronics & Photonics track at CMOSETR 2015, May 20-22, 2015.

Graphene Science Handbook

Author: Mahmood Aliofkhazraei
Publisher: CRC Press
ISBN: 1466591323
Size: 25.74 MB
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Graphene Science Handbook from the Author: Mahmood Aliofkhazraei. Discover the Unique Electron Transport Properties of Graphene The Graphene Science Handbook is a six-volume set that describes graphene’s special structural, electrical, and chemical properties. The book considers how these properties can be used in different applications (including the development of batteries, fuel cells, photovoltaic cells, and supercapacitors based on graphene) and produced on a massive and global scale. Volume One: Fabrication Methods Volume Two: Nanostructure and Atomic Arrangement Volume Three: Electrical and Optical Properties Volume Four: Mechanical and Chemical Properties Volume Five: Size-Dependent Properties Volume Six: Applications and Industrialization This handbook describes the fabrication methods of graphene; the nanostructure and atomic arrangement of graphene; graphene’s electrical and optical properties; the mechanical and chemical properties of graphene; the size effects in graphene, characterization, and applications based on size-affected properties; and the application and industrialization of graphene. Volume three is dedicated to graphene’s electrical and optical properties and covers: Graphene and graphene nanoribbons for use in high-frequency transistors, energy-efficient electronics and photonic devices The interface of graphene/high-κ dielectrics The strain-induced modifications of plasmons in graphene A possible advanced physical framework for treating graphenic structures Recent progresses in the electric lens based on graphene-like materials The thermal and thermoelectric transport properties of graphene A numerical method for simulating the electromagnetic field interaction with single-layer graphene and more