Download or read book Growth and Characterization of Silicon Nanowires for Solar Cell Applications written by Hanaa Flayeh Al-Taay and published by . This book was released on 2014 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Copye van het vonnis uytgesproken by Schepenen van der Keure der stad Gend tot laste van Jacobus Janssens ge xecuteert den 17 July 1790 written by and published by . This book was released on 1790 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Epitaxial Growth Characterization and Solar Cell Application of InN Nanowires on Silicon written by Yi-Lu Chang and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semiconductor Nanowires written by J Arbiol and published by Elsevier. This book was released on 2015-03-31 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor nanowires promise to provide the building blocks for a new generation of nanoscale electronic and optoelectronic devices. Semiconductor Nanowires: Materials, Synthesis, Characterization and Applications covers advanced materials for nanowires, the growth and synthesis of semiconductor nanowires—including methods such as solution growth, MOVPE, MBE, and self-organization. Characterizing the properties of semiconductor nanowires is covered in chapters describing studies using TEM, SPM, and Raman scattering. Applications of semiconductor nanowires are discussed in chapters focusing on solar cells, battery electrodes, sensors, optoelectronics and biology. - Explores a selection of advanced materials for semiconductor nanowires - Outlines key techniques for the property assessment and characterization of semiconductor nanowires - Covers a broad range of applications across a number of fields

Download or read book Integration and Characterization of Individual Radial Junction Silicon Nanowires for Photovoltaic Applications written by Xin Wang and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Considerable attention has been devoted to silicon (Si) nanowire arrays for photovoltaic energy conversion applications. Vertical arrays of Si nanowires with radial p-n/p-i-n junctions decouple the light absorption direction and photogenerated carrier collection direction, which enables the use of lower-quality Si materials without sacrificing device performance. Moreover, vapor-liquid-solid (VLS) technique offers the possibility of growing Si nanowires on inexpensive substrates such as glass or metal foil instead of crystalline Si substrates, which can reduce the cost of Si-based solar cells. The radial junction dark current plays an important role in the photovoltaic performance of these devices because Si nanowire arrays have significantly larger electrically active junction area relative to illuminated area of the solar cell. Previously reported Si nanowire solar cell devices suffer from the high dark current, low open circuit voltage, and low energy conversion efficiency. Therefore, it is necessary to understand the mechanisms responsible for the high dark current in radial junction Si nanowires and to develop strategies to improve junction properties through optimization of the VLS growth and shell coating processes. This thesis reports on the electrical and photovoltaic properties of individual radial junction Si nanowire devices to evaluate the effectiveness of different nanowire VLS growth and shell coating conditions. A process was developed to fabricate radial p+-n+ and p+-i-n+ junction Si nanowire devices that combines deterministic bottom-up assembly of individual nanowires with conventional top-down device nanofabrication. The effect of the metal catalyst, coating morphology and shell layer passivation were investigated in this research. In chapter 3, VLS growth using Al as catalyst was used to synthesize the p-type Si nanowires. Radial junctions were formed by low pressure chemical vapor deposition (LPCVD) of n+ or i-n+ Si layers on the p-type nanowires. In chapter 4, p-type nanowires were synthesized by VLS growth using Au as catalyst. The n-type shells were deposited by LPCVD at different growth temperatures to investigate the effect of coating morphology and pretreatment conditions on the electrical properties of the junctions. In chapter 5, radial heterojunction with intrinsic thin-layer (HIT) nanowire junctions were formed by plasma enhanced chemical vapor deposition (PECVD) of amorphous hydrogenated Si (a-Si:H) i-n layers on Au-catalyzed VLS-grown p-type wires. The electrical properties and photovoltaic performance of devices fabricated from individual radial junction nanowires were evaluated by current-voltage (I-V) measurement in the dark and under Air Mass 1.5 Global (AM 1.5G) illumination. Variable-temperature I-V measurements were used to analyze the mechanisms responsible for the dark current and to determine the conditions that produce the highest quality radial nanowire junctions for photovoltaic applications.

Download or read book The Growth and Characterization of Silicon Nanowires written by Parul Sharma and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Epitaxial Growth Characterization and Solar Cell Application of Indium Nitride Nanowires on Silicon written by Yi-Lu Chang and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fabrication and Characterization of Nanowires and Quantum Dots for Advanced Solar Cell Architectures written by Bahareh Sadeghimakki and published by . This book was released on 2012 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The commercially available solar cells suffer from low conversion efficiency due to the thermalization and transmission losses arising from the mismatch between the band gap of the semiconductor materials and the solar spectrum. Advanced device architectures based on nanomaterial have been proposed and being successfully used to enhance the efficiency of the solar cells. Quantum dots (QDs) and nanowires (NWs) are the nanosclae structures that have been exploited for the development of the third generation solar cell devices and nanowire based solar cells, respectively. The optical and electrical properties of these materials can be tuned by their size and geometry; hence they have great potential for the production of highly efficient solar cell. Application of QDs and NWs with enhanced optoelectronic properties and development of low-cost fabrication processes render a new generation of economic highly efficient PV devices. The most significant contribution of this PhD study is the development of simple and cost effective methods for fabrication of nanowires and quantum dots for advanced solar cell architectures. In advanced silicon nanowires (SiNWs) array cell, SiNWs have been widely synthesised by the well-known vapor-liquid-solid method. Electron beam lithography and deep reactive ion etching have also been employed for fabrication of SiNWs. Due to the high price and complexity of these methods, simple and cost effective approaches are needed for the fabrication of SiNWs. In another approach, to enhance the cell efficiency, organic dyes and polymers have been widely used as luminescent centers and host mediums in the luminescent down shifting (LDS) layers. However, due to the narrow absorption band of the dyes and degradation of the polymers by moisture and heat, these materials are not promising candidates to use as LDS. Highly efficient luminescent materials and transparent host materials with stable mechanical properties are demanded for luminescent down shifting applications. In this project, simple fabrication processes were developed to produce SiNWs and QDs for application in advanced cell architectures.

Download or read book The growth and characterization of silicon nanowires carbon nanotubes for heterojunctions written by Parul Sharma and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization and Optimization of Silicon Nanowires for Biosensing and Photovoltaic Applications written by Dong Rip Kim and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One-dimensional nanowires, due to their excellent electrical, optical, and chemical properties, and large surface to volume ratios, offer the promise of producing revolutionary advances in many areas of technology. This study investigates two application examples of Si nanowires (SiNWs) in the areas of biosensing and solar cells, respectively. First, SiNWs have been highlighted as real-time, label-free, multiplexing, and femtomolar level accuracy biosensors. However, SiNWs are frequently placed on the bottom wall of a microfluidic channel in the sensing process where the convection velocity is almost zero such that the performance of SiNW biosensors is restrained by the analyte transport. Moreover, although the sensing is carried out in a microfluidic environment where the charged analytes coexist with charged ions of the electrolytic solution, efforts are lacking in understanding the effects of charged ions in the electrolytic solution on the sensing performance of SiNWs. Herein, this study focuses on the characterization and optimization of microfluidic sensing environment for SiNW biosensors in terms of the response time, sensitivity, and selectivity. Our numerical studies suggest that the diffusive analyte transport currently limits the response time of SiNW biosensors. Through microfluidic optimization, about 17.4 times faster response time and doubled sensitivity are achievable in SiNW biosensing. In addition, our experimental investigation shows that SiNWs can also detect ionic movements and distributions other than targeted species inside the microfluidic channel, which can affect the selectivity of SiNW biosensors and lead to false signals. Second, vertically aligned radial junction Si wire array solar cells can offer the opportunity to use lower grade material to produce efficient solar cells, due to the decoupling of light absorption and charge-carrier collection directions, and enhanced light trapping. Nevertheless, radial junction Si wire array solar cells still face critical challenges such as large junction and surface recombination losses of photogenerated charge carriers due to their inherent large surface area, which is one of the primary reasons responsible for the gap between reported experimental efficiencies (typically below 10%) and the estimated 17% theoretical efficiency. Therefore, we experimentally investigated junction and surface passivation strategies to effectively suppress large junction and surface recombinations of vertically aligned radial junction Si wire array solar cells. The inclusion of intrinsic polycrystalline Si layer between the p-n junction layers increases the efficiency by about 30% by reducing the dark current, and the top amorphous silicon nitride layer improves the efficiency by about 20% due to its combined surface passivation and antireflection effects. With the combination of both passivation layers, the maximum efficiency of our solar cells is improved from 7.2% to 11.0% under AM 1.5G illumination.

Download or read book Semiconductor Nanowires II Properties and Applications written by and published by Academic Press. This book was released on 2016-01-11 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor Nanowires: Part B, and Volume 94 in the Semiconductor and Semimetals series, focuses on semiconductor nanowires. - Includes experts contributors who review the most important recent literature - Contains a broad view, including examination of semiconductor nanowires

Download or read book Wet Chemically Etched Silicon Nanowire Solar Cells Fabrication and Advanced Characterization written by Björn Hoffmann and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growth and Characterization of Thin Film Nanocrystalline Silicon Materials and Solar Cells written by Solomon Nwabueze Agbo and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semiconducting Silicon Nanowires for Biomedical Applications written by Jeffery L. Coffer and published by Woodhead Publishing. This book was released on 2021-09-14 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: In its second, extensively revised second edition, Semiconducting Silicon Nanowires for Biomedical Applications reviews the fabrication, properties, and biomedical applications of this key material. The book begins by reviewing the basics of growth, characterization, biocompatibility, and surface modification of semiconducting silicon nanowires. Attention then turns to use of these structures for tissue engineering and delivery applications, followed by detection and sensing. Reflecting the evolution of this multidisciplinary subject, several new key topics are highlighted, including our understanding of the cell-nanowire interface, latest advances in associated morphologies (including silicon nanoneedles and nanotubes for therapeutic delivery), and significantly, the status of silicon nanowire commercialization in biotechnology. Semiconducting Silicon Nanowires for Biomedical Applications is a comprehensive resource for biomaterials scientists who are focused on biosensors, drug delivery, and the next generation of nano-biotech platforms that require a detailed understanding of the cell-nanowire interface, along with researchers and developers in industry and academia who are concerned with nanoscale biomaterials, in particular electronically-responsive structures. - Reviews the growth, characterization, biocompatibility, and surface modification of semiconducting silicon nanowires - Describes silicon nanowires for tissue engineering and delivery applications, including cellular binding & internalization, tissue engineering scaffolds, mediated differentiation of stem cells, and silicon nanoneedles & nanotubes for delivery of small molecule / biologic-based therapeutics - Highlights the use of silicon nanowires for detection and sensing - Presents a detailed description of our current understanding of the cell-nanowire interface - Covers the current status of commercial development of silicon nanowire-based platforms

Download or read book Nanomaterials for Solar Cell Applications written by Sabu Thomas and published by Elsevier. This book was released on 2019-06-12 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials for Solar Cell Applications provides a review of recent developments in the field of nanomaterials based solar cells. It begins with a discussion of the fundamentals of nanomaterials for solar calls, including a discussion of lifecycle assessments and characterization techniques. Next, it reviews various types of solar cells, i.e., Thin film, Metal-oxide, Nanowire, Nanorod and Nanoporous materials, and more. Other topics covered include a review of quantum dot sensitized and perovskite and polymer nanocomposites-based solar cells. This book is an ideal resource for those working in this evolving field of nanomaterials and renewable energy. - Provides a well-organized approach to the use of nanomaterials for solar cell applications - Discusses the synthesis, characterization and applications of traditional and new material - Includes coverage of emerging nanomaterials, such as graphene, graphene-derivatives and perovskites

Download or read book Beyond CMOS Nanodevices 1 written by Francis Balestra and published by John Wiley & Sons. This book was released on 2014-06-02 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive review of the state-of-the-art in innovative Beyond-CMOS nanodevices for developing novel functionalities, logic and memories dedicated to researchers, engineers and students. It particularly focuses on the interest of nanostructures and nanodevices (nanowires, small slope switches, 2D layers, nanostructured materials, etc.) for advanced More than Moore (RF-nanosensors-energy harvesters, on-chip electronic cooling, etc.) and Beyond-CMOS logic and memories applications.

Download or read book Nanowires for Energy Applications written by and published by Academic Press. This book was released on 2018-06-05 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanowires for Energy Applications, Volume 98, covers the latest breakthrough research and exciting developments in nanowires for energy applications. This volume focuses on various aspects of Nanowires for Energy Applications, presenting interesting sections on Electrospun semiconductor metal oxide nanowires for energy and sensing applications, Integration into flexible and functional materials, Nanowire Based Bulk Heterojunction Solar Cells, Semiconductor Nanowires for Thermoelectric Generation, Energy Scavenging: Mechanical, Thermoelectric, and Nanowire synthesis/growth methods, and more. - Features the latest breakthroughs and research and development in nanowires for energy applications - Covers a broad range of topics, including a wide variety of materials and many important aspects of solar fuels - Includes in-depth discussions on materials design, growth and synthesis, engineering, characterization and photoelectrochemical studies