Analysis And Characterization Of Silicon Textured By Metal Assisted Etching Technique
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Analysis And Characterization Of Silicon Textured By Metal Assisted Etching Technique
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Author : Teck Kong Chong
language : en
Publisher:
Release Date : 2015
Analysis And Characterization Of Silicon Textured By Metal Assisted Etching Technique written by Teck Kong Chong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The efficient reflection suppression of a solar cell over a broad spectral range can be achieved by nano-scale surface textures. The fundamental reason is that the textured surface behaves like an effective medium with graded refractive index, resulting - in the optimal case - in vanishing reflectivity and appearing black under sunlight. The surface morphology is commonly known as "black Silicon" or bSi. Various methods for fabricating bSi have been developed such as reactive ion etching (RIE), metal-assisted etching (MAE) and laser texturing. MAE appears to be an interesting method because it is a flexible and potentially simple process for producing bSi. In fact, highly efficient bSi solar cells have been reported recently. Nevertheless, the energy conversion efficiency of these cells is still well below the highest achievable efficiencies. The high aspect ratio and surface area of the bSi can result in high rates of surface recombination, and therefore high values of Seff on the resulting structure. Nonetheless, no results of a systematic investigation of the correlation between optical performance, surface area increase and Seff in silicon have been reported to the best of author's knowledge. Another reason for the lower-than-optimal performance of the cells is the poor metal contact that contributes to the series resistance of the cell. Potential origins of this detrimental effect have only briefly been investigated through visual inspection, and measurements of the contact resistivity have not been made. In this thesis, an alternative 3-step MAE texturing technique which produces nanoporous silicon (MAE nSi) will be investigated using Silver (Ag) and Palladium (Pd) as catalyst. The thesis consists of two parts, namely experimental investigations and modelling. Both Ag and Pd are used to produce nano-scale structures. The optical properties of the nSi surfaces produced using these two metals are shown to be very similar. The majority of the work focuses on Ag due to the demonstrated superior electronic properties of the resulting samples. The investigation of Ag textured MAE nSi extends from basic optical performance to the effect on optical performance of high temperature process steps, initial surface roughness, the addition of a dielectric coating and encapsulation. In addition, the surface passivation and contact quality of Aluminium evaporated contacts on the nS surfaces are investigated. Optical modelling of MAE nSi provides greater insight into the light propagation behaviour of the structure. In this case, focus ion beam (FIB) has been used to acquire SEM images of the surface morphology. The reconstructed surface was then imported into GDCalc software for calculating the reflectance and transmittance matrices which can then be used to further analysis. Light propagation inside the bulk can then be calculated using an incoherent model. The modelling results were then compared to experimental results and also an ideal Lambertian model. Finally the generation profile was obtained. The generation profile is useful for investigating the potential efficiency of a solar cell.
Improved Metal Assisted Chemical Etching Method For Uniform Vertical And Deep Silicon Structure
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Author :
language : en
Publisher:
Release Date : 2017
Improved Metal Assisted Chemical Etching Method For Uniform Vertical And Deep Silicon Structure written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Photovoltaic Manufacturing
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Author : Monika Freunek Muller
language : en
Publisher: John Wiley & Sons
Release Date : 2021-08-16
Photovoltaic Manufacturing written by Monika Freunek Muller and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-16 with Science categories.
PHOTOVOLTAIC MANUFACTURING This book covers the state-of-the-art and the fundamentals of silicon wafer solar cells manufacturing, written by world-class researchers and experts in the field. High quality and economic photovoltaic manufacturing is central to realizing reliable photovoltaic power supplies at reasonable cost. While photovoltaic silicon wafer manufacturing is at a mature, industrial and mass production stage, knowing and applying the fundamentals in solar manufacturing is essential to anyone working in this field. This is the first book on photovoltaic wet processing for silicon wafers, both mono- and multi-crystalline. The comprehensive book provides information for process, equipment, and device engineers and researchers in the solar manufacturing field. The authors of the chapters are world-class researchers and experts in their field of endeavor. The fundamentals of wet processing chemistry are introduced, covering etching, texturing, cleaning and metrology. New developments, innovative approaches, as well as current challenges are presented. Benefits of reading the book include: The book includes a detailed discussion of the important new development of black silicon, which is considered to have started a new wave in photovoltaics and become the new standard while substantially lowering the cost. Photovoltaics are central to any country’s “New Green Deal” and this book shows how to manufacture competitively. The book’s central goal is to show photovoltaic manufacturing can be done with enhanced quality and lowering costs. Audience Engineers, chemists, physicists, process technologists, in both academia and industry, that work with photovoltaics and their manufacture.
Handbook Of Silicon Based Mems Materials And Technologies
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Author : Markku Tilli
language : en
Publisher: Elsevier
Release Date : 2020-04-17
Handbook Of Silicon Based Mems Materials And Technologies written by Markku Tilli and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-17 with Technology & Engineering categories.
Handbook of Silicon Based MEMS Materials and Technologies, Third Edition is a comprehensive guide to MEMS materials, technologies, and manufacturing with a particular emphasis on silicon as the most important starting material used in MEMS. The book explains the fundamentals, properties (mechanical, electrostatic, optical, etc.), materials selection, preparation, modeling, manufacturing, processing, system integration, measurement, and materials characterization techniques of MEMS structures. The third edition of this book provides an important up-to-date overview of the current and emerging technologies in MEMS making it a key reference for MEMS professionals, engineers, and researchers alike, and at the same time an essential education material for undergraduate and graduate students. Provides comprehensive overview of leading-edge MEMS manufacturing technologies through the supply chain from silicon ingot growth to device fabrication and integration with sensor/actuator controlling circuits Explains the properties, manufacturing, processing, measuring and modeling methods of MEMS structures Reviews the current and future options for hermetic encapsulation and introduces how to utilize wafer level packaging and 3D integration technologies for package cost reduction and performance improvements Geared towards practical applications presenting several modern MEMS devices including inertial sensors, microphones, pressure sensors and micromirrors
Silicon And Silicide Nanowires
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Author : Yu Huang
language : en
Publisher: CRC Press
Release Date : 2016-04-19
Silicon And Silicide Nanowires written by Yu Huang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-19 with Science categories.
Nanoscale materials are showing great promise in various electronic, optoelectronic, and energy applications. Silicon (Si) has especially captured great attention as the leading material for microelectronic and nanoscale device applications. Recently, various silicides have garnered special attention for their pivotal role in Si device engineering
Advanced Photonics Metasurfaces Design Fabrication And Applications
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Author : Xufeng Jing
language : en
Publisher: Frontiers Media SA
Release Date : 2021-07-15
Advanced Photonics Metasurfaces Design Fabrication And Applications written by Xufeng Jing and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-07-15 with Science categories.
Electrochemistry Of Silicon
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Author : Volker Lehmann
language : en
Publisher: Wiley-VCH
Release Date : 2002-04-22
Electrochemistry Of Silicon written by Volker Lehmann and has been published by Wiley-VCH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-04-22 with Science categories.
Silicon has been and will most probably continue to be the dominant material in semiconductor technology. Although the defect-free silicon single crystal is one of the best understood systems in materails science, its electrochemistry to many people is still a kind of "alchemy". This view is partly due to the interdisciplinary aspects of the topic: Physics meets chemistry at the silicon-electrolyte interface. This book gives a comprehensive overview of this important aspect of silicon technology as well as examples of applications ranging from photonic crystals to biochips. It will serve materials scientists as well as engineers involved in silicon technology as a quick reference with its more than 150 technical tables and diagrams and ca. 1000 references cited for easy access of the original literature.
Nanomaterials For Solar Cell Applications
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Author : Sabu Thomas
language : en
Publisher: Elsevier
Release Date : 2019-06-12
Nanomaterials For Solar Cell Applications written by Sabu Thomas and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-06-12 with Technology & Engineering categories.
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
Metal Impurities In Silicon Device Fabrication
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Author : Klaus Graff
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-08
Metal Impurities In Silicon Device Fabrication written by Klaus Graff and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-08 with Technology & Engineering categories.
A discussion of the different mechanisms responsible for contamination together with a survey of their impact on device performance. The author examines the specific properties of main and rare impurities in silicon, as well as the detection methods and requirements in modern technology. Finally, impurity gettering is studied along with modern techniques to determine gettering efficiency. Throughout all of these subjects, the book presents only reliable and up-to-date data so as to provide a thorough review of recent scientific investigations.
Handbook Of Porous Silicon
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Author : Leigh Canham
language : en
Publisher: Springer
Release Date : 2021-01-14
Handbook Of Porous Silicon written by Leigh Canham and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-14 with Technology & Engineering categories.
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.