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On The Fracture Of Solar Grade Crystalline Silicon Wafer
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Book Synopsis On the Fracture of Solar Grade Crystalline Silicon Wafer by : Lv Zhao
Download or read book On the Fracture of Solar Grade Crystalline Silicon Wafer written by Lv Zhao and published by . This book was released on 2016 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: The profitability of silicon solar cells is a critical point for the PV market and it requires improved electrical performance, lower wafer production costs and enhancing reliability and durability of the cells. Innovative processes are emerging that provide thinner wafers with less raw material loss. But the induced crystallinity and distribution of defects compared to the classical wafers are unclear. It is therefore necessary to develop methods of microstructural and mechanical characterization to assess the rigidity and mechanical strength of these materials. In this work, 4-point bending tests were performed under quasi-static loading. This allowed to conduct both the stiffness estimation and the rupture study. A high speed camera was set up in order to track the fracture process thanks to a 45° tilted mirror. Fractographic analysis were performed using confocal optical microscope, scanning electron microscope and atomic force microscope. Electron Back-Scatter Diffraction and Laue X-Ray diffraction were used to explore the relationship between the microstructural grains orientations/textures of our material and the observed mechanical behavior. Jointly, finite element modeling and simulations were carried out to provide auxiliary characterization tools and help to understand the involved fracture mechanism. Thanks to the experiment-simulation coupled method, we have assessed accurately the rigidity of silicon wafers stemming from different manufacturing processes. A fracture origin identification strategy has been proposed combining high speed imaging and post-mortem fractography. Fracture investigations on silicon single crystals have highlighted the deflection free (110) cleavage path, the high initial crack velocity, the velocity dependent crack front shape and the onset of front waves in high velocity crack propagation. The investigations on the fracture of multi-crystalline wafers demonstrate a systematic transgranular cracking. Furthermore, thanks to twin multi-crystalline silicon plates, we have addressed the crack path reproducibility. A special attention has been paid to the nature of the cleavage planes and the grain boundaries barrier effect. Finally, based on these observations, an extended finite element model (XFEM) has been carried out which fairly reproduces the experimental crack path.
Book Synopsis Dynamic Fracture of Solar Grade Single Crystalline Silicon Wafers by : Meng Wang
Download or read book Dynamic Fracture of Solar Grade Single Crystalline Silicon Wafers written by Meng Wang and published by . This book was released on 2019 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crystalline silicon has attracted substantial attention for decades because of its large applications in solar cells and microelectromechanical systems. The high brittleness of silicon raises wide concerns since the failure of this semiconductor material increases the manufacturing cost and decreases the efficiency of the utilization of Si-based devices. Crack propagation of crystalline silicon is the main cause of catastrophic failure of silicon components. It has been intensively studied but is not fully understood yet due to intricate dynamic fracture behavior linked to small-scale phenomena. Therefore, the development of feasible methods to study the dynamic fracture, as well as the deeper understanding of fracture mechanism of crystalline silicon, are of paramount importance to improve the reliability and durability of Si-based systems for both industrial and scientific practitioners. In this work, dynamic fracture behavior of solar-grade single crystalline silicon wafers under mechanical loads was studied. We carried out fracture experiments on (001) silicon wafers using three-line or four-line bending apparatus under quasi-static loading. The entire fracture process was captured using a high-speed camera and was analyzed by the high-speed imaging technique. We studied the post-mortem fracture surface using a digital microscope, a laser scanning profilometer, as well as an atomic force microscope. The failure source of the silicon wafer was identified using fractographic analysis. Coupling the crack velocity measurement and fractographic analysis, we determined the crack front during dynamic crack propagation, which exhibits a velocity-dependent shape. We revealed the source of (110)-(111) cleavage plane deflection phenomena during high-speeding crack propagation under line-contact effects. Besides, jointly with the finite element simulations, we demonstrated how dynamics of the crack front is governed by the crystallographic direction-dependent dynamic fracture toughness. Finally, in comparison with the Wallner lines on the fracture surface, generated by linear perturbations of elastic waves on the crack front, we highlight the nucleation and strong nonlinear characteristics of out-of-plane corrugation waves, leaving specific markings that alter the surface roughness of asperity-free material.
Book Synopsis Resonance Ultrasonic Vibrations and Photoluminescence Mapping for Crack Detection in Crystalline Silicon Wafers and Solar Cells by : Andrii Monastyrskyi
Download or read book Resonance Ultrasonic Vibrations and Photoluminescence Mapping for Crack Detection in Crystalline Silicon Wafers and Solar Cells written by Andrii Monastyrskyi and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The solar energy, or photovoltaic (PV) industry, driven by economic competition with traditional fossil energy sources, strives to produce solar panels of the highest conversion efficiency and best reliability at the lowest production cost. Solar cells based on crystalline silicon are currently the dominant commercial PV technology by a large margin, and they are likely to remain dominant for at least one decade. The problem of improvement mechanical stability of silicon wafers and finished solar cell is one of the most critical for entire PV industry. Mechanical defects in wafer and cells in the form of periphery or internal cracks can be initiated at various steps of the manufacturing process and becomes the trigger for the fracture. There are a limited number of characterization methods for crack detection but only a few of those are able to satisfy PV industry needs in sensitivity of the crack detection incorporated with the analysis time. The most promising are a Resonance Ultrasonic Vibrations (RUV) technique and Photoluminescence (PL) imaging. The RUV method was further developed in this thesis project for fast non-destructive crack detection in full-size silicon wafers and solar cells. The RUV methodology relies on deviations of the resonance frequency response curve measured on a wafer with peripheral or bulk millimeter-length crack when it is compared with identical non-cracked wafers. It was observed that statistical variations of the RUV parameters on a similarly processed silicon wafers/cells with the same geometry lead to false positive events reducing accuracy of the RUV method. A new statistical approach using three independent RUV crack detection criteria was developed and applied to resolve this issue. This approach was validated experimentally. Crack detection using RUV technique was applied to a set of production-grade Cz-Si wafers and finished solar cells from the Isofoton's S.A. (Spain) production line. Cracked solar cells rejected by the RUV method using the statistical approach were imaged with room temperature PL mapping and independently controlled with Scanning Acoustic Microscopy (SAM). A comparison of three independent techniques for crack detection, RUV, PL and SAM, was performed on selected samples. A high accuracy and selectivity of the RUV method to identify mm-size cracks in wafers and cells was confirmed.
Book Synopsis Polycrystalline Silicon for Integrated Circuits and Displays by : Ted Kamins
Download or read book Polycrystalline Silicon for Integrated Circuits and Displays written by Ted Kamins and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycrystalline Silicon for Integrated Circuits and Displays, Second Edition presents much of the available knowledge about polysilicon. It represents an effort to interrelate the deposition, properties, and applications of polysilicon. By properly understanding the properties of polycrystalline silicon and their relation to the deposition conditions, polysilicon can be designed to ensure optimum device and integrated-circuit performance. Polycrystalline silicon has played an important role in integrated-circuit technology for two decades. It was first used in self-aligned, silicon-gate, MOS ICs to reduce capacitance and improve circuit speed. In addition to this dominant use, polysilicon is now also included in virtually all modern bipolar ICs, where it improves the basic physics of device operation. The compatibility of polycrystalline silicon with subsequent high-temperature processing allows its efficient integration into advanced IC processes. This compatibility also permits polysilicon to be used early in the fabrication process for trench isolation and dynamic random-access-memory (DRAM) storage capacitors. In addition to its integrated-circuit applications, polysilicon is becoming vital as the active layer in the channel of thin-film transistors in place of amorphous silicon. When polysilicon thin-film transistors are used in advanced active-matrix displays, the peripheral circuitry can be integrated into the same substrate as the pixel transistors. Recently, polysilicon has been used in the emerging field of microelectromechanical systems (MEMS), especially for microsensors and microactuators. In these devices, the mechanical properties, especially the stress in the polysilicon film, are critical to successful device fabrication. Polycrystalline Silicon for Integrated Circuits and Displays, Second Edition is an invaluable reference for professionals and technicians working with polycrystalline silicon in the integrated circuit and display industries.
Book Synopsis The Variational Approach to Fracture by : Blaise Bourdin
Download or read book The Variational Approach to Fracture written by Blaise Bourdin and published by Springer Science & Business Media. This book was released on 2008-04-19 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting original results from both theoretical and numerical viewpoints, this text offers a detailed discussion of the variational approach to brittle fracture. This approach views crack growth as the result of a competition between bulk and surface energy, treating crack evolution from its initiation all the way to the failure of a sample. The authors model crack initiation, crack path, and crack extension for arbitrary geometries and loads.
Book Synopsis Handbook of Photovoltaic Silicon by : Deren Yang
Download or read book Handbook of Photovoltaic Silicon written by Deren Yang and published by Springer. This book was released on 2019-11-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The utilization of sun light is one of the hottest topics in sustainable energy research. To efficiently convert sun power into a reliable energy – electricity – for consumption and storage, silicon and its derivatives have been widely studied and applied in solar cell systems. This handbook covers the photovoltaics of silicon materials and devices, providing a comprehensive summary of the state of the art of photovoltaic silicon sciences and technologies. This work is divided into various areas including but not limited to fundamental principles, design methodologies, wafering techniques/fabrications, characterizations, applications, current research trends and challenges. It offers the most updated and self-explanatory reference to all levels of students and acts as a quick reference to the experts from the fields of chemistry, material science, physics, chemical engineering, electrical engineering, solar energy, etc..
Book Synopsis Fundamentals of Microfabrication and Nanotechnology, Three-Volume Set by : Marc J. Madou
Download or read book Fundamentals of Microfabrication and Nanotechnology, Three-Volume Set written by Marc J. Madou and published by CRC Press. This book was released on 2018-12-14 with total page 1992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its third edition, Fundamentals of Microfabrication and Nanotechnology continues to provide the most complete MEMS coverage available. Thoroughly revised and updated the new edition of this perennial bestseller has been expanded to three volumes, reflecting the substantial growth of this field. It includes a wealth of theoretical and practical information on nanotechnology and NEMS and offers background and comprehensive information on materials, processes, and manufacturing options. The first volume offers a rigorous theoretical treatment of micro- and nanosciences, and includes sections on solid-state physics, quantum mechanics, crystallography, and fluidics. The second volume presents a very large set of manufacturing techniques for micro- and nanofabrication and covers different forms of lithography, material removal processes, and additive technologies. The third volume focuses on manufacturing techniques and applications of Bio-MEMS and Bio-NEMS. Illustrated in color throughout, this seminal work is a cogent instructional text, providing classroom and self-learners with worked-out examples and end-of-chapter problems. The author characterizes and defines major research areas and illustrates them with examples pulled from the most recent literature and from his own work.
Book Synopsis Manufacturing Techniques for Microfabrication and Nanotechnology by : Marc J. Madou
Download or read book Manufacturing Techniques for Microfabrication and Nanotechnology written by Marc J. Madou and published by CRC Press. This book was released on 2011-06-13 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed for science and engineering students, this text focuses on emerging trends in processes for fabricating MEMS and NEMS devices. The book reviews different forms of lithography, subtractive material removal processes, and additive technologies. Both top-down and bottom-up fabrication processes are exhaustively covered and the merits of the different approaches are compared. Students can use this color volume as a guide to help establish the appropriate fabrication technique for any type of micro- or nano-machine.
Download or read book Solar Energy Update written by and published by . This book was released on 1981-04 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polycrystalline Silicon for Integrated Circuit Applications by : Ted Kamins
Download or read book Polycrystalline Silicon for Integrated Circuit Applications written by Ted Kamins and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have seen silicon integrated circuits enter into an increasing number of technical and consumer applications, until they now affect everyday life, as well as technical areas. Polycrystalline silicon has been an important component of silicon technology for nearly two decades, being used first in MOS integrated circuits and now becoming pervasive in bipolar circuits, as well. During this time a great deal of informa tion has been published about polysilicon. A wide range of deposition conditions has been used to form films exhibiting markedly different properties. Seemingly contradictory results can often be explained by considering the details of the structure formed. This monograph is an attempt to synthesize much of the available knowledge about polysilicon. It represents an effort to interrelate the deposition, properties, and applications of polysilicon so that it can be used most effectively to enhance device and integrated-circuit perfor mance. As device performance improves, however, some of the proper ties of polysilicon are beginning to restrict the overall performance of integrated circuits, and the basic limitations of the properties of polysili con also need to be better understood to minimize potential degradation of circuit behavior.
Book Synopsis Solar PV Power by : Rabindra Kumar Satpathy
Download or read book Solar PV Power written by Rabindra Kumar Satpathy and published by Academic Press. This book was released on 2020-11-28 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar PV Power: Design, Manufacturing and Applications from Sand to Systems details developments in the solar cell manufacturing process, including information from system design straight through to the entire value chain of Solar PV Manufacturing. In addition, the book includes aspects of ground mounted grid connected solar PV systems and optimization for solar PV plants, economic analyses, and reliability and performance. The advances and processes of solar product technology and reliability, along with the performance of solar PV plants and operational and maintenance aspects with advance diagnostic techniques are also presented, making this an ideal resource. With rapid change in the manufacturing process, it is crucial for solar cells and solar PV modules to adapt to new developments in solar products, especially with regard to reliability, financial aspects and performance. Includes detailed solar panel module assembly and analysis Offers new concepts for solar PV system design that are presented alongside field related issues and examples Saves time and resources by collecting all pieces of information needed by engineers in the same text
Book Synopsis Ultra-thin Chip Technology and Applications by : Joachim Burghartz
Download or read book Ultra-thin Chip Technology and Applications written by Joachim Burghartz and published by Springer Science & Business Media. This book was released on 2010-11-18 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-thin chips are the "smart skin" of a conventional silicon chip. This book shows how very thin and flexible chips can be fabricated and used in many new applications in microelectronics, Microsystems, biomedical and other fields. It provides a comprehensive reference to the fabrication technology, post processing, characterization and the applications of ultra-thin chips.
Book Synopsis Properties of Crystalline Silicon by : Robert Hull
Download or read book Properties of Crystalline Silicon written by Robert Hull and published by IET. This book was released on 1999 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique and well-organized reference, this book provides illuminating data, distinctive insight and expert guidance on silicon properties.
Book Synopsis Introduction to Microfabrication by : Sami Franssila
Download or read book Introduction to Microfabrication written by Sami Franssila and published by John Wiley & Sons. This book was released on 2005-01-28 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microfabrication is the key technology behind integrated circuits,microsensors, photonic crystals, ink jet printers, solar cells andflat panel displays. Microsystems can be complex, but the basicmicrostructures and processes of microfabrication are fairlysimple. Introduction to Microfabrication shows how the commonmicrofabrication concepts can be applied over and over again tocreate devices with a wide variety of structures andfunctions. Featuring: * A comprehensive presentation of basic fabrication processes * An emphasis on materials and microstructures, rather than devicephysics * In-depth discussion on process integration showing how processes,materials and devices interact * A wealth of examples of both conceptual and real devices Introduction to Microfabrication includes 250 homework problems forstudents to familiarise themselves with micro-scale materials,dimensions, measurements, costs and scaling trends. Both researchand manufacturing topics are covered, with an emphasis on silicon,which is the workhorse of microfabrication. This book will serve as an excellent first text for electricalengineers, chemists, physicists and materials scientists who wishto learn about microstructures and microfabrication techniques,whether in MEMS, microelectronics or emerging applications.
Book Synopsis Sixteenth European Photovoltaic Solar Energy Conference by : H. Scheer
Download or read book Sixteenth European Photovoltaic Solar Energy Conference written by H. Scheer and published by Routledge. This book was released on 2020-11-25 with total page 3235 pages. Available in PDF, EPUB and Kindle. Book excerpt: The European Photovoltaic Solar Energy Conferences are dedicated to accelerating the impetus towards sustainable development of global PV markets. The 16th in the series, held in Glasgow UK, brought together more than 1500 delegates from 72 countries, and provided an important and vital forum for information exchange in the field. The Conference Proceedings place on record a new phase of market development and scientific endeavour in the PV industry, representing current and innovative thinking in all aspects of the science, technology, markets and business of photovoltaics. In three volumes, the Proceedings present some 790 papers selected for presentation by the scientific review committee of the 16th European Photovoltaic Solar Energy Conference. The comprehensive range of topics covered comprise: * Fundamentals, Novel Devices and New Materials * Thin Film Cells and Technologies * Space Cells and Systems * Crystalline Silicon Solar Cells and Technologies * PV Integration in Buildings * PV Modules and Components of PV Systems * Implementation, Strategies, National Programs and Financing Schemes * Market Deployment in Developing Countries These proceedings are an essential reference for all involved in the global PV industry- scientists, researchers, technologists and those with an interest in global market trends. The conference was organised by WIP-Renewable Energies, Munich, Germany.
Book Synopsis Summary of Flat-Plate Solar Array Project Documentation by : M. J. Phillips
Download or read book Summary of Flat-Plate Solar Array Project Documentation written by M. J. Phillips and published by . This book was released on 1986 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
