Light Trapping For Thin Silicon Solar Cells By Femtosecond Laser Texturing
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Light Trapping For Thin Silicon Solar Cells By Femtosecond Laser Texturing
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Author :
language : en
Publisher:
Release Date : 2012
Light Trapping For Thin Silicon Solar Cells By Femtosecond Laser Texturing written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Lasers categories.
Femtosecond laser texturing is used to create nano- to micron-scale surface roughness that strongly enhances light-trapping in thin crystalline silicon solar cells. Light trapping is crucial for thin solar cells where a single light-pass through the absorber is insufficient to capture the weakly absorbed red and near-infrared photons, especially with an indirect-gap semiconductor absorber layer such as crystalline Si which is less than 20 um thick. We achieve enhancement of the optical absorption from light-trapping that approaches the Yablonovitch limit.
Femtosecond Laser Hyperdoping And Texturing Of Silicon For Photovoltaic Applications
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Author : Yu-Ting Lin
language : en
Publisher:
Release Date : 2014
Femtosecond Laser Hyperdoping And Texturing Of Silicon For Photovoltaic Applications written by Yu-Ting Lin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
This dissertation explores strategies for improving photolvoltaic efficiency and reducing cost using femtosecond-laser processing methods including surface texturing and hyperdoping. Our investigations focus on two aspects: 1) texturing the silicon surface to create efficient light-trapping for thin silicon solar cells, and 2) understanding the mechanism of hyperdoping to control the doping profiles for fabricating efficient intermediate band materials.
Anti Reflection And Light Trapping In C Si Solar Cells
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Author : Chetan Singh Solanki
language : en
Publisher: Springer
Release Date : 2017-06-30
Anti Reflection And Light Trapping In C Si Solar Cells written by Chetan Singh Solanki and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-30 with Technology & Engineering categories.
This book offers essential insights into c-Si based solar cells and fundamentals of reflection, refraction, and light trapping. The basic physics and technology for light trapping in c-Si based solar cells are covered, from traditional to advanced light trapping structures. Further, the book discusses the latest developments in plasmonics for c-Si solar cell applications, along with their future scope and the requirements for further research. The book offers a valuable guide for graduate students, researchers and professionals interested in the latest trends in solar cell technologies.
Introduction To Light Trapping In Solar Cell And Photo Detector Devices
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Author : Stephen J. Fonash
language : en
Publisher: Elsevier
Release Date : 2014-09-15
Introduction To Light Trapping In Solar Cell And Photo Detector Devices written by Stephen J. Fonash and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-15 with Technology & Engineering categories.
New Approaches to Light Trapping in Solar Cell Devices discusses in detail the use of photonic and plasmonic effects for light trapping in solar cells. It compares and contrasts texturing, the current method of light-trapping design in solar cells, with emerging approaches employing photonic and plasmonic phenomena. These new light trapping methods reduce the amount of absorber required in a solar cell, promising significant cost reduction and efficiency. This book highlights potential advantages of photonics and plasmonics and describes design optimization using computer modeling of these approaches. Its discussion of ultimate efficiency possibilities in solar cells is grounded in a review of the Shockley-Queisser analysis; this includes an in-depth examination of recent analyses building on that seminal work.
Light Trapping In Thin Crystalline Silicon Solar Cells
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Author : James A. Rand
language : en
Publisher:
Release Date : 1990
Light Trapping In Thin Crystalline Silicon Solar Cells written by James A. Rand and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Silicon categories.
Solar Cells
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Author : Ahmed Mourtada Elseman
language : en
Publisher: BoD – Books on Demand
Release Date : 2021-09-22
Solar Cells written by Ahmed Mourtada Elseman and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-22 with Technology & Engineering categories.
Solar cell energy is the single most pressing issue facing humanity, with a more technologically advanced society requiring better energy resources. This book discusses technologies broadly, depending on how they capture and distribute solar energy or convert it into solar power. The major areas covered in this book are: • The theory of solar cells, which explains the conversion of light energy in photons into electric current. The theoretical studies are practical because they predict the fundamental limits of a solar cell. • The design and development of thin-film technology-based solar cells. • State of the art for bulk material applied for solar cells based on crystalline silicon (c-Si), also known as “solar grade silicon,” and emerging photovoltaics.
Light Trapping In Thin Film Silicon Solar Cells On Plastic Substrates
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Author : M. M. de Jong
language : en
Publisher:
Release Date : 2013
Light Trapping In Thin Film Silicon Solar Cells On Plastic Substrates written by M. M. de Jong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Texturization And Light Trapping In Silicon Solar Cells
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Author : U. Gangopadhyay
language : en
Publisher:
Release Date : 2009
Texturization And Light Trapping In Silicon Solar Cells written by U. Gangopadhyay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Photovoltaic power generation categories.
Reduction of optical losses in both mono and multicrystalline silicon solar cells by surface texturing is one of the important issues of modern silicon photovoltaics. Texturing of the front surface of silicon solar cells has been modeled and analysed with reference to the reduction in reflection co-efficient and increase in optical trapping. Significant enhancement in open circuit voltage and short circuit current has been achieved through such texturing of the front surface of mono-silicon solar cells. A proper optimisation of texture angle appears to be important for the best performance of the solar cells. An alternative way of reducing the surface reflection and enhancement of the cell parameters is to produce to passive front surface porous silicon layer. An analysis of the characteristics of a porous silicon layer shows that the morphology of the layer is an important design parameter. To realise the structures in practice, several methods are available, but many of this method are either not cost effective or commercially non available. In order to achieve good uniformity of pyramidal textured structure of the silicon surface, a mixture of NaOH/KOH and isopropyl alcohol (IPA) is generally used for texturization of mono crystalline solar cells. However, due to high cost of IPA, there is always search for alternative source. This source should not only be cost effective but should also result in reduced interfacial energy between silicon and ionised electrolyte chemical solution to achieve sufficient wet-ability for the silicon surface in order to enhance pyramid nucleation. Different novel texturization techniques for monocrystalline silicon are descried in this chapter including solar cells performance. For multicrystalline silicon (mc-Si) solar cells, the standard alkaline solution of NaOH/KOH does not produced textured surface of good quality so as to give satisfactory open circuit voltage and efficiency. This is because of grain boundary delineation with step formed between successive grains of different orientations. Different novel texturization techniques for multicrystalline silicon are also included in this book including solar cells performance.
Light Trapping In Monocrystalline Silicon Solar Cells Using Random Upright Pyramids
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Author : Salman Manzoor
language : en
Publisher:
Release Date : 2014
Light Trapping In Monocrystalline Silicon Solar Cells Using Random Upright Pyramids written by Salman Manzoor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Light absorption categories.
Crystalline silicon has a relatively low absorption coefficient, and therefore, in thin silicon solar cells surface texturization plays a vital role in enhancing light absorption. Texturization is needed to increase the path length of light through the active absorbing layer. The most popular choice for surface texturization of crystalline silicon is the anisotropic wet-etching that yields pyramid-like structures. These structures have shown to be both simple to fabricate and efficient in increasing the path length; they outperform most competing surface texture. Recent studies have also shown these pyramid-like structures are not truly square-based 54.7 degree pyramids but have variable base angles and shapes. In addition, their distribution is not regular -- as is often assumed in optical models -- but random. For accurate prediction of performance of silicon solar cells, it is important to investigate the true nature of the surface texture that is achieved using anisotropic wet-etching, and its impact on light trapping. We have used atomic force microscopy (AFM) to characterize the surface topology by obtaining actual height maps that serve as input to ray tracing software. The height map also yields the base angle distribution, which is compared to the base angle distribution obtained by analyzing the angular reflectance distribution measured by spectrophotometer to validate the shape of the structures. Further validation of the measured AFM maps is done by performing pyramid density comparison with SEM micrograph of the texture. Last method employed for validation is Focused Ion Beam (FIB) that is used to mill the long section of pyramids to reveal their profile and so from that the base angle distribution is measured. After that the measured map is modified and the maps are generated keeping the positional randomness (the positions of pyramids) and height of the pyramids the same, but changing their base angles. In the end a ray tracing software is used to compare the actual measured AFM map and also the modified maps using their reflectance, transmittance, angular scattering and most importantly path length enhancement, absorbance and short circuit current with lambertian scatterer.
Sustainable Materials And Manufacturing Technologies
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Author : Navneet Khanna
language : en
Publisher: CRC Press
Release Date : 2023-02-27
Sustainable Materials And Manufacturing Technologies written by Navneet Khanna and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-02-27 with Technology & Engineering categories.
Materials and manufacturing techniques are a few of the vital processes in production industries. Most of the materials processing and manufacturing techniques currently used in industries are a major cause of environmental pollution and are hence unsustainable. This book provides in-depth knowledge about challenges faced during the processing of advanced materials and discusses possible ways to achieve sustainability in manufacturing. This book: Covers advances in cryogenic machining, optimization, and economical and energy assessment of machining Provides case studies and numerical design with analysis using computational fluid dynamics of minimum quantity lubrication mist droplets Reviews metalworking fluids, laser micro-texturing, materials and manufacturing in sustainability, biofuels additives, nano-materials, and additive manufacturing of waste plastic Explores the use of artificial intelligence and machine learning-based manufacturing techniques; and Covers the latest challenges and future trends in sustainable manufacturing Sustainable Materials and Manufacturing Technologies is primarily written for senior undergraduate and graduate students, as well as researchers in mechanical, manufacturing, industrial, and production engineering, and material science.
