Stability Issues in Sputtered CdS/CdTe Solar Cells PDF Download
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Author: Naba Raj Paudel
Publisher:
ISBN:
Category : Photovoltaic cells
Languages : en
Pages : 180
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Book Description
Author: Naba Raj Paudel
Publisher:
ISBN:
Category : Photovoltaic cells
Languages : en
Pages : 180
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Book Description
Author: Faming Shen
Publisher:
ISBN:
Category : Solar cells
Languages : en
Pages : 94
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Book Description
Author: Victor Plotnikov
Publisher:
ISBN:
Category : Magnetrons
Languages : en
Pages : 212
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Book Description
CdTe is a nearly perfect absorber material for second generation polycrystalline solar cells because the bandgap closely matches the peak of the solar spectrum, relatively high absorption coefficient and good electronic properties in the polycrystalline phase. Fabricating high-efficiency CdS/CdTe solar cells with an ultra-thin absorber layer is a challenging yet highly desirable step in improving CdTe technology. Most of today's CdTe solar cells utilize an absorber layer which is about 2.5 microns to 8 microns thick. Thinning this layer down typically results in poorer cell performance due to shunting, incomplete photon absorption, fully depleted CdTe layer or interference between the main and the back contact junction when the CdTe layer thickness approaches a certain limit. While some of these losses are fundamental, others can be minimized by careful optimization of the fabrication steps. In this dissertation I present the results of such optimization. Magnetron sputtered CdS/CdTe solar cells with the absorber layer thicknesses from 2.6 microns to 0.3 microns were studied. The deposition process itself and all the post-deposition parameters such as the CdCl2 treatment, thickness of the Cu layer in the thermally evaporated Cu/Au back contact, and the back contact thermal activation/diffusion time for a given CdTe layer thickness were optimized to achieve the top performance for the cell of a given thickness. 13.5 % efficiency cells with 2.5 microns CdTe, 12% cells with 1 microns CdTe, 9.7% cells with 0.5 microns CdTe and 6.7% with 0.3 microns CdTe were fabricated.
Author: Arvind Shah
Publisher: Springer Nature
ISBN: 3030464873
Category : Science
Languages : en
Pages : 357
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Book Description
This book gives a comprehensive introduction to the field of photovoltaic (PV) solar cells and modules. In thirteen chapters, it addresses a wide range of topics including the spectrum of light received by PV devices, the basic functioning of a solar cell, and the physical factors limiting the efficiency of solar cells. It places particular emphasis on crystalline silicon solar cells and modules, which constitute today more than 90 % of all modules sold worldwide. Describing in great detail both the manufacturing process and resulting module performance, the book also touches on the newest developments in this sector, such as Tunnel Oxide Passivated Contact (TOPCON) and heterojunction modules, while dedicating a major chapter to general questions of module design and fabrication. Overall, it presents the essential theoretical and practical concepts of PV solar cells and modules in an easy-to-understand manner and discusses current challenges facing the global research and development community.
Author: Alan Fahrenbruch
Publisher: Elsevier
ISBN: 0323145388
Category : Technology & Engineering
Languages : en
Pages : 580
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Book Description
Fundamentals of Solar Cells: Photovoltaic Solar Energy Conversion provides an introduction to the fundamental physical principles of solar cells. It aims to promote the expansion of solar photovoltaics from relatively small and specialized use to a large-scale contribution to energy supply. The book begins with a review of basic concepts such as the source of energy, the role of photovoltaic conversion, the development of photovoltaic cells, and sequence of phenomena involved in solar power generation. This is followed by separate chapters on each of the processes that take place in solar cell. These include solar input; properties of semiconductors; recombination and the flow of photogenerated carriers; charge separation and the characteristics of junction barriers; and calculation of solar efficiency. Subsequent chapters deal with the operation of specific solar cell devices such as a single-crystal homojunction (Si); a single-crystal-heterojunction/buried-homojunction (AlGaAs/GaAs); and a polycrystalline, thin-film cell (CuxS/CdS). This book is intended for upper-level graduate students who have a reasonably good understanding of solid state physics and for scientists and engineers involved in research and development of solar cells.
Author: Xu Wang
Publisher:
ISBN:
Category : Aluminum-zinc alloys
Languages : en
Pages : 146
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Book Description
Author: Vijay Viswanathan
Publisher:
ISBN:
Category : Cadmium sulfide photoconductive cells
Languages : en
Pages : 134
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Book Description
Author:
Publisher: DIANE Publishing
ISBN: 142891787X
Category : Photovoltaic power generation
Languages : en
Pages : 335
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Book Description
Author:
Publisher:
ISBN:
Category : Cadmium sulfide
Languages : en
Pages : 6
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Book Description
A CdSxTe1-x layer forms by interdiffusion of CdS and CdTe during the fabrication of thin-film CdTe photovoltaic (PV) devices. The CdSxTe1-x layer is thought to be important because it relieves strain at the CdS/CdTe interface that would otherwise exist due to the 10% lattice mismatch between these two materials. Our previous work has indicated that the electrical junction is located in this interdiffused CdSxTe1-x region. Further understanding, however, is essential to predict the role of this CdSxTe1-x layer in the operation of CdS/CdTe devices. In this study, CdSxTe1-x alloy films were deposited by RF magnetron sputtering and co-evaporation from CdTe and CdS sources. Both radio-frequency-magnetron-sputtered and co-evaporated CdSxTe1-x films of lower S content (x
Author: Brahim Attaf
Publisher: BoD – Books on Demand
ISBN: 9533072350
Category : Technology & Engineering
Languages : en
Pages : 664
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Book Description
Due to their good mechanical characteristics in terms of stiffness and strength coupled with mass-saving advantage and other attractive physico-chemical properties, composite materials are successfully used in medicine and nanotechnology fields. To this end, the chapters composing the book have been divided into the following sections: medicine, dental and pharmaceutical applications; nanocomposites for energy efficiency; characterization and fabrication, all of which provide an invaluable overview of this fascinating subject area. The book presents, in addition, some studies carried out in orthopedic and stomatological applications and others aiming to design and produce new devices using the latest advances in nanotechnology. This wide variety of theoretical, numerical and experimental results can help specialists involved in these disciplines to enhance competitiveness and innovation.
