Download or read book Development of High Efficiency RTP Multicrystalline Silicon Solar Cells written by A. Rohatgi and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of High Efficiency Solar Cells on HEM Multicrystalline Silicon written by A. Rohatgi and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photovoltaic Energy Program Contract Summary Fiscal Year 2000 written by and published by DIANE Publishing. This book was released on 2001 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Material Properties and Efficiency Limits of Compensated and Multicrystalline Silicon for Solar Cells written by Florian Schindler and published by . This book was released on 2016-07-20 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing the efficiency and reducing the production costs are the two main goals of the optimization of crystalline silicon solar cells. This thesis addresses the impact of efficiency- limiting defects in crystalline silicon from cheaper production routes, namely upgraded metallurgical grade silicon and multicrystalline silicon, and presents an approach for the fabrication of high efficiency solar cells on low-cost multicrystalline silicon substrate. Upgraded metallurgical grade silicon typically features significant amounts of both types of dopants, acceptors and donors, which leads to a so-called charge carrier compensation. The impact of compensation on charge carrier mobility is investigated and a unified model for charge carrier mobilities in uncompensated and compensated silicon is developed. Multicrystalline silicon features structural crystal defects, such as grain boundaries and dislocations, as well as a large amount of metal impurities incorporated from the crucible system into the silicon during crystallization. In this thesis, efficiency losses due to impurities from the crucible system are quantified, the role of the doping type is evaluated, and the efficiency limit for solar cells based on high performance multicrystalline silicon substrate is assessed.
Download or read book Development of High efficiency Solar Cells on Thin Silicon Through Design Optimization and Defect Passivation written by Manav Sheoran and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall goal of this research is to improve fundamental understanding of the hydrogen passivation of defects in low-cost silicon and the fabrication of high-efficiency solar cells on thin crystalline silicon through low-cost technology development. A novel method was developed to estimate the flux of hydrogen, released from amorphous silicon nitride film, into the silicon. Rapid-firing-induced higher flux of hydrogen was found to be important for higher defect passivation. This was followed by the fabrication of solar cell efficiencies of ~ 17% on low-cost, planar cast multicrystalline silicon. Solar cell efficiencies and lifetime enhancement in the top, middle, and bottom regions of cast multicrystalline silicon ingots were explained on the basis of impurities and defects generally found in those regions. In an attempt to further reduce the cost, high-efficiency solar cells were fabricated on thin crystalline silicon wafers with full area aluminum-back surface field. In spite of loss in efficiency, wafer thinning reduced the module cost. Device modeling was performed to establish a roadmap towards high-efficiency thin cells and back surface recombination velocity and back surface reflectance were identified as critical parameters for high-efficiency thin cells. Screen-printed solar cells on float zone material, with efficiencies> 19% on 300 Îơm and> 18% on 140 Îơm were fabricated using a novel low-cost fabrication sequence that involved dielectric rear passivation along with local contacts and back surface field.
Download or read book Advances in Silicon Solar Cells written by Shadia Ikhmayies and published by Springer. This book was released on 2018-01-10 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a review of all types of silicon solar cells. The scope includes monocrocrystalline Si solar cells, polycrystalline and amorphous thin-film silicon solar cells, and tandem solar cells. Production, treatment and development of these devices are reviewed. Limitations of these devices, design optimization, testing and fabrication methods are covered. In addition, current status and future prospects for the further development of silicon solar cells are addressed. Special emphasis is given to methods of attaining high efficiency and thereby cost-effective solar power. The aim of the book is to provide the reader with a complete overview about the recent advances in the structure and technology of all generations of silicon solar cells.
Download or read book Development of High efficiency Solar Cells on Silicon WEB written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High efficiency Multicrystalline Silicon Solar Cells written by and published by . This book was released on 2005 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Efficiency Silicon Solar Cells written by Martin A. Green and published by Trans Tech Publications Ltd. This book was released on 1987-01-01 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early chapters comprehensively review the optical and transport properties of silicon. Light trapping is described in detail. Limits on the efficiency of silicon cells are discussed as well as material requirements necessary to approach these limits. The status of current approaches to passifying surfaces, contacts and bulk regions is reviewed. The final section of the book describes the most practical approaches to the fabrication of high-efficiency cells capable of meeting the efficiency targets for both concentrated and non-concentrated sunlight, including a discussion of design and processing approaches for non-crystalline silicon.
Download or read book Fiscal Year 1998 Budget Authorization Request written by United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment and published by . This book was released on 1999 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Efficiency Crystalline Silicon Solar Cells written by Eun-Chel Cho and published by MDPI. This book was released on 2021-01-06 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is composed of 6 papers. The first paper reports a novel technique for the selective emitter formation by controlling the surface morphology of Si wafers. Selective emitter (SE) technology has attracted renewed attention in the Si solar cell industry to achieve an improved conversion efficiency of passivated-emitter rear-contact (PERC) cells. In the second paper, the temperature dependence of the parameters was compared through the PERC of the industrial-scale solar cells. As a result of their analysis, PERC cells showed different temperature dependence for the fill factor loss as temperatures rose. The third paper reports the effects of carrier selective front contact layer and defect state of hydrogenated amorphous silicon passivation layer/n-type crystalline silicon interface. The results demonstrated the effects of band offset determined by band bending at the interface of the passivation layer and carrier selective front contact layer. In addition, the nc-SiOx: H CSFC layer not only reduces parasitic absorption loss but also has a tunneling effect and field-effect passivation. The fourth paper reports excimer laser annealing of hydrogenated amorphous silicon film for TOPCon solar cell application. This paper analyzes the crystallization of a-Si:H via excimer laser annealing (ELA) and compared this process with conventional thermal annealing. The fifth paper reports the contact mechanism between Ag–Al and Si and the change in contact resistance (Rc) by varying the firing profile. Rc was measured by varying the belt speed and peak temperature of the fast-firing furnace. The sixth paper reports a silicon tandem heterojunction solar cell based on a ZnO/Cu2O subcell and a c-Si bottom subcell using electro-optical numerical modeling. The buffer layer affinity and mobility together with a low conduction band offset for the heterojunction are discussed, as well as spectral properties of the device model.
Download or read book Development of High Efficiency Monocrystalline Silicon Solar Cells Through Improved Optical and Electrical Confinement written by Vichai Meemongkolkiat and published by ProQuest. This book was released on 2008 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis is to understand and improve optical and electrical confinement to achieve cost-effective high-efficiency thin p-type Si solar cells. Optical confinement is achieved by front surface texturing in conjunction with an internal reflective layer on the back surface. Electrical confinement is obtained through the use of a high-lifetime material coupled with high-quality passivation on both surfaces.
Download or read book High Efficiency Multicrystalline Silicon Solar Cells written by Matthew Justin Stocks and published by . This book was released on 1998 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Efficiency Solar Cells written by Xiaodong Wang and published by Springer Science & Business Media. This book was released on 2013-11-01 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the effort to increase the contribution of solar cells (photovoltaics) to our energy mix, this book addresses three main areas: making existing technology cheaper, promoting advanced technologies based on new architectural designs, and developing new materials to serve as light absorbers. Leading scientists throughout the world create a fundamental platform for knowledge sharing that combines the physics, materials, and device architectures of high-efficiency solar cells. While providing a comprehensive introduction to the field, the book highlights directions for further research, and is intended to stimulate readers’ interest in the development of novel materials and technologies for solar energy applications.
Download or read book Technology Development for High Efficiency Solar Cells and Modules Using Thin written by and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Final technical progress report of Crystal Solar subcontract NEU-31-40054-01. The objective of this 18-month program was to demonstrate the viability of high-efficiency thin (less than 80 um) monocrystalline silicon (Si) solar cells and modules with a low-cost epitaxial growth process.
Download or read book Processes for Producing Low Cost High Efficiency Silicon Solar Cells written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Processes which utilize rapid thermal processing (RTP) are provided for inexpensively producing high efficiency silicon solar cells. The RTP processes preserve minority carrier bulk lifetime .tau. and permit selective adjustment of the depth of the diffused regions, including emitter and back surface field (bsf), within the silicon substrate. In a first RTP process, an RTP step is utilized to simultaneously diffuse phosphorus and aluminum into the front and back surfaces, respectively, of a silicon substrate. Moreover, an in situ controlled cooling procedure preserves the carrier bulk lifetime .tau. and permits selective adjustment of the depth of the diffused regions. In a second RTP process, both simultaneous diffusion of the phosphorus and aluminum as well as annealing of the front and back contacts are accomplished during the RTP step. In a third RTP process, the RTP step accomplishes simultaneous diffusion of the phosphorus and aluminum, annealing of the contacts, and annealing of a double-layer antireflection/passivation coating SiN/SiO.sub.x. In a fourth RTP process, the process of applying front and back contacts is broken up into two separate respective steps, which enhances the efficiency of the cells, at a slight time expense. In a fifth RTP process, a second RTP step is utilized to fire and adhere the screen printed or evaporated contacts to the structure.
Download or read book Crystalline Silicon Solar Cells written by Adolf Goetzberger and published by Wiley. This book was released on 1998-04-08 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: As environmental concerns escalate, solar power is increasingly seen as an attractive alternative energy source. Crystalline Silicon Solar Cells addresses the practical and theoretical issues fundamental to the viable conversion of sunlight into electricity. Written by three internationally renowned experts, this valuable reference profits from results and experience gained from research at the Fraunhofer Institute for Solar Energy Systems. Features include: Introduction to the principles of photovoltaics, providing a grounding in semiconductor physics for the novice reader Special emphasis on the methods of attaining high efficiency and thereby cost-effective solar power Examination of the physics, design and technology of crystalline silicon solar cells, in particular thin film cells Survey of a selection of alternative cell types equipping the reader with a complete overview Detailed description of measuring and analysis techniques to facilitate determining physical semiconductor and solar cell parameters Accessible to those with a basic knowledge of physics and mathematics, this is an excellent introductory book for students studying solid state and semiconductor physics. All those working in photovoltaic development and production will find Crystalline Silicon Solar Cells an indispensable resource.
