Download or read book Gallium Arsenide Solar Cells on Single Crystalline Silicon Substrates written by Hossein Firouzi and published by . This book was released on 1986 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preparation of Silicon Substrates for Gallium Arsenide Solar Cells written by and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a process and structure for the fabrication of high-efficiency GaAs-GaAlAs heteroface solar cells. A GaAs- GaAlAs solar cell with AM1 efficiency greater than 20% has been fabricated on a single-crystal GaAs substrate, and a GaAs-GaAlAs solar cell showing high open-circuit voltage has been fabricated on a single-crystal bulk-Ge substrate.

Download or read book Thin films of gallium arsenide on low cost substrates written by Rockwell International. Electronics Research Center and published by . This book was released on 1979 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preparation of Silicon Substrates for Gallium Arsenide Solar Cells by Electron Beam Pulse Processing written by Stephen P. Tobin and published by . This book was released on 1981 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past year we have developed a process for creating high-quality epitaxial layers of germanium on silicon substrates using rapid heating and cooling with a pulsed electron beam. This single-crystal germanium coating is the key to the production of high efficiency Ga-As solar cells on low-cost silicon substrates in an economical manner.

Download or read book Thin Films of Gallium Arsenide on Low cost Substrates written by Ralph Powers Ruth and published by . This book was released on 1980 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thin films of gallium arsenide on low cost substrates written by and published by . This book was released on 1976 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gallium Arsenide and Multibandgap Solar Cell Research written by S. M. Vernon and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report covers the first six months of research on high-efficiency, low-cost solar cells. The basic approach involved the heteroepitaxial growth of a III-V compound material onto a single-crystal silicon wafer. The growth technique employed was metal-organic chemical vapor deposition (MO-CVD) in an atmospheric pressure reactor. The silicon wafer may be a mechanical substrate and ohmic contact for a single-junction device, or it may contain a p-n junction of its own as the bottom cell of a two-junction, tandem device. The III-V single-junction cell mateial is GaAs and the two-junction material is either GaAlAs or GaAsP; either material could yield a band gap of about 1.7eV. Single-crystal films of Ge, deposited onto silicon wafers by CVD, are also being studied.

Download or read book Thin Film Crystalline Silicon Solar Cells written by Rolf Brendel and published by John Wiley & Sons. This book was released on 2011-02-15 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introduction to the physics of silicon solar cells focuses on thin cells, while reviewing and discussing the current status of the important technology. An analysis of the spectral quantum efficiency of thin solar cells is given as well as a full set of analytical models. This is the first comprehensive treatment of light trapping techniques for the enhancement of the optical absorption in thin silicon films.

Download or read book Solar Cell Device Physics written by Stephen J. Fonash and published by Elsevier. This book was released on 2012-12-02 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar Cell Device Physics offers a balanced, in-depth qualitative and quantitative treatment of the physical principles and operating characteristics of solar cell devices. Topics covered include photovoltaic energy conversion and solar cell materials and structures, along with homojunction solar cells. Semiconductor-semiconductor heterojunction cells and surface-barrier solar cells are also discussed. This book consists of six chapters and begins by introducing the reader to the basic physical principles and materials properties that are the foundations of photovoltaic energy conversion, with emphasis on various photovoltaic devices capable of efficiently converting solar energy into usable electrical energy. The electronic and optical properties of crystalline, polycrystalline, and amorphous materials with both organic and inorganic materials are considered, together with the manner in which these properties change from one material class to another and the implications of such changes for photovoltaics. Generation, recombination, and bulk transport are also discussed. The two mechanisms of photocarrier collection in solar cells, drift and diffusion, are then compared. The remaining chapters focus on specific solar cell device classes defined in terms of the interface structure employed: homojunctions, semiconductor-semiconductor heterojunctions, and surface-barrier devices. This monograph is appropriate for use as a textbook for graduate students in engineering and the sciences and for seniors in electrical engineering and applied physics, as well as a reference book for those actively involved in solar cell research and development.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Thin Films of Gallium Arsenide on Low cost Substrates written by Ralph Powers Ruth and published by . This book was released on 1979 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The metalorganic chemical vapor deposition (MO-CVD) technique has been applied to the growth of thin films of GaAs and GaAlAs on inexpensive polycrystalline or amorphous substrate materials (glasses, glass-ceramics, alumina ceramics, and metals) for use in fabrication of large-area low-cost photovoltaic device structures. Trimethylgallium (TMG), arsine (AsH3), and trimethylaluminum (TMAl) are mixed in appropriate concentrations at room temperature in the gaseous state and pyrolyzed at the substrate, which is heated in a vertical reactor chamber to temperature in the range 600 to 800°C, to produce the desired film composition and properties. Of ten candidate low-cost substrates initially identified for investigation, Corning Code 0317 glass and composites of CVD Ge/glass and sputtered Mo/glass were found to be the most satisfactory, the latter eventually serving as a reference substrate against which to compare the performance of other substrates. Single-crystal window-type solar cells, polycrystalline Schottky-barrier cells, and deposited-junction polycrystalline cells have been grown, fabricated, and characterized. Epitaxial GaAlAs/GaAs p-n junction cells with thin (~500Å) Ga02Al08As windows and GaAs:Zn - GaAs:Se junctions were made with AMO efficiencies as high as 12.8 percent with no AR coating, indicating the high quality of the films grown by the MO-C+VD process. Schottky barrier cells with efficiencies of 2.25 percent AMO (no AR coating) have been made on n/n polycrystalline GaAs structures on Mo/glass composite substrates, with short-circuit current densities up to 12.5 mA/cm2. Also, results of analyses of material and processing costs associated with fabrication of thin-film GaAlAs/GaAs solar cells by the MO-CVD process are discussed.

Download or read book Gallium Arsenide based Ternary Compounds and Multi band gap Solar Cell Research written by and published by . This book was released on 1993 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aim of this contract is the achievement of a high-efficiency, low-cost solar cell. The basic approach to the problem is centered upon the heteroepitaxial growth of a III-V compound material onto a single-crystal silicon wafer. The growth technique employed is metalorganic chemical vapor deposition. The silicon wafer may serve as a mechanical substrate and ohmic contact for a single-junction device, or may contain a p-n junction of its own and form the bottom cell of a two junction tandem solar cell structure. The III-V material for the single-junction case is GaAs and for the two-junction case is either GaAlAs or GaAsP, either material having the proper composition to yield a band gap of approximately 1.7 eV. Results achieved in this contract include the following: (1) a 17.6% efficient GaAs-on-Si solar cell; (2) an 18.5% efficient GaAs-on-Si concentrator solar cell at 400 suns; (3) a 24.8% efficient GaAs-on-GaAs solar cell; (4) a 28.7% efficient GaAs-on-GaAs concentrator solar cell at 200 suns; (5) measurement of the effects of dislocation density and emitter doping on GaAs cells; and (6) improvements in the growth process to achieve reproducible thin AlGaAs window layers with low recombination velocities and environmental stability.

Download or read book Final Report on Development of Germanium and Silicon Substrates for Thin film Gallium Arsenide Solar Cells written by C. E. Norman and published by . This book was released on 1984 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solar Cell Materials written by Arthur Willoughby and published by John Wiley & Sons. This book was released on 2014-01-13 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comparison of solar cell materials, including both new materials based on organics, nanostructures and novel inorganics and developments in more traditional photovoltaic materials. It surveys the materials and materials trends in the field including third generation solar cells (multiple energy level cells, thermal approaches and the modification of the solar spectrum) with an eye firmly on low costs, energy efficiency and the use of abundant non-toxic materials.

Download or read book Smart and Flexible Energy Devices written by Ram K. Gupta and published by CRC Press. This book was released on 2022-03-23 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scientific community and industry have seen tremendous progress in efficient energy production and storage in the last few years. With the advancement in technology, new devices require high-performance, stretchable, bendable, and twistable energy sources, which can be integrated into next-generation wearable, compact, and portable electronics for medical, military, and civilian applications. Smart and Flexible Energy Devices examines the materials, basic working principles, and state-of-the-art progress of flexible devices like fuel cells, solar cells, batteries, and supercapacitors. Covering the synthesis approaches for advanced energy materials in flexible devices and fabrications and fundamental design concepts of flexible energy devices, such as fuel cells, solar cells, batteries, and supercapacitors, top author teams explore how newer materials with advanced properties are used to fabricate the energy devices to meet the future demand for flexible electronics. Additional features include: • Addressing the materials, technologies, and challenges of various flexible energy devices under one cover • Emphasizing the future demand and challenges of the field • Considering all flexible energy types, such as fuel cells, solar cells, batteries, and supercapacitors • Suitability for undergraduate and postgraduate students of material science and energy programs This is a valuable resource for academics and industry professionals working in the field of energy materials, nanotechnology, and energy devices.

Download or read book Solar Energy Update written by and published by . This book was released on 1983 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: