Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by and published by . This book was released on 1978 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by J. R. Szedon and published by . This book was released on 1978 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cells of the Al--SiO2--pSi type were made having electrical contact at their peripheries with large area n-p junctions. A model for the behavior of these devices was developed to treat their current--voltage behavior on illumination with the peripheral area masked. Open circuit voltage dependence on illumination level can be misinterpreted as indicating high values of diode ideality factor (n) associated with thermionic emission affected by a high density of interface states. Illuminated current--voltage characteristics of conventional cells (no peripheral n-p junctions) were taken for 25°C

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by and published by . This book was released on 1978 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by J. R. Szedon and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies have been made of the sensitivity of the behavior of Al--SiO2--pSi cells to details of formation of the back ohmic contact. Equivalently good behavior is obtained with aluminum or Ti--Pd--Au applied, without sintering, to a lapped, freshly etched back surface of the wafer. Good results for short circuit current enhancement with thermally evaporated films of Ta2O5 as AR coatings have been obtained. Electron beam evaporated films of Ta2O5 and spun-on films of TiO2 from a liquid organometallic precursor give much lower open circuit voltage, due to ionizing radiation damage in the former instance and chemical interactions on baking in the latter case. Successful thinning of 80A thick Al films has been done by slow (approx. 2A/min) etching in 1% H2SO4 without affecting diode opposing current or open circuit voltage. Chemically treated and AR coated cells have been prepared with conversion efficiency (for the optically active area) of 11% on cells of nominal 0.1 cm2 area. A summary of the program status after the first year of work is given.

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Cell Extension written by Exxon Research and Engineering Company. Government Research Laboratories and published by . This book was released on 1979 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by J. R. Szedon and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of approaches have been explored to improve the short circuit current-fill factor product of Al-SiO2-pSi cells from the point of view of the trade-off between optical transmission into the silicon and series resistance contribution from the high sheet resistance components of the cell. The approaches have involved material modification (evaporating aluminum in an oxygen containing ambient to improve transmission), partitioning the cell surface between alternate strips of metal (thin or thick) and bare silicon having an inversion layer and illuminating a carefully designed cell on the surface opposite that bearing the MIS collecting barrier. Experimental cells with comparable efficiency have been made with all four approaches. Details of cell operation and models for performance have been examined carefully. The inversion layer cell (with narrow opaque metal strips providing an MIS contact to an inversion layer over the full illuminated cell surface) is the most promising of the conventional approaches. The back illuminated cell with a BSF region is very attractive from standpoints of environmental stability, performance optimization and applicability of thin polycrystalline silicon films. Work at Penn State has established that the Al-SiO2-pSi cell is bulk diffusion controlled in dark current behavior and stores charge within the thin SiO2 layer.

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by Westinghouse Electric Corporation. Research & Development Center and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by Westinghouse Electric Corporation. Research & Development Center and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure single crystal silicon photovoltaic solar cells written by Westinghouse Electric Corporation. Research & Development Center and published by . This book was released on 1978 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by J. R. Szedon and published by . This book was released on 1978 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single crystal Silicon Photovoltaic Cell Type A Semiconductor Heterojunction Silicon Devices Annual Report September 28 1976 November 30 1977 written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Important electrical properties for the SnO2/Si heterostructure solar cell are summarized. The maximum theoretical efficiency and practically achievable efficiency are calculated. The method of fabricating the solar cell is described, and cost estimates and recommendations are given. A paper entitled SnO2/Si Solar Cells - Heterostructure or Schottky Barrier or MIS Type Device is appended which was previously abstracted for EDB. (LEW).

Download or read book Physics and Technology of Amorphous Crystalline Heterostructure Silicon Solar Cells written by Wilfried G. J. H. M. van Sark and published by Springer Science & Business Media. This book was released on 2011-11-16 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today’s solar cell multi-GW market is dominated by crystalline silicon (c-Si) wafer technology, however new cell concepts are entering the market. One very promising solar cell design to answer these needs is the silicon hetero-junction solar cell, of which the emitter and back surface field are basically produced by a low temperature growth of ultra-thin layers of amorphous silicon. In this design, amorphous silicon (a-Si:H) constitutes both „emitter“ and „base-contact/back surface field“ on both sides of a thin crystalline silicon wafer-base (c-Si) where the electrons and holes are photogenerated; at the same time, a-Si:H passivates the c-Si surface. Recently, cell efficiencies above 23% have been demonstrated for such solar cells. In this book, the editors present an overview of the state-of-the-art in physics and technology of amorphous-crystalline heterostructure silicon solar cells. The heterojunction concept is introduced, processes and resulting properties of the materials used in the cell and their heterointerfaces are discussed and characterization techniques and simulation tools are presented.

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by J. R. Szedon and published by . This book was released on 1978 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Solar Cells written by J. R. Szedon and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Silicon Heterojunction Solar Cells written by W.R. Fahrner and published by Trans Tech Publications Ltd. This book was released on 2006-08-15 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world of today must face up to two contradictory energy problems: on the one hand, there is the sharply growing consumer demand in countries such as China and India. On the other hand, natural resources are dwindling. Moreover, many of those countries which still possess substantial gas and oil supplies are politically unstable. As a result, renewable natural energy sources have received great attention. Among these, solar-cell technology is one of the most promising candidates. However, there still remains the problem of the manufacturing costs of such cells. Many attempts have been made to reduce the production costs of “conventional” solar cells (manufactured from monocrystalline silicon using diffusion methods) by instead using cheaper grades of silicon, and simpler pn-junction fabrication. That is the ‘hero’ of this book; the heterojunction solar cell.

Download or read book Heterostructure Single Crystal Silicon Photovoltaic Cell Extension written by Exxon Research and Engineering Company. Government Research Laboratories and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: