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  • 1
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    Jupiter, Florida, intercomparison experiment (1967)
    In:  Other Sources
    Details
    Publication Date: 2011-08-12
    Description: Photography of Geos 1 flashes with Baker-Nunn and K-50 geodetic cameras
    Keywords: GEOPHYSICS
    Type: GEODETIC SATELLITE RESULTS DURING 1967 29 DEC. 1967; P 101-128
    Format: text
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  • 2
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    Transport velocity transformation - A convenient method for performance analysis of multilayer solar cell structure (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: It is noted that in the case of low-level injection, space-charge quasi-neutrality, and spatially constant material parameters (including an electrostatic field), the individual layer can be treated analytically and the basic solar cell performance parameters can be evaluated from three equations. The first equation represents the transformation of the transport velocity across the layer from the other layer boundary. The second establishes the light-generated current output from the layer interface, under the influence of the transport velocities and minority-carrier density at both layer boundaries and of bulk recombination. The third equation describes the flow of these carriers across other layers. The power of the approach is considered to lie in its facility for analysis of the solar cell's performance layer by layer, giving a clear picture of the individual layer's influence on cell efficiency.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: IEEE Transactions on Electron Devices; ED-28; May 1981
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  • 3
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    Interactions of efficiency and material requirements for terrestrial silicon solar cells (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The transport velocity transformation method was used to analyze solar cell designs to determine optimum cell structures. It was found that low resistivity materials should be used up to the onset of Auger recombination; a properly designed three-layer structure permits base region approaching an ideal device in performance; and that higher resistivity front regions will need more sophisticated grid metallization structures than those used now. It was concluded that new features will provide idealized silicon cell structures yielding airmass 1 efficiencies in the 24-26.5% range, with real efficiencies near 22%.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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  • 4
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    Materials requirements for high-efficiency silicon solar cells (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: To achieve higher Si solar cell efficiencies (greater than 20%), better single-crystal Si must be produced. It is believed possible to bring Cz (Czochralski) Si up to the same low recombination level as FZ (Float Zone) Si. It is also desirable that solar cell Si meet the following requirements: long minority carrier lifetime (0.2 ohm-cm p-type with tau less than 500 microsec); repeatedly uniform lifetime (not spread from 50 to 1000 microsec); a lifetime that does not decrease during normal device processing; a silicon wafer sheet that is flat and stays throughout normal device processing; uniform and reasonable mechanical strength; and, manufacture at low cost (less than $50/sq m).
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proceedings of the Flat-Plate Solar Array Project Workshop; p 3-15
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  • 5
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    Summary of the high-efficiency crystalline solar cell research forum (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: An outline is given listing the speeches given in each session and the pertinent points is some speeches. There were six session, besides the overview session they were: (1) high efficiency concepts; (2) surface/interface effects; (3) bulk effects; (4) modeling; and (5) high efficiency device processing. Besides the emphasis placed on increasing efficiency of energy conversion, a great amount of discussion was spent on ways to reduce recombination and reducing surface defects.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the 24th Project Integration Meeting; p 57-74
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  • 6
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    Silicon solar cell efficiency improvement: Status and outlook (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Efficiency and operating life is an economic attribute in silicon solar cells application. The efficiency improvements made during the 30 year existence of the silicon solar cells, from about 6% efficiency at the beginning to 19% in the most recent experimental cells is illustrated. In the more stationary periods, the effort was oriented towards improving radiation resistance and yields on the production lines, while, in other periods, the emphasis was on reaching new levels of efficiency through better cell design and improved material processing. First results were forthcoming from the recent efforts. Considerably more efficiency advancement in silicon solar cells is expected, and the anticipated attainment of efficiencies significantly above 20% is discussed. Major advances in material processing and in the resulting material perfection are required.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the Flat-Plate Solar Array Proj. Res. Forum on High-Efficiency Crystalline Silicon Solar Cells; p 53-75
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  • 7
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    Polarizabilities of highly ionized atoms (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: An extrapolation method based on a screening approximation, applied to available initial values of polarizability for low stages of ionization, is used to obtain dipole and quadrupole polarizabilities for more highly ionized members of many isoelectronic sequences. It is suggested that the derived screening constants x sub L and limiting ratios F sub L may have significant physical meaning, especially the latter which may have an interpretation in terms of hydrogenic polarizabilities.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Optical Society of America; vol. 69
    Format: text
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  • 8
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    Radiation-Resistant Solar Cells - A Panel Discussion (1962)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Radiation resistant silicon cells for solar energy conversion
    Keywords: CHEMISTRY
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  • 9
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    Novel measurement techniques (development and analysis of silicon solar cells near 20% effciency) (1986)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Work in identifying, developing, and analyzing techniques for measuring bulk recombination rates, and surface recombination velocities and rates in all regions of high-efficiency silicon solar cells is presented. The accuracy of the previously developed DC measurement system was improved by adding blocked interference filters. The system was further automated by writing software that completely samples the unkown solar cell regions with data of numerous recombination velocity and lifetime pairs. The results can be displayed in three dimensions and the best fit can be found numerically using the simplex minimization algorithm. Also described is a theoretical methodology to analyze and compare existing dynamic measurement techniques.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL, California Inst. of Tech., Pasadena Proceedings of the 26th Project Integration Meeting; p 345-355
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  • 10
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    Research and development of low cost processes for integrated solar arrays (1975)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Si reduction, purification and sheet generation work has been concentrated on gaining information about a reduction process combined with purification (higher purity arc furnace with gas blowing and gradient freezing), transport process with purification and polycrystal sheet growth potential (SiF2), plastic deformation for sheet generation, and float zone sheet recrystallization.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Proc. of the 1st ERDA Semiann. Solar Photovoltaic Conversion Program Conf.; p 172-193
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