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  • Inorganic Chemistry  (765)
  • ENERGY PRODUCTION AND CONVERSION  (673)
  • Humans
  • 2015-2019
  • 1975-1979  (1,662)
  • 1950-1954
  • 1978  (1,662)
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  • 2015-2019
  • 1975-1979  (1,662)
  • 1950-1954
Year
  • 1
    Publication Date: 2019-07-13
    Description: The silicon-on-ceramic (SOC) process uses inexpensive ceramic substrates to provide supported growth of silicon from the melt. The conditions for unidirectional solidification, the grain structure and other properties are quite similar to those of EFG silicon ribbon. Solar cells with interdigital electrodes have demonstrated AMl conversion efficiencies (active area) of 7.8% without AR coatings and 10.1% efficiencies with an AR coating of SiO. Mathematical modeling of the series resistance of cells shows the feasibility of making electrical contact to the base layer of the cell through slots in the substrate. However, series resistance in the base layer sets an upper limit on slot spacing for efficient cell performance.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Photovoltaic Specialists Conference; Jun 05, 1978 - Jun 08, 1978; Washington, DC
    Format: text
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 443 (1978), S. 11-18 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: TlPd3O4 and TlPt3O4 - Ternary Platinum Metal Oxides with Cluster StructureThe crystal structure of the cardinal red oxide TlPd3O4, prepared by the reaction of Pdo with TlNO3 or Tl2O3 at 550°C, has been determined on powder samples by X-ray and neutron diffraction. The structure of the cubic compound (a = 959.6(2) pm; space group Fm3m; Z = 8) contains square-planar PdO4 units which are joined to a three dimensional skeleton by triply bonding oxygen atoms. The cubic and rhombicuboctahedral spaces are occupied by TlIII and TlI cations so that the compound can be formulated as a mixed valency thallium(III)-thallium(I)-oxopalladate(II). The relationship with the structure of the platinum bronzes is discussed.The analogous ternary platinum oxide TlPt3O4 (a = 966.3(2)pm) has been obtained by thermal decomposition of Tl2Pt2O7.
    Notes: Die Kristallstruktur des durch Umsetzung von Pdo mit TlNO3 bzw. Tl2O3 bei 550°C erhaltenen kardinalroten Oxides TlPd3O4 wurde durch Röntgen-und Neutronenbeugung an Pulverproben aufgeklärt. In der Struktur der kubischen Verbindung (a = 959,6(2) pm; Raumgruppe Fm3m; Z = 8) sind quadratisch planare Pdo4- Baugruppen über dreibindige O- Atome zu einem dreidimensionalen Netz verknüpft. Die würfelförmigen und rhombendodekaedrischen Hohlräume des Gerüstes sind von TlIII-bzw. TlI-Kationen besetzt, so daß die Verbindung als valenzgemischtes Thallium (III)-thallium(I)-oxopalladat(II) formuliert werden kann. Die Verwandtschaftsverhältnisse zu den Strukturen der Platinbronzen werden diskutiert.Das entsprechende Oxoplatinat TlPt3O4 (a = 966,3(2) pm) konnte durch thermische Zersetzung von Tl2Pt2O7 erhalten werden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2019-07-13
    Description: The work accomplished on the Mini-Brayton Heat Source Assembly program is summarized. Required technologies to design, fabricate and assemble components for a high temperature Heat Source Assembly (HSA) which would generate and transfer the thermal energy for a spaceborne Brayton Isotope Power System (BIPS) were developed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-159447 , DOC-78SDS4252
    Format: application/pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1180-1194 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New 1,3,2,4-DiazadiphosphetidinesThe 1,3,2,4-diazadiphosphetidines 5a-f are easily prepared by the reaction of chlorobis(dialkylamino)phosphanes with sodium bis(trimethylsilyl)amide. Further oxidation reactions by O2, S8, N3Si(CH3)3, and alkyl halides are tested in detail in the case of 5a. As shown by NMR spectroscopy, 5a-f are obtained from synthesis almost exclusively as cis isomers which on thermal treatment form a mixture of cis and trans isomers. Methoiodide adducts 9a-f show this isomerisation as well.
    Notes: Die Reaktion von Chlorbis(dialkylamino)phosphanen mit Natrium-bis(trimethylsilyl)amid eröffnet einen bequemen Weg zu den 1,3,2,4-Diazadiphosphetidinen 5a-f, deren Erst- und Zweitoxidation durch O2,S8, N3Si(CH3)3 und Alkylhalogenide am Beispiel von 5a ausführlicher untersucht wird. 5a-f fallen bei der Darstellung fast ausschließlich als cis-Isomere an, die thermische Behandlung führt  -  wie NMR-spektroskopisch gezeigt wird  -  zu einem cis-trans-Isomerengemisch. Auch die Methoiodide 9a-f zeigen cis-trans-Isomerisierung.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1655-1658 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,2,7-Azadiphosphepines  -  New Phosphorus and Nitrogen Containing Heterocycles1 reacts with 2 moles of 2 to give the bicyclic compound 3 containing the new 1,2,7-azadiphosphepine ring system. Diphosphinoamines 5 can be considered as three-membered segments of the eight-membered ring system 1. Thus the amines 5 react with 2 likewise to give monocyclic 1,2,7-azadiphosphepines 6.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 6
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    In:  CASI
    Publication Date: 2006-01-12
    Description: A series of abuse tests on large lithium thionyl chloride cells was initiated. Performance data obtained in testing rectangular 2,000 and 10,000 ampere-hour cells are discussed and graphically presented.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Goddard Space Flight Center 11th Ann. Battery Workshop; p 505-510
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  • 7
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    In:  CASI
    Publication Date: 2019-06-27
    Description: A gas turbine powered aircraft auxiliary power system is described which is capable of efficiently supplying all aircraft auxiliary services both in flight and on the ground and is further capable of operating independently of the aircraft main engines. The system employs multiple gas turbine compressor stages, thereby accomplishing cabin pressurization, ventilation and heating.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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  • 8
    Publication Date: 2019-07-13
    Description: Solar cells were fabricated from unconventional silicon sheets, and the performances were characterized with an emphasis on statistical evaluation. A number of solar cell fabrication processes were used and conversion efficiency was measured under AMO condition at 25 C. Silso solar cells using standard processing showed an average efficiency of about 9.6%. Solar cells with back surface field process showed about the same efficiency as the cells from standard process. Solar cells from grain boundary passivation process did not show any improvements in solar cell performance.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-158035 , DOE/JPL-955089-78/10 , QR-1
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  • 9
    Publication Date: 2019-07-13
    Description: Ribbon to Ribbon (RTR) solar cells processed from polycrystalline feedstock showed maximum AMO efficiency of 5.6%. Solar cells from single crystalline feedstock showed slightly higher efficiency than those from polycrystalline feedstock, indicating maximum efficiency of about 6.6% with SiO AR coating. Single crystalline control cells gave 11-12% AMO efficiencies demonstrating that the poor performance of the RTR solar was due to the low quality of material itself. Dendritic web solar cells from the standard process showed maximum AMO efficiency of 9.8% while efficiency of control solar cells were around 11-12%. Web solar cells from back surface field (BSF) process indicated maximum AMO efficiency of 10.9%. Some improvement in open circuit voltage was noticed from the BSF process. Small light spot scanning experiments were carried out on the solar cells from Wacker Silso, EFG, RTR, and dendritic web ribbons. Photoresponse results provided information on localized cell performance and grain size in polycrystalline material, and agreed quite well with the cell performance data, such as efficiency, minority carrier diffusion length, and spectral response.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-158363 , DOE/JPL-955089-79/1 , QR-2
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  • 10
    Publication Date: 2011-08-17
    Description: Antireflecting-metal-oxide-semiconductor (AMOS) technology has been applied to sliced wafers of polycrystalline GaAs having grain sizes of about 100 microns. Simulated AM1 sunlight efficiencies up to 14% were obtained, and studies using the scanning electron microscope showed that grain boundaries have a minimal effect on short-circuit current density. However, current-voltage characteristics show some influence on open-circuit voltage.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Applied Physics Letters; 33; Sept. 1
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