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  • 1
    Electronic Resource
    Electronic Resource
    Diffusion length in CdTe by measurement of photovoltage spectra in CdS/CdTe solar cells (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 460-465 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Modified method of surface photovoltage (SPV), spectral response measurement, and constant photocurrent method (CPM) were applied to thin film CdS/CdTe solar cells with the aim of finding diffusion length of minority carriers (L) in the CdTe material. The SPV signal was theoretically calculated without constraints of absorption coefficients for the incident radiation and thickness of the sample assuming one space charge region (SCR) located on the CdS/CdTe interface. In addition to the diffusion length, the SPV is a function of the surface recombination velocity and the parameters of the SCR, which complicates the evaluation. Illuminating the back side of the solar cell (without ohmic contact) we obtain a photovoltage spectrum predominantly influenced by the diffusion length. On the other hand, the standard measurement using light penetrating from the CdS side strongly depends on the thickness of the SCR. The small signal approximation model presented here successfully explains both measured spectra and permits extraction of the diffusion length of minority carriers and thickness of the SCR in CdTe absorber. The CPM is used for determination of absorption coefficients in the CdTe layer. The absorption of this material depends on its preparation and must be known for correct evaluation of experimental data. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1332418
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  • 2
    Electronic Resource
    Electronic Resource
    Electropolishing of metals in alcoholic solution of sulphuric acid
    Amsterdam : Elsevier
    Electrochimica Acta 22 (1977), S. 47-50 
    Details
    ISSN: 0013-4686
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0013-4686(77)85052-4
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  • 3
    Electronic Resource
    Electronic Resource
    Thermostimulated currents in p-type cadmium telluride single crystals (1967)
    Springer
    Czechoslovak journal of physics 17 (1967), S. 462-466 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ssveral samples of CdTe were measured in a temperature range of −190
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01725694
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  • 4
    Electronic Resource
    Electronic Resource
    The homogeneization quenching of platinum (1970)
    Springer
    Czechoslovak journal of physics 20 (1970), S. 56-62 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper the defect structure of platinum during homogeneization quenching has been studied by transmission electron microscopy on electropolished foils. Several black dots about 100 Å in diameter have been observed on the foils, corresponding to a density of the order of 1014 −3. The dots have been interpreted as clusters of vacancies retained in the presence of impurities. The analysis of the number of quenched-in vacancies leads to the conclusion that the clusters are spherical and about 110 Å in diameter. In contrast to copper no dislocation density growth with the number of quenchings could be observed as the dislocation density is less than 108 cm−2, which could not be detected exactly enough by the electron microscope method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01698107
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  • 5
    Electronic Resource
    Electronic Resource
    The generation of free carriers in CdTe by radiation (1973)
    Springer
    Czechoslovak journal of physics 23 (1973), S. 1403-1409 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents the results of the quantum efficiency measurement of CdTe over the photon energy range 1·5–4·5 eV obtained from the photovoltaic effect on special photodiodes. There are two “kinks” observable in the increase of the quantum efficiency which can be explained on the basis of the band structure of CdTe. The first is due to electron, the second due to hole ionization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01586529
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  • 6
    Electronic Resource
    Electronic Resource
    Beitrag zum Mechanismus der Lochfraßkorrosion des Nickels (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 496-501 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: A contribution to the mechanism of the pitting corrosion of nickelThe pitting corrosion of nickel has been studied as a function of time, pH, potential and concentration in various salt solutions. It has been revealed that the number of pits as a function of time depends from the salt concentration and this dependence may be linear or parabolic. The potential dependence of the number of pits, on the other hand, follows an exponential law. From the salts included in the present study the chlorides in particular give rise to pitting; their effect is in part rather stimulated by nitrates. Sulfates, too, affect the action of chlorides, but their effect is different, depending on their concentration On the basis of the experimental results the author discusses possible mechanisms of pit formation and pit growth.
    Notes: Die Lochfraßkorrosion von Nickel wurde in Abhängigkeit von Zeit, pH, Potential und Konzentration in verschiedenen Salzlösungen gemessen. Dabei zeigt sich, daß die Lochzahl zeitlich von der Konzentration der Salze abhängt, wobei die Zeitabhängigkeit linear oder parabolisch sein kann. Die Potentialabhängigkeit der Lochzahl folgt wieder einem Expotentialgesetz. Von den untersuchten Salzen wirken vor allem die Chloride lochfraßerzeugend;. ihre Wirkung wird durch Nitrate teil- weise stark stimuliert. Auch Sulfate beeinflussen die Wirkung der Chloride, jedoch in verschiedenen Konzentrationsbereichen unterschiedlich. Aufgrund der Ergebnisse werden mögliche Mechanismen der Lochbildung und des Lochwachstums erörtert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250704
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  • 7
    Electronic Resource
    Electronic Resource
    Lochfraßkorrosion des Eisens in alkalischen Chloridlösungen (1970)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 21 (1970), S. 21-25 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Pitting corrosion of iron in alkaline chlorine solutionsThe author has studied the corrosion of iron in chloride solutions (0.4 M KCl) with hydroxyl ions (0.1 M KOH), used as a pitting corrosion inhibitor. The rate of pitting corrosion in alkaline media can be represented in the form of a cubic parabola whilst the number of pits is a linear function. It was found pitting corrosion depends on the potential, on the concentration, and on the ratio of the concentration of activating and passivating ions, respectively. Another important factor is the adsorption of the anions on the electrode surface. The author has formulated equations for all these relations. The depassivation potential proves to be a suitable criterion for characterizing the pitting corrosion proneness under different conditions.
    Notes: Der Verfasser untersuchte die Lochfraßkorrosion von Eisen in Chloridlösungen (0,4 m Kaliumchlorid) bei Zusatz von Hydroxylionen (0,1 m Kaliumhydroxid) als Lochfraßinhibitoren. Die Geschwindigkeit der Lochfraßkorrosion im alkalischen Medium läßt sich durch eine kubische Parabel darstellen, während sich für die Lochzahl eine Gerade ergibt. Für die Lochfraßkorrosion wurde eine ausgeprägte Potentialabhängigkeit gefunden, ebenso eine Abhängigkeit von der Konzentration und vom Konzentrationsverhältnis, von aktivierenden zu passivierenden Ionen. Auch die Adsorption der Anionen auf der Elektrodenoberfläche hat einen wesentlichen Einfluß. Für sämtliche Abhängigkeiten wurden Gleichungen auf-gestellt. Das Depassivierungspotential erweist sich als geeignet zur Charakterisierung der Lochfraßanfälligkeit unter ver-schiedenen Bedingungen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19700210105
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Frage des Mechanismus der Lochfraßkorrosion (1972)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 23 (1972), S. 109-112 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The question of the pitting corrosion mechanismIt is concluded from the time, concentration, temperature, PH and potential dependences of the corrosion current densities in the pits, that it is not justified always to suppose parallelity between the metal dissolution rates in the active pits and in the active region of the polarization curve. This is due to the fact, that in some cases diffusion is not the rate controlling factor of pitting corrosion, and that the metal dissolution in the pits and in the active states follows different mechanisms.
    Notes: Die Zeit-, Konzentrations-, Tempera-tur-, PH- und Potentialabhängigkeit der Korrosionsstromdichte in den Lochfraß stellen zeigt, daß nicht immer eine Parallelität zwischen der Geschwindigkeit der Metallauflösung in den aktiven Lochfraßstellen und im aktiven Gebiet der Polarisationskurve angenommen werden darf. In manchen Fällen ist nämlich nicht die Diffusion der geschwindigkeitsbestimmende Faktor der Lochfraßkorrosion und außerdem verläuft die Metallauflösung in den Lochfraßstellen und im aktiven Zustand nach Verschiedenen Mechanismen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19720230207
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  • 9
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    Electrical characterization of fluorinated benzothiadiazole based conjugated copolymer – a promising material for high-performance solar cells (2015)
    American Institute of Physics
    Details
    Publication Date: 2015-12-01
    Electronic ISSN: 2158-3226
    Topics: Physics
    Published by American Institute of Physics
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  • 10
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    Direct measurement of exciton dissociation energy in polymers (2017)
    American Institute of Physics
    Details
    Publication Date: 2017-01-01
    Electronic ISSN: 2158-3226
    Topics: Physics
    Published by American Institute of Physics
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