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  • 1
    ISSN: 1432-0630
    Keywords: PACS: 61.80.Fe; 61.82.Fk; 84.60.Jt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. We investigate the degradation of ZnO/CdS/ Cu(In,Ga)Se2 heterojunction solar cells for space applications and the defect generation in polycrystalline Cu(In,Ga)Se2 thin films by irradiation with 1-MeV electrons with fluences φe up to φe=5×1018 cm-2. Notable degradation of the solar cell performance starts at fluences of φe=1017 cm-2 where the open circuit voltage decreases by about 5% while short circuit current and fill factor remain essentially unaffected. Thus, Cu(In,Ga)Se2 solar cells withstand electron fluences which are higher by one order of magnitude or more when compared to other technologies. A model describes the absolute open circuit voltage loss considering the increase of space charge recombination by electron irradiation-induced defects. Defect analysis by admittance spectroscopy shows that acceptor defects with an energy distance of approximately 300 meV from the valence band are generated at a rate γ=0.017 (±0.01) cm-1.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Chromosomale Deletion 22q ; Sotos-like-Syndrom ; Key words Chromosome deletion 22q ; Overgrowth syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Of the distinct syndromes and associations featuring overgrowth, some still await further characterization. Major distinguishing marks between these overgrowth disorders include craniofacial abnormalities, statomotoric and mental retardation, and muscular hypotonia. We describe a 3-year-old girl with tall stature, facial dysmorphy, severe mental retardation, and an interstitial deletion of the long arm of chromosome 22/del(22)(q13.1;q13.33). The chromosome 22q13 deletion syndrome was only recently reported by Nesslinger et al. [1] as a new nosologic entity. Discussion: It is assumed that there is a growth gene at the chromosome 22q deletion.
    Notes: Zusammenfassung Wir berichten über ein 3jähriges Mädchen, das wegen statomotorischer und mentaler Retardierung, generalisierter Muskelhypotonie und übermäßigem Wachstum zur klinisch-genetischen Diagnostik kam. Zytogenetisch wurde eine De-novo-Deletion 22q13 festgestellt. In der Literatur wurden 7 Patienten mit einem ähnlichen Phänotyp beschrieben. Diskussion: Es ist zu vermuten, daß im Deletionsintervall 22q ein Wachstumsgen liegt.
    Type of Medium: Electronic Resource
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