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  • 1965-1969  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 207 (1967), S. 484-499 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The emission spectra and the temperature dependence of the relative intensity of luminescence of three manganese activated titanate phosphors [Zn2TiO4, (Mg, Zn)2TiO4, Mg2TiO4] after optical excitation with radiation from 300–500 nm were measured for various temperatures above 4,2 °K. The luminescence of the Mn4+-centre is influenced by the cations (Mg2+ or Zn2+) of the lattice. The temperature dependence of the relative intensity of the luminescence depends on the excitation wavelength. The results are discussed and found to be in good agreement with those of aC-C-model which assumes two energy parabolas for the excited state.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 5 (1966), S. 371-379 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Résumé La linie ESRg=1,957, caractéristique pour la poudre de ZnO propre activée, a été recherchée. On peut montrer, que la linie bien connue consiste en deux parts (g h=1,9555 etg a=1,9580). Les deux centres paramagnétiques peuvent identifiés en comparant des qualités de luminescence. La part „h” avec lag-valeurg h plus petit provient des pièges à trous remplis, c.-à-d. des ions oxygènes interstitiels. Le deuxième signal partiel „a” provient des activateurs pas ionisés, c.-à-d. des défauts oxygènes occupés d'un électron.
    Abstract: Abstract The ESR-lineg=1,957 of self-activated ZnO-powder is investigated. It can be shown that the well-known ZnO-line consists of two parts (g h=1,9555 andg a=1,9580). The two paramagnetic centers can be identified by considering corresponding luminescence properties. The part „h” with the lowerg-valueg h is given by the filled hole traps, i.e. by oxygen-ions on interstitual places. The second part of the ESR-signal results from activators, which are not ionized, i.e. oxygen defects filled by one electron.
    Notes: Zusammenfassung Es wird die für eigenaktiviertes ZnO-Pulver charakteristische ESR-Linie beig=1,957 untersucht. Es kann gezeigt werden, daß die bekannte ZnO-Linie aus zwei Anteilen besteht (g h=1,9555 undg a=1,9580). Die beiden paramagnetischen Zentren können durch Analogien zu Lumineszenzeigenschaften identifiziert werden. Der Anteil „h” mit dem kleinereng-Faktorg h stammt von den gefüllten Löcherhaftstellen, d. h. von: Sauerstoff-Zwischengitterionen. Das zweite Teilsignal „a” rührt von den nicht-ionisierten Aktivatoren, d. h. von mit einem Elektron besetzten Sauerstofflücken her.
    Type of Medium: Electronic Resource
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