Advertisement

Neue Ergebnisse über Elektronentraps und “Tunnel-Nachleuchten” in ZnS

  • Nikolaus Riehl
Chapter
Part of the Advances in Solid State Physics book series (ASSP, volume 8)

Abstract

Experiments carried out with G. Baur, L. Mader and P. Thoma have shown the existence of a strong release from traps due to tunneling at liquid helium temperature. The tunneling is connected with emission of photons and causes an afterglow which is observable up to hours („tunnel-afterglow”). This emission shows a red-shift compared with the usual thermal activated phosphorescence because the transitions take place not from the edge of the conduction band but directly from the trap levels. This mechanism of trap emptying has considerable consequences for the interpretation of glow-curves below 100 °K.

Continuous or quasi-continuous trap depth distribution is much more revealed in phosphors of the ZnS-type than it was believed before. The trap depth distribution over the energy scale can be directly determined from the hyperbolic decay curves which are valid over broad decay periods at constant temperature.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literatur

  1. [1]
    Vgl. F. Williams in P. Goldberg “Luminescence of inorganic Solids” New York— London 1966, p. 2 und S. Shionoya, dort selbst, p. 206.Google Scholar
  2. [2]
    N. Riehl u. H. Ortmann Ann. d. Phys., (7), 4, 1 (1959). H. Blicks, N. Riehl u. R. Sizmann, Z. f. Phys. 163, 594 (1961). N. Riehl, R. Sizmann, in Kallmann-Spruch “Luminescence of org. and inorg. Materials”, New York—London, p. 344. J. Knobloch, N. Riehl u. R. Sizmann, Z. f. Phys. 171, 505 (1963).Google Scholar
  3. [3]
    I. Broser, R. Broser-Warminsky, H.-J. Schulz, Proc. Int. Conf. Semicond. Phys. Prague 1961, p. 771. I. Broser, K.-H. Franke, H. Maier, H.-J. Schulz, Lumineszenz-Symposium Phys. u. Chem. d. Szintillatoren, München, 1965, S. 359. H.-J. Schulz in “Festkörperprobleme”, Braunschweig, B. VII (1967), S. 75.Google Scholar
  4. [4]
    M. A. Lampert, A. Rose, R. W. Smith, J. Phys. Chem. Solids 8, 464 (1959).CrossRefADSGoogle Scholar
  5. [5]
    W. Hoogenstraaten, Philips Res. Rep. 13, 515 (1958).Google Scholar
  6. [6]
    N. Riehl, Intern. Conf. on Luminescence Budapest (1966), in Druck. L. Mader u. N. Riehl, Z. f. Phys. 206, 319 (1967).Google Scholar
  7. [7]
    H. Gobrecht u. D. Hofmann, J. Phys. Chem. Solids 27, 509 (1966); Physik d. kondens. Materie 5, 39 (1966).CrossRefADSGoogle Scholar
  8. [8]
    G. Baur, J. Knobloch, N. Riehl u. P. Thoma, Z. F. Naturforsch 21a, 851 (1966). G. Baur, N. Riehl u. P. Thoma, Z. f. Phys. 206, 229, (1967). N. Riehl, G. Baur, L. Mader u. P. Thoma, II–VI Compounds Conference Providence 1967, p. 724.ADSGoogle Scholar
  9. [9]
    E. J. Adirowitsch, “Einige Fragen zur Theorie der Lumineszenz der Kristalle”, Berlin 1953.Google Scholar
  10. [10]
    H. Diehl u. A. Scharmann, Z. f. angew. Phys. 24, 173 (1968).Google Scholar
  11. [11]
    E. F. Apple and F. W. Williams, J. Electrochem. Soc. 106, 224 (1959). J. S. Prener and F. E. Williams, Phys. Rev. 101, 1427 (1956). F. E. Williams, J. Phys. Chem. Solids 12, 265 (1960).CrossRefGoogle Scholar
  12. [12]
    J. J. Hopfield, D. G. Thomas and M. Gershenzon, Phys. Rev. Letters, 10, 162 (1963). D. G. Thomas, M. Gershenzon and F. A. Trumbore, Phys. Rev. 133, A 269 (1964).CrossRefADSGoogle Scholar
  13. [13]
    S. Shionoya, International Conference on Luminescence, Budapest (1966), in press.Google Scholar

Copyright information

© Friedr. Vieweg & Sohn GmbH, Verlag 1968

Authors and Affiliations

  • Nikolaus Riehl
    • 1
  1. 1.Physik-Department der Technischen Hochschule MünchenMünchenDeutschland

Personalised recommendations