Investigation of the Ambipolar Diffusion of Free Carriers in Inhomogeneously Photoexcited Zinc Sulfide Crystals

  • N. N. Grigor’ev
  • M. V. Fok
Part of the The Lebedev Physics Institute Series book series (LPIS)


Several methods, based on an investigation of the luminescence of a crystal, were developed for the determination of the transport processes and their range, The luminescence contour method was used to show that the range of ambipolar diffusion was 5–10 μ, whereas the bulk of the crystal was excited by the reabsorption of the luminescence, A new transport parameter α 0, representing the change in the recombination rate under diffusion conditions and the spatial distribution of the nonequilibrium carrier density, was introduced in a theoretical justification of this method for semiconductors with the quadratic recombination kinetics. Investigations of the influence of the excitation rate, size of the excitation region, long-wavelength background radiation, and an alternating electric field on the spatial distribution of the luminescence excited in a crystal by a narrow strip of light yielded results in good agreement with the theory.


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Copyright information

© Springer Science+Business Media New York 1975

Authors and Affiliations

  • N. N. Grigor’ev
  • M. V. Fok

There are no affiliations available

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