Abstract
We propose a model of the narrowing of a forbidden band due to doping of crystalline semiconductors with hydrogen‐like impurities with allowance for the following factors: spatial fluctuations of an electrostatical potential, exchange interaction of majority charge carriers, screening of the minority charge carrier by a cloud of the majority ones, and also tunneling at the level of percolation. The dependence of the position of the edge luminescence band maximum on the concentration of impurities for the degrees of their compensation from a weak to an intermediate one has been calculated. The results agree with the experimental data for cryogenic temperatures in a wide range of change in the equilibrium concentration of electrons (holes).
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Poklonskii, N.A., Vyrko, S.A. Electrostatic Model of Edge Luminescence of Heavily Doped Degenerate Semiconductors. Journal of Applied Spectroscopy 69, 434–443 (2002). https://doi.org/10.1023/A:1019715602928
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DOI: https://doi.org/10.1023/A:1019715602928