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Effect of electron irradiation on the properties of germanium-doped gallium arsenide

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Abstract

The Hall effect, electrical conductivity (77–370 K), and photoluminescence spectra (77 K) are studied in single-crystals of nuclearly doped GaAs (NDG) and GaAs doped with Ge by the metallurgical method after irradiation by electrons (E= 1 MeV, D=1.1·1015–3.8·1018 cm−2). Initial electron concentrations were n= 1.7·1017 cm−3 and n0=2.6·1017 cm−3 respectively. In the GaAs doped during crystal growth by the Czochralski method the degree of compensation related to the amphoteric impurity Ge is higher (K=0.8) than in the NDG (K=0.4) for identical initial electron concentration. It was established that the rate of charge carrier removal in GaAs<Ge> is lower than in NDG, while radiation defects are more thermostable in NDG. The energy spectrum of radiation defects and radiating recombination centers, and the basic steps in reestablishment of electrophysical and optical properties in GaAs<Ge> and NDG are similar, i.e., they do not depend on the method of germanium doping.

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 82–86, April, 1991.

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Brudnyi, V.N., Budnitskii, D.L., Kolin, N.G. et al. Effect of electron irradiation on the properties of germanium-doped gallium arsenide. Soviet Physics Journal 34, 348–352 (1991). https://doi.org/10.1007/BF00898102

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Keywords

  • Electrical Conductivity
  • GaAs
  • Gallium
  • Germanium
  • Hall Effect