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Behavior of copper in CdGeAs2 crystals

  • Valeriy G. Voevodin (a1), Olga V. Voevodina (a1), Svetlana A. Bereznaya (a1), Zoya V. Korotchenko (a1), Melvin C. Ohmer (a2), Jonathan T. Goldstein (a2) and Nils C. Fernelius (a2)...

Abstract

We present an investigation of the diffusion and melt doping of Cu in CdGeAs2. Cu was found to be an acceptor, its introduction in the melt allowed the controlled introduction of holes from ∼8·1016 cm-3 to ∼1·1018 cm -3. Introduction of Cu from the melt was also found to improve the homogeneity of the crystal. The saturation solubility of Cu introduced via diffusion doping was found to have an exponential dependence on the diffusion temperature, from 723 K to 873 K, obeying the equation N = N0 exp (- δH / kT) with the parameters N0 = 6.10+19 cm-3, δH = 0.3 eV, and k equal to Boltzman's constant. From 873 K to 923 K, the saturation solubility was found to decrease exponentially with temperature.

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References

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1. Bokiy, G.F., Crystal-Chemistry (Nauka, Moscow, 1971)
2. Semiconductors A2B4C5 2 , ed. by Goryunova, N.A., Valov, Yu.A. (Sovetskoe Radio, Moscow, 1974)
3. Shishiyanu, F.S., Diffusion and degradation in semiconductor materials and devices (Shtiintsa, Kishinyov, 1978)
4. Boltaks, B.I., Diffusion in semiconductors (FIZMATGIZ, Moscow, 1961)

Behavior of copper in CdGeAs2 crystals

  • Valeriy G. Voevodin (a1), Olga V. Voevodina (a1), Svetlana A. Bereznaya (a1), Zoya V. Korotchenko (a1), Melvin C. Ohmer (a2), Jonathan T. Goldstein (a2) and Nils C. Fernelius (a2)...

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