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A comparison of the diffusion of iodine into CdTe, Hg0.8Cd0.2Te and Zn0.05Cd0.95Te

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Abstract

Studies on the diffusion of iodine into CdTe, mercury cadmium telluride (Hg0.8Cd0.2Te, referred to as MCT) and zinc cadmium telluride (Zn0.5Cd0.95Te, referred to as ZCT) in the temperature range of 20 to 600°C are compared and discussed. The concentration profiles were measured using a radiotracer sectioning technique. As with the diffusion studies using the halogens into CdTe, the profiles were composed of four parts to which a computer package consisting of the sum of four complementary error functions (erfc) gave satisfactory fits. The diffusivity for the diffusion of iodine into MCT was faster than for the diffusion into CdTe, which was faster than for the diffusion into ZCT. The high diffusivity for the fastest profile part at 20°C indicates that when iodine is diffused from the vapor into these materials, it is not a suitable long term stable dopant in devices where sharp junctions are required.

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Authors and Affiliations

  1. School of Natural and Environmental Sciences, Coventry University, CV1 5FB, Coventry, UK

    E. D. Jones & J. Malzbender

  2. DRA Electronics Division, RSRE, St. Andrews Road, WR14 3PS, Great Malvern, Worcester, UK

    N. Shaw

  3. GEC Marconi Infra-Red, P.O.Box 217, S015 OEG, Millbrook, Southhampton, UK

    P. Capper

  4. Electronic Materials Consultant, The Hoo, Brockhill Road, WR14 4DL, West Malvern, Worcester, UK

    J. B. Mullin

Authors
  1. E. D. Jones
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  2. J. Malzbender
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  3. N. Shaw
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  4. P. Capper
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  5. J. B. Mullin
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Jones, E.D., Malzbender, J., Shaw, N. et al. A comparison of the diffusion of iodine into CdTe, Hg0.8Cd0.2Te and Zn0.05Cd0.95Te. J. Electron. Mater. 24, 1225–1229 (1995). https://doi.org/10.1007/BF02653078

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  • DOI: https://doi.org/10.1007/BF02653078

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