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Internal Electric Field Behavior of Cadmium Zinc Telluride Radiation Detectors Under High Carrier Injection

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The behavior of the internal electric field of nuclear-radiation detectors substantially affects detector performance. We investigated the distribution of the internal field in cadmium zinc telluride (CZT) detectors under high carrier injection. We noted the build-up of a space-charge region near the cathode that produces a built-in field opposing the applied field. Its presence entails the collapse of the electric field in the rest of the detector, other than the portion near the cathode. Such a space-charge region originates from serious hole trapping in CZT. The device’s operating temperature greatly affects the width of the space-charge region. With increasing temperature from 5°C to 35°C, its width expanded from about one-sixth to one-half of the total depth of the detector.

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Authors and Affiliations

  1. Brookhaven National Laboratory, Upton, NY, 11973, USA

    G. Yang, A. E. Bolotnikov, G. S. Camarda, Y. Cui, A. Hossain, K. H. Kim, R. Gul & R. B. James

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  1. G. Yang
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  2. A. E. Bolotnikov
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  3. G. S. Camarda
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  4. Y. Cui
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  5. A. Hossain
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  6. K. H. Kim
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  7. R. Gul
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  8. R. B. James
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Correspondence to G. Yang.

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Yang, G., Bolotnikov, A.E., Camarda, G.S. et al. Internal Electric Field Behavior of Cadmium Zinc Telluride Radiation Detectors Under High Carrier Injection. J. Electron. Mater. 40, 1689–1692 (2011). https://doi.org/10.1007/s11664-011-1656-3

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  • DOI: https://doi.org/10.1007/s11664-011-1656-3

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