Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Effectiveness of parylene coating on CdZnTe surface after optimal passivation

  • B. Park (Dept. of Health and Safety Convergence Science, Korea University) ;
  • Y. Kim (Interdisciplinary Program in Precision Public Health, Korea University) ;
  • J. Seo (Dept. of Health and Safety Convergence Science, Korea University) ;
  • K. Kim (School of Health and Environmental Science, Korea University)
  • Received : 2022.04.18
  • Accepted : 2022.08.16
  • Published : 2022.12.25
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Abstract

Parylene coating was adopted on CdZnTe (CZT) detector as a mechanical protection layer after wet passivation with hydrogen peroxide (H2O2) and ammonium fluoride (NH4F). Wet chemical passivant lose their effectiveness when exposed to the ambient conditions for a long time. Parylene coating could protect the effectiveness of passivation, by mechanically blocking the exposure to the ambient conditions. Stability of CZT detector was tested with the measurement of leakage current density and response to radio-isotopes. When the enough thickness of parylene (>100 ㎛) is adopted, parylene is a promising protection layer thereby ensuring the performance and long-term stability of CZT detectors.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No.2018M2A2B3A01072384) and by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20214000000070, Promoting of expert for energy industry advancement in the field of radiation technology).

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