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http://dx.doi.org/10.1016/j.net.2022.08.016

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)
Publication Information
Nuclear Engineering and Technology / v.54, no.12, 2022 , pp. 4693-4697 More about this Journal
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
CdZnTe; Parylene; Passivation; Hydrogen peroxide; Ammonium fluoride;
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Times Cited By KSCI : 2  (Citation Analysis)
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