Effectiveness of parylene coating on CdZnTe surface after optimal passivation
- 주제(키워드) CdZnTe , Parylene , Passivation , Hydrogen peroxide , Ammonium fluoride
- 발행기관 한국원자력학회
- 발행년도 2022
- 총서유형 Journal
- DOI http://dx.doi.org/10.1016/j.net.2022.08.016
- KCI ID ART002902901
- 본문언어 영어
초록/요약
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 mm) is adopted, parylene is a promising protection layer thereby ensuring the performance and long-term stability of CZT detectors.
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