Long-term stability of ammonium-sulfide- and ammonium-fluoride-passivated CdMnTe detectors

K. H. Kim, R. Tappero, A. E. Bolotinikov, A. Hossain, G. Yang, R. B. James, P. Fochuk

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We evaluated the long-term stability of CdMnTe (CMT) detectors treated with ammonium-saltbased passivants. Passivation improved the detector’s stability and reduced the degradation of its energy resolution with time. Here, we stored passivated 5 × 5 × 9 mm3 CMT detectors in an ambient environment for 550 days and evaluated the effects of aging by measuring their pulse-height spectra over time. The CMT detector passivated with ammonium fluoride exhibited a higher leakage current after 550 days, and its performance was degraded accordingly. Our analyses of the leakage current for a pixelated CMT detector revealed that the edges and the corners of the detector were responsible for the higher leakage, which resulted from a degradation of the passivation layer in those areas. Assurance of the long-term stability and reproducibility of the detector necessitates that the edges and the corners be mechanically passivated following chemical treatment.

Original languageEnglish
Pages (from-to)1532-1536
Number of pages5
JournalJournal of the Korean Physical Society
Issue number10
Publication statusPublished - 2015 May 8


  • Ammonium fluoride
  • Ammonium sulfide
  • CdMnTe
  • Passivation
  • Stability

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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