Impurities behaviors in indium iodide materials

Sohee Leem, Seokjin Hwang, Hwanseung Yu, Yongsu Yoon, Kihyun Kim

Research output: Contribution to journalArticlepeer-review


Environmentally friendly 99.998%-pure indium iodide (InI), one candidate materials for the room-temperature operating radiation detector, was purified more than 250 times using the zone-refining method to reduce the impurities. Segregation coefficient of major positive and negative impurities of the purified InI ingot was analyzed using time-of-flight secondary ion mass spectroscopy. Electrical and spectroscopic properties of the purified Pd/InI/Pd detector were also determined. Planar Pd/InI/Pd detector showed the 59.5-keV gamma peak of Am-241 clearly. However, low-energy gamma peaks were buried in the noise. Mechanical or electrical degradation under an ambient condition was not observed for six months. Electrical resistivity and electron mobility-lifetime product of the multiple-refined InI were 4× 1011,Ωcm and 1.3× 10-3,cm2/V, respectively.

Original languageEnglish
Pages (from-to)909-912
Number of pages4
JournalIEEE Transactions on Nuclear Science
Issue number3
Publication statusPublished - 2018 Mar


  • Indium iodide (InI)
  • Pd/InI/Pd
  • pulse-height measurements
  • radiation detectors
  • segregation coefficients
  • time-of-flight secondary ion mass spectroscopy (ToF-SIMS)
  • zone refining

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


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