Alkali metal chalcogenides for radiation detection

J. A. Peters*, Zhifu Liu, B. W. Wessels, I. Androulakis, C. P. Sebastian, Hao Li, M. G. Kanatzidis

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


We report on the optical and charge transport properties of novel alkali metal chalcogenides, Cs 2Hg 6S 7 and Cs 2Cd 3Te 4, pertaining to their use in radiation detection. Optical absorption, photoconductivity, and gamma ray response measurements for undoped crystals were measured. The band gap energies of the Cs 2Hg 6S 7 and Cs 2Cd 3Te 4 compounds are 1.63 eV and 2.45 eV, respectively. The mobility-lifetime products for charge carriers are of the order of ∼10 -3 cm 2/V for electrons and ∼10 -4 cm 2/V for holes. Detectors fabricated from the ternary compound Cs 2Hg 6S 7 shows well-resolved spectroscopic features at room temperature in response to γ-rays at 122 keV from a 57Co source, indicating its potential as a radiation detector.

Original languageEnglish (US)
Title of host publicationNuclear Radiation Detection Materials - 2011
Number of pages6
StatePublished - 2012
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 25 2011Apr 29 2011

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2011 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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