Tl-based wide gap semiconductor materials for x-ray and gamma ray detection

Zhifu Liu, J. A. Peters, C. Zang, Nam Ki Cho, Bruce W. Wessels, Simon Johnsen, Sebastian Peter, John Androulakis, Mercouri G. Kanatzidis, Jung Hwan Song, Hosub Jin, Arthur J. Freeman

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

5 Citations (Scopus)

Abstract

The optical and electronic properties of Tl-chalcogenide, wide gap semiconductors, TlGaSe2, Tl6I4Se, and Tl 2Au4S3 for x-ray and γ ray detection were characterized. The semiconductor crystals are grown by the modified Bridgman method. The optical absorption and band gap energy of the materials were determined from UV-Vis-near IR transmission and reflection spectra. The mobility-lifetime products were measured. For Tl6I4Se the values were comparable to those of CdZnTe. We measured room temperature detector response to x-ray and γ ray radiations. Under 57Co radiation, Tl6I4Se has a well-resolved spectral response and peak FWHM comparable to those of Cd0.9Zn0.1Te.

Original languageEnglish
Title of host publicationChemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
DOIs
Publication statusPublished - Jul 21 2011
EventChemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII - Orlando, FL, United States
Duration: Apr 26 2011Apr 28 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8018
ISSN (Print)0277-786X

Other

OtherChemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
CountryUnited States
CityOrlando, FL
Period4/26/114/28/11

Keywords

  • Photoconductivity
  • Tl-chalcogenide
  • Wide gap semiconductor
  • X-ray detector

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Liu, Z., Peters, J. A., Zang, C., Cho, N. K., Wessels, B. W., Johnsen, S., Peter, S., Androulakis, J., Kanatzidis, M. G., Song, J. H., Jin, H., & Freeman, A. J. (2011). Tl-based wide gap semiconductor materials for x-ray and gamma ray detection. In Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII [80180H] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8018). https://doi.org/10.1117/12.883230