Effects of dislocations and sub-grain boundaries on X-ray response maps of CdZnTe radiation detectors

A. Hossain, A. E. Bolotnikov, G. S. Camarda, Y. Cui, R. Gul, K. Kim, B. Raghothamachar, G. Yang, R. B. James

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

1 Citation (Scopus)


The imperfect quality of CdZnTe (CZT) crystals for radiation detectors seriously diminishes their suitability for different applications. Dislocations and other dislocation-related defects, such as sub-grain boundaries and dislocation fields around Te inclusions, engender significant charge losses and, consequently, cause fluctuations in the detector's output signals, thereby hindering their spectroscopic responses. In this paper, we discuss our results from characterizing CZT material by using a high-spatial-resolution X-ray response mapping system at BNL's National Synchrotron Light Source. In this paper, we emphasize the roles of these dislocation-related defects and their contributions in degrading the detector's performance. Specifically, we compare the effects of the sub-grain- and coherent twin-boundaries on the X-ray response maps.

Original languageEnglish
Title of host publicationNuclear Radiation Detection Materials - 2011
Number of pages5
Publication statusPublished - 2012
Externally publishedYes
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: 2011 Apr 252011 Apr 29

Publication series

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


Conference2011 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA

Bibliographical note

Funding Information:
This work was supported by U.S. Department of Energy, Office of Nonproliferation Research and Development, NA-22, and the Defense Threat Reduction Agency (DTRA).


  • CdZnTe
  • Crystal defects
  • Dislocations
  • Radiation detectors

ASJC Scopus subject areas

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


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