Skip to main content
    • Aa
    • Aa

Characterization of Pd Impurities and Finite-Sized Defects in Detector Grade CdZnTe

  • M.C. Duff (a1), J.P. Bradley (a2), Z.R. Dai (a2), N. Teslich (a2), A. Burger (a3), M. Groza (a3) and V. Buliga (a3)...

Synthetic CdZnTe or “CZT” crystals are highly suitable for γ-spectrometers operating at the room temperature. Secondary phases (SP) in CZT are known to inhibit detector performance, particularly when they are present in large numbers or dimensions. These SP may exist as voids or composites of non-cubic phase metallic Te layers with bodies of polycrystalline and amorphous CZT material and voids. Defects associated with crystal twining may also influence detector performance in CZT. Using transmission electron microscopy, we identify two types of defects that are on the nano scale. The first defect consists of 40 nm diameter metallic Pd/Te bodies on the grain boundaries of Te-rich composites. Although the nano-Pd/Te bodies around these composites may be unique to the growth source of this CZT material, noble metal impurities like these may contribute to SP formation in CZT. The second defect type consists of atom-scale grain boundary dislocations. Specifically, these involve inclined “finite-sized” planar defects or interfaces between layers of atoms that are associated with twins. Finite-sized twins may be responsible for the subtle but observable striations that can be seen with optical birefringence imaging and synchrotron X-ray topographic imaging.

Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

4.J. Shen , D. K. Aidun , L. Regel , and W. R. Wilcox . Cryst. Growth 132, 250260 (1993).

5.T. Wang , W. Jie , and D. Zeng . Mater. Sci. Engin. A 472, 227230 (2008).

7.D. Zeng , W. Jie , T. Wang , and H. Zhou . J. Crystal Growth 311, 44144417 (2009).

10.M. C. Duff , K. G. Lynn , K. Jones , Z. R. Dai , J. P. Bradley , and N. Teslich . SPIE Proc. 7449 74490N (2009) (oral and written publications).

11.L. Li , F. Lu , C. Lee , G. Wright , D. R. Rhiger , S. Sen , K. S. Shah , M. R. Squillante , L. Cirinano , R. B. James , A. Burger , P. Luke , and R. Olson . SPIE Proc. 4784, 76 (2003).

12.M. C. Duff , D. B. Hunter , P. Nuessle , D. R. Black , H. Burdette , J. Woicik , A. Burger , and M. Groza . J. Elect. Mater. 36, 10921097 (2007).

13.S. A. Awadalla , J. Mackenzie , H. Chen , B. Redden , G. Bindley , M. C. Duff , A. Burger , M. Groza , V. Buliga , J. P. Bradley , Z. R. Dai , N. Teslich , and D. R. Black . J. Crystal Growth 312, 507513 (2010).

14.M. C. Duff , D. B. Hunter , A. Burger , M. Groza , V. Buliga , and D. R. Black . Appl. Surf. Sci. 254, 28892892 (2008).

15.M. Harada , K. Asakura , Y. Ueki , and N. Toshima . J. Phys. Chem. 96, 97309738. (1992).

16.H. Okamoto . J. Phase Equilibria 13, 7379 (1992).

18.E. A. Marquis , J. C. Hamilton , D. L. Medlin , and F. Leonard . Phys. Rev. Lett. 93, 14 (2004).

19.E. A. Marquis , D. L. Medlin , and F. Leonard . Acta Materialia 55, 59175923 (2007).

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *