Overcoming Zn segregation in CdZnTe with the temperature gradient annealing

K. Kim, A. E. Bolotnikov, G. S. Camarda, A. Hossain, R. B. James

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The availability of large volume crystals with the same energy gap in melt-grown CdZnTe (CZT) is restricted due to the Zn segregation in CdTe hosts. We observed the migration of Zn in the solid phase along the positive temperature gradient direction both in situ and post-growth temperature gradient annealing (TGA) of CZT. Diffusivity of Zn obtained from the in situ TGA was approximately 10-5 cm2/s order and completely different mechanism with that of post-growth. The CZT ingots obtained through in situ TGA have uniform Zn and resistivity of 1010Ωcm orders. The CZT detectors fabricated from in situ TGA applied ingots exhibit 10% of energy resolution for 59.5 keV peak of 241Am.

Original languageEnglish
Pages (from-to)98-101
Number of pages4
JournalJournal of Crystal Growth
Volume442
DOIs
Publication statusPublished - 2016 May 15

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) ( NRF-2015M2B2A9032788 and NRF-2015M2A2A4A01045094 ) and the U.S. Department of Energy Office of Defense Nuclear Nonproliferation Research and Development, DNN R&D .

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

Keywords

  • A1. Segregation
  • A2. Bridgman technique
  • B1. Cadmium compounds
  • B2. Semiconducting II-VI materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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