Type conversion of polycrystalline CdZnTe thick films by multiple compensation

Ki Hyun Kim, Shin Hang Cho, Jong Hee Seo, Jae Ho Won, Jin Ki Hong, Sun Ung Kim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The multiple compensated polycrystalline CdZnTe thick films have been deposited by thermal evaporation method. The heavy metals of Pb and Sn have been co-doped with Cl in order to fully compensate Cd vacancies in polycrystalline CdZnTe films due to the limited solubility of Cl in CdZnTe. The drastic variations of the resistivity and conduction type in the CdZnTe films were observed by doping with heavy metals. The intensity of A-center levels, which are normally found in a compensated single CdZnTe crystal, was decreased along with the increase of resistivity in polycrystalline CdZnTe samples. The electron mobility is about 88 cm2 / Vs, and a well resolved gamma ray spectrum of 241Am has been observed for these polycrystalline CdZnTe thick films for the first time.

Original languageEnglish
Pages (from-to)191-195
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume584
Issue number1
DOIs
Publication statusPublished - 2008 Jan 1

Keywords

  • Heavy metal doping
  • Multiple compensation
  • Polycrystalline CdZnTe
  • Semi-insulating
  • Thick films
  • Type conversion
  • X-ray detector

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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