Photoluminescence investigation of p-to-n conversion in CdTe by annealing in Cd atmosphere

P. Horodyský, E. Belas, J. Franc, R. Grill, P. Hlídek, A. L. Tóth

Research output: Contribution to journalConference article

Abstract

The p-to-n conversion of CdTe single crystals caused by low temperature annealing in cadmium atmosphere is investigated by photoluminescence (PL), electron beam induced current method (EBIC) and galvanomagnetic measurements. We show that PL of excitons bound to silver, copper and sodium neutral acceptors in the converted n-type exhibits drastic reduction (about three orders of magnitude) comparing to unconverted p-type or as grown crystal. Simultaneously, we observe that cadmium substitutional acceptors diffuse fast interstitially into remaining p-type, where they recombine with Cd vacancies and accumulate in the sample core. Concentration of donors is only slightly modified. This effect has a potential application in preparation of pure n-type CdTe samples.

Original languageEnglish
Pages (from-to)4478-4480
Number of pages3
JournalIEEE Nuclear Science Symposium Conference Record
Volume7
Publication statusPublished - Dec 1 2004
Event2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors - Rome, Italy
Duration: Oct 16 2004Oct 22 2004

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ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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