Ion-beam-induced damage formation in CdTe

Journal Article · Wed Jun 01 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3592265· OSTI ID:21538404

Rischau, C W; Schnohr, C S; Wendler, E; Wesch, W ^[1]

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1. Institut fuer Festkoerperphysik, Friedrich-Schiller-Universitaet Jena, Max-Wien-Platz 1, D-07743 Jena (Germany)

Damage formation in <111>- and <112>-oriented CdTe single crystals irradiated at room temperature and 15 K with 270 keV Ar or 730 keV Sb ions was investigated in situ using Rutherford backscattering spectroscopy (RBS) in channeling configuration. Defect profiles were calculated from the RBS spectra using the computer code DICADA and additional energy-dependent RBS measurements were performed to identify the type of defects. At both temperatures no formation of a buried amorphous layer was detected even after prolonged irradiation with several 10{sup 16} ions/cm{sup 2}. The fact that CdTe is not rendered amorphous even at 15 K suggests that the high resistance to amorphization is caused by the high ionicity of CdTe rather than thermal effects. The calculated defect profiles show the formation of a broad defect distribution that extends much deeper into the crystal than the projected range of the implanted ions at both temperatures. The post-range defects in CdTe thus do not seem to be of thermal origin either, but are instead believed to result from migration driven by the electronic energy loss.

• OSTI ID: 21538404
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 11; Other Information: DOI: 10.1063/1.3592265; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
AMORPHOUS STATE
ANTIMONY IONS
CADMIUM TELLURIDES
CHANNELING
CRYSTAL DEFECTS
DISLOCATIONS
DISTRIBUTION
ENERGY DEPENDENCE
ENERGY LOSSES
ION BEAMS
ION IMPLANTATION
IRRADIATION
KEV RANGE 100-1000
MONOCRYSTALS
PHYSICAL RADIATION EFFECTS
RADIATION DOSES
RUTHERFORD BACKSCATTERING SPECTROSCOPY
SPECTRA
TEMPERATURE RANGE 0273-0400 K
BEAMS
CADMIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL STRUCTURE
CRYSTALS
DOSES
ENERGY RANGE
IONS
KEV RANGE
LINE DEFECTS
LOSSES
RADIATION EFFECTS
SPECTROSCOPY
TELLURIDES
TELLURIUM COMPOUNDS
TEMPERATURE RANGE