22-30 July 2021
North-West University
Africa/Johannesburg timezone
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High resolution Laplace deep-level transient spectroscopy characterization of radiation induced defects in germanium.

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Potchefstroom Campus (North-West University)

Potchefstroom Campus

North-West University

Poster Presentation Track F - Applied Physics Applied Physics


Cambel Thaba (Department of physics, University of Pretoria)


In this study we used high resolution Laplace Deep-Level Transient Spectroscopy (L-DLTS) to study the electrical properties of the E and Eˊ defects in germanium (Ge) which are introduced by alpha particle radiation. Current-voltage and capacitance-voltage measurements reveal a decrease in the quality of the devices fabricated on the radiated samples. The activation energies for these defects were found to be 0.370eV and 0.375eV, respectively. The electric field dependence of these defects was measured, and the capture cross-sections were measured from varying pulse width.

Keywords: Alpha radiation induced defects in Ge; Laplace Deep-Level Transient Spectroscopy; Electric field; Capture cross-section.

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Primary author

Cambel Thaba (Department of physics, University of Pretoria)


Dr Fatemeh Taghizadeh (Department of physics, University of Pretoria) Prof. Danie Auret (Department of physics, University of Pretoria) Prof. Mmantsae Diale (Department of physics, University of Pretoria)

Presentation Materials