7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

Characterization of Temperature Dependence of the Electron Capture Cross Section of E-Center in Sb-Doped Germanium

9 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: A.274
Poster Presentation Track A - Division for Physics of Condensed Matter and Materials Poster2

Speaker

Mr Ezekiel Omotoso (University of Pretoria)

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

The temperature dependent capture cross section of the E-center in Ge after intentionally irradiating the sample by alpha particle has been investigated. Ohmic contact and Schottcky diodes were deposited of n-type Sb-doped Ge by resistive evaporation. DLTS measurements were made by high resolution Laplace DLTS. From an Arrhenius plot, we found that the thermal emission of the E-center had activation energy of (0.370±0.001) eV and an apparent capture cross section of 2.22×〖10〗^(-15) cm^2. For a constant filling pulse width, the height of the DLTS peak due to the E-centre increased with increasing temperature. This is the evidence that the E-center has a temperature activated capture cross section. The capture barrier energy and true capture cross section of Ge E-center have been determined to be (0.052±0.003) eV and (2.25±0.05)×〖10〗^(-17) cm^2 respectively

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Main supervisor (name and email)<br>and his / her institution

Prof. W. E. Meyer
wmeyer@up.ac.za
University of Pretoria

Primary author

Mr Ezekiel Omotoso (University of Pretoria)

Co-authors

Prof. Danie Auret (University of Pretoria) Mr Phuti Ngoepe (University of Pretoria) Mr Sergei Coelho (UP) Prof. Walter Meyer (University of Pretoria)

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