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2016 Vol.26, Issue 8 Preview Page
Contact Area-Dependent Electron Transport in Au/n-type Ge Schottky Junction
Hogyoung Kim12†
,
Da Hye Lee1
,
Hye Seon Myung1
1Department of Visual Optics, Seoul National University of Science and Technology (Seoultech), Seoul 01811, Republic of Korea
2Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology (Seoultech), Seoul 01811, Republic of Korea
†Corresponding author hogyoungkim@gmail.com (H. Kim, Seoultech)
August 2016. pp. 412-416
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Abstract

The electrical properties of Au/n-type Ge Schottky contacts with different contact areas were investigated using current-voltage (I-V) measurements. Analyses of the reverse bias current characteristics showed that the Poole-Frenkel effect became strong with decreasing contact area. The contribution of the perimeter current density to the total current density was found to increase with increasing reverse bias voltage. Fitting of the forward bias I-V characteristics by considering various transport models revealed that the tunneling current is dominant in the low forward bias region. The contributions of both the thermionic emission (TE) and the generation-recombination (GR) currents to the total current were similar regardless of the contact area, indicating that these currents mainly flow through the bulk region. In contrast, the contribution of the tunneling current to the total current increased with decreasing contact area. The largest E00 value (related to tunneling probability) for the smallest contact area was associated with higher tunneling effect.

Keywords
n-type Ge
contact areas
perimeter current
tunneling current.
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 26
  • No :8
  • Pages :412-416
  • Received Date : 2016-06-16
  • Revised Date : 2016-06-30
  • Accepted Date : 2016-07-01
  • DOI :https://doi.org/10.3740/MRSK.2016.26.8.412
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