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Related Concept Videos

P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
Schottky Barrier Diode01:27

Schottky Barrier Diode

Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...

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Related Experiment Video

Updated: May 31, 2026

Well-aligned Vertically Oriented ZnO Nanorod Arrays and their Application in Inverted Small Molecule Solar Cells
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Solution-processed germanium nanowire-positioned Schottky solar cells.

Ju-Hyung Yun1, Yun Chang Park, Joondong Kim

  • 1Nano-Mechanical Systems Research Center, Korea Institute of Machinery and Materials (KIMM), Daejeon 305343, Korea. joonkim@kimm.re.kr.

Nanoscale Research Letters
|June 30, 2011
PubMed
Summary

Researchers developed a germanium nanowire (GeNW) Schottky solar cell using a simple solution process. This cost-effective method creates a nanostructure solar architecture with potential for efficient energy conversion.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Renewable Energy

Background:

  • Germanium nanowires (GeNWs) offer unique electronic properties for nanoscale devices.
  • Developing cost-effective fabrication methods for nanostructure solar cells is crucial for renewable energy advancement.

Purpose of the Study:

  • To fabricate a germanium nanowire-positioned Schottky solar cell using a solution process.
  • To investigate the electrical characteristics of Schottky and ohmic contacts formed by GeNWs and different metal electrodes.
  • To assess the potential of this approach for low-cost solar energy harvesting.

Main Methods:

  • A solution-based method was employed to deposit GeNWs onto asymmetric metal electrodes.
  • Fabrication of a GeNW-positioned Schottky solar cell.
  • Characterization of current-voltage (I-V) properties under illumination.
  • Systematic investigation of Schottky and ohmic contacts between single GeNWs and various metal electrodes.

Main Results:

  • A rectifying current flow was achieved by spreading a GeNW-containing solution onto asymmetric metal electrodes.
  • The fabricated GeNW Schottky solar cell demonstrated an open-circuit voltage of 177 mV and a short-circuit current of 19.2 nA under one-sun illumination.
  • Understanding of contact properties between GeNWs and different metals was enhanced.

Conclusions:

  • The solution process is a viable route for fabricating GeNW-positioned Schottky solar cells.
  • This method shows promise for developing cost-effective nanostructure solar architectures.
  • Further research into optimizing contact properties could improve solar cell efficiency.