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P-N junction

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...

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Related Experiment Video

Updated: Jun 27, 2026

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Published on: June 18, 2013

Single nanowire photovoltaics.

Bozhi Tian¹, Thomas J Kempa, Charles M Lieber

¹Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.

Chemical Society Reviews

|December 18, 2008

Summary

This summary is machine-generated.

Semiconductor nanowires show promise for solar cells. Studies on single nanowire devices reveal potential for efficient photovoltaic applications and power sources for nanoelectronics.

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Area of Science:

Materials Science
Nanotechnology
Renewable Energy

Background:

Semiconductor nanowires are explored as key components for advanced photovoltaic devices.
Single nanowire investigations offer fundamental insights into device properties.
p-i-n dopant modulation in axial and coaxial geometries are central motifs.

Purpose of the Study:

To review recent advancements in semiconductor nanowire-based solar cells.
To examine fundamental properties and potential of single nanowire photovoltaic devices.
To discuss future opportunities for enhancing efficiency and applications.

Main Methods:

Review of synthesis techniques for axial and coaxial nanowire structures.
Analysis of studies on single axial and coaxial p-i-n silicon nanowire solar cells.
Discussion of controlled synthesis for complex nanowire architectures.

Main Results:

Demonstration of p-i-n dopant modulation in axial and coaxial nanowire geometries.
Insights into the performance characteristics of single nanowire solar cells.
Identification of challenges and opportunities for efficiency improvements.

Conclusions:

Semiconductor nanowires are promising building blocks for next-generation solar cells.
Controlled synthesis of complex nanowire structures is crucial for improved efficiency.
Nanowire-based devices hold potential as power sources for nanoelectronics.