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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...

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Related Experiment Video

Updated: Jun 1, 2026

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
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Three-dimensional nano-networked P3MT/PCBM solar cells.

He Gao1, Yixuan Chen, Yi Luo

  • 1Department of Electrical and Computer Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.

Nanotechnology
|June 10, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed efficient organic polymer solar cells using electrochemically grown 3D poly-3-methyl-thiophene (P3MT) nano-networks. This novel approach improved charge transport and achieved a 3.0% power conversion efficiency (PCE).

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Last Updated: Jun 1, 2026

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
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14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Area of Science:

  • Materials Science
  • Organic Electronics
  • Renewable Energy

Background:

  • Bulk heterojunctions are crucial for efficient organic polymer solar cells.
  • Traditional fabrication relies on phase segregation, often requiring annealing.
  • Achieving optimal donor/acceptor morphology and electrode contact is challenging.

Purpose of the Study:

  • To explore an alternative fabrication method for bulk heterojunction solar cells.
  • To utilize electrochemically grown 3D poly-3-methyl-thiophene (P3MT) nano-networks.
  • To improve charge dissociation and carrier collection efficiency.

Main Methods:

  • Electrochemical growth of porous, interconnected P3MT nano-structures on a gold electrode.
  • Infiltration of PCBM (acceptor) into the 3D P3MT (donor) nano-structure.
  • Formation of a bulk heterojunction without common annealing steps.

Main Results:

  • Demonstrated efficient exciton dissociation due to the 3D nano-network.
  • Achieved excellent continuity of both donor (P3MT) and acceptor (PCBM) phases.
  • Ensured proper connection of each phase to the electrodes for effective carrier collection.
  • Attained a power conversion efficiency (PCE) of 3.0%.

Conclusions:

  • Electrochemical fabrication of 3D P3MT nano-networks offers a viable route for efficient organic solar cells.
  • This method overcomes limitations of traditional annealing approaches.
  • The resulting morphology enhances charge separation and charge transport, leading to improved device performance.