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Related Experiment Video

Updated: Dec 19, 2025

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Optimized active layer morphology toward efficient and polymer batch insensitive organic solar cells.

Kangkang Weng1, Linglong Ye1,2, Lei Zhu3

  • 1School of Chemistry, Beihang University, 100191, Beijing, PR China.

Nature Communications
|June 7, 2020
PubMed
Summary
This summary is machine-generated.

A novel two-step method improves organic solar cell (OSC) morphology control. This technique uses a polymer fibril network and non-fullerene acceptor to achieve high efficiency and batch insensitivity.

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Renewable Energy

Background:

  • Controlling morphology in organic solar cells (OSCs) is crucial for efficiency but challenging due to differing film-drying kinetics in lab vs. industrial processes.
  • Current methods struggle to achieve consistent, high-performance active layers suitable for large-scale OSC fabrication.

Purpose of the Study:

  • To develop a robust method for controlling the active layer morphology in organic solar cells (OSCs).
  • To enhance the efficiency and stability of OSCs by optimizing the active layer structure.
  • To address the issue of batch sensitivity in polymer morphology for OSC applications.

Main Methods:

  • A two-step sequential deposition technique was employed.
  • A conjugated polymer was used to form a self-assembled fibril network as the first layer.
  • A non-fullerene acceptor was introduced into the fibril mesh in the second step.

Main Results:

  • The sequential deposition resulted in an optimal morphology with a well-defined fibril network.
  • Organic solar cells fabricated using this method achieved a high power conversion efficiency of 16.5% (certified 16.1%).
  • The resulting morphology demonstrated robustness and insensitivity to polymer batch variations, a significant improvement for OSC fabrication.

Conclusions:

  • The developed two-step sequential deposition method effectively controls active layer morphology in OSCs.
  • Utilizing polymer fibril networks in this sequential process is a promising strategy for fabricating high-efficiency and stable OSCs.
  • This approach offers a viable solution for overcoming batch-to-batch variations in OSC manufacturing.