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Multi-source/component spray coating for polymer solar cells.

Li-Min Chen1, Ziruo Hong, Wei Lek Kwan

  • 1Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA.

ACS Nano
|August 10, 2010
PubMed
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A novel alternating spray coating method fabricates polymer solar cells with well-defined domains. This technique enables efficient charge transport and processing of diverse materials for enhanced solar cell performance.

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Conventional solution processing for polymer solar cells faces limitations due to solvent compatibility.
  • Fabricating well-defined photoactive layers with interpenetrating donor/acceptor networks is crucial for efficient charge transport.

Purpose of the Study:

  • To demonstrate a multi-source/component spray coating process for fabricating polymer solar cell photoactive layers.
  • To overcome solvent limitations in conventional methods and enable processing of a wider range of materials.
  • To explore the potential for creating tandem structures and enhancing photoresponse.

Main Methods:

  • Alternating spray deposition of polymer:fullerene blends under ambient conditions.
  • Fabrication of multi-component films without requiring a common solvent.

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Last Updated: Jun 10, 2026

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  • Characterization of layer morphology and device performance.

    • Main Results:

    • Achieved well-defined polymer:fullerene heterojunction domains and an interpenetrating donor/acceptor network.
    • Demonstrated polymer solar cells with a power conversion efficiency of 2.8% using poly(3-hexylthiophene):[6,6]-phenyl C(61) butyric acid methyl ester.
    • Showcased the ability to independently select optimal solvents for donor and acceptor materials.
    • Enabled direct stacking of multiple photoactive polymers for tandem structures.

    Conclusions:

    • The alternating spray coating method provides structural flexibility and tenability for polymer solar cell applications.
    • This approach overcomes solvent limitations and enables processing of diverse materials, leading to efficient photoactive layers.
    • The technique facilitates the creation of advanced solar cell architectures, including tandem structures, for improved performance.