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Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
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A circulating electrolyte for a high performance carbon-based dye-sensitized solar cell.

Shuai Gu1, Enbing Bi, Bitian Fu

  • 1Graduate School of Engineering, The University of Tokyo, 113-8656, Japan.

Chemical Communications (Cambridge, England)
|May 6, 2017
PubMed
Summary

Researchers developed a novel platinum-free counter electrode for dye-sensitized solar cells (DSCs). Circulating the electrolyte significantly boosted power conversion efficiency by improving mass transfer and reducing charge recombination.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Dye-sensitized solar cells (DSCs) are a promising photovoltaic technology.
  • Platinum-based counter electrodes are standard but costly.
  • Efficient mass transfer and minimal charge recombination are crucial for high DSC performance.

Purpose of the Study:

  • To develop a cost-effective, platinum-free counter electrode for DSCs.
  • To investigate the impact of circulating electrolyte on DSC performance.
  • To enhance power conversion efficiency by optimizing mass transfer and charge dynamics.

Main Methods:

  • Fabrication of a novel platinum-free counter electrode.
  • Implementation of a circulating electrolyte system within the DSC.
  • Electrochemical characterization to assess charge recombination and electron lifetime.
  • Performance testing of DSCs with stationary versus circulating electrolytes.

Main Results:

  • The novel counter electrode enabled efficient electrolyte circulation.
  • Circulating electrolyte significantly enhanced mass transfer.
  • Charge recombination was greatly suppressed with the circulating electrolyte.
  • Electron lifetime was considerably increased, leading to higher power conversion efficiency.

Conclusions:

  • A platinum-free counter electrode with a circulating electrolyte system offers a viable alternative to conventional DSC designs.
  • This approach effectively mitigates charge recombination and enhances electron lifetime.
  • The developed system demonstrates potential for significantly improving DSC power conversion efficiency and reducing costs.