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Ionic conductor with high conductivity as single-component electrolyte for efficient solid-state dye-sensitized solar

Hong Wang1, Juan Li, Feng Gong

  • 1Department of Chemistry, Lab of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Songhu Road 2205, 200438 Shanghai, PR China.

Journal of the American Chemical Society
|August 6, 2013
PubMed
Summary
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New solid electrolytes with a propargyl group enable efficient, additive-free solid-state dye-sensitized solar cells (DSSCs). These materials offer high conductivity for stable, single-component electrolytes, advancing solar energy technology.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Iodine-based dye-sensitized solar cells (DSSCs) often rely on imidazolium iodide, but its low conductivity limits efficiency without iodine.
  • Current DSSCs require additives or post-treatments, complicating fabrication and potentially reducing stability.

Purpose of the Study:

  • To develop high-conductivity, single-component solid electrolytes for efficient solid-state dye-sensitized solar cells.
  • To investigate the impact of N-substituted propargyl groups on ionic conductivity and device performance.

Main Methods:

  • Synthesis of lamellar solid iodide salts of imidazolium or piperidinium with N-substituted propargyl groups.
  • Fabrication and testing of solid-state DSSCs using these novel electrolytes without additives.

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  • Conductivity measurements and long-term stability testing under simulated solar illumination.

    • Main Results:

    • The propargyl group significantly enhanced ionic conductivity by approximately 4 × 10(4)-fold compared to alkyl-substituted imidazolium iodide.
    • A solid-state DSSC utilizing 1-propargyl-3-methylimidazolium iodide achieved a power conversion efficiency of 6.3%.
    • The device demonstrated excellent long-term stability, maintaining performance after 1500 hours of continuous 1 sun soaking.

    Conclusions:

    • Lamellar solid iodide salts with propargyl groups serve as effective single-component solid electrolytes for high-performance solid-state DSSCs.
    • The developed electrolytes enable efficient, additive-free DSSC operation, paving the way for stable and practical solar cells.
    • This research highlights a promising strategy for advancing solid-state electrolytes in photovoltaic applications.