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A surface plasmon enabled liquid-junction photovoltaic cell.

Woo-ram Lee1, Syed Mubeen, Galen D Stucky

  • 1Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA. moskovits@chem.ucsb.edu.

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|March 6, 2015
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Summary
This summary is machine-generated.

This study introduces a novel plasmonic photovoltaic device utilizing a liquid junction and an iodide/triiodide redox couple. The device demonstrates promising photocurrent and stability, though efficiency is limited by light absorption in gold nanoparticle arrays.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Renewable Energy

Background:

  • Plasmonic nanosystems show potential as photovoltaics and in redox photochemistry.
  • Existing plasmonic devices offer tunable solar spectrum absorption and photocorrosion resistance but suffer from low efficiency.

Purpose of the Study:

  • To develop and characterize a plasmonic photovoltaic device using a liquid junction.
  • To investigate the performance and stability of such a device under solar radiation.

Main Methods:

  • Fabrication of a plasmonic photovoltaic device with a 25 μm thick electrolytic liquid junction.
  • Utilizing the iodide/triiodide (I-/I3-) redox couple.
  • Performance evaluation under AM 1.5 G solar radiation (100 mW cm(-2)).

Main Results:

  • The device achieved photocurrent densities exceeding 40 μA cm(-2).
  • An open circuit voltage (Voc) of approximately 0.24 V and a fill factor of around 0.5 were recorded.
  • The use of a liquid junction significantly improved long-term stability by reducing dielectric breakdown.

Conclusions:

  • Plasmonic photovoltaics with liquid junctions show potential for improved stability.
  • Low light absorption in gold nanoparticle arrays currently limits photocurrent and efficiency.
  • Further optimization of light absorption is crucial for enhancing plasmonic photovoltaic performance.