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Self-Regenerating Soft Biophotovoltaic Devices.

Xinkai Qiu1,2, Olga Castañeda Ocampo1,2, Hendrik W de Vries1

  • 1Zernike Institute for Advanced Materials , Nijenborgh 4 , 9747 AG Groningen , The Netherlands.

ACS Applied Materials & Interfaces
|October 9, 2018
PubMed
Summary

Researchers developed stretchable biophotovoltaic devices using photosystem I (PSI) complexes. These devices harness light energy and can self-regenerate, mimicking natural photosynthesis for sustainable energy.

Keywords:
EGaIncofabricationmicrofluidicsphotosystem Iself-assemblystretchable photovoltaics

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Area of Science:

  • Biophysics
  • Materials Science
  • Renewable Energy

Background:

  • Photosystem I (PSI) complexes are crucial for photosynthesis, converting light energy into electrical signals.
  • Developing efficient and stable biophotovoltaic devices remains a challenge.

Purpose of the Study:

  • To fabricate soft, stretchable biophotovoltaic devices using oriented PSI complexes.
  • To investigate self-assembly and regeneration mechanisms for enhanced device longevity.

Main Methods:

  • Self-assembly of PSI complexes onto gold electrodes with preferred orientation.
  • Utilizing liquid eutectic gallium-indium (EGaIn) for microfluidic pseudochannels and electrodes.
  • Employing shadow evaporation to increase electrode surface area.
  • Circulating active PSI solutions for device regeneration.

Main Results:

  • Fabrication of soft, stretchable biophotovoltaic devices with photocurrent generation.
  • Demonstration of charge collection via direct electron injection and hole transport.
  • Achieved significant increase in electrode surface area using shadow evaporation.
  • Observed device self-regeneration through mass action/self-assembly of PSI complexes.

Conclusions:

  • The developed devices demonstrate efficient photocurrent generation and self-regeneration capabilities.
  • The fabrication strategy leverages simple techniques for complex functionality in biophotovoltaics.
  • These findings highlight the potential of PSI-based devices for sustainable energy applications.