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Self-sustaining thermophotonic circuits.

Bo Zhao1,2, Siddharth Buddhiraju1,2, Parthiban Santhanam1,2

  • 1Department of Electrical Engineering, Stanford University, Stanford, CA 94305.

Proceedings of the National Academy of Sciences of the United States of America
|May 24, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a self-sustaining thermophotonic circuit using series-connected light-emitting diodes. This breakthrough significantly boosts power density for photon-based heat-to-electricity conversion, advancing renewable energy applications.

Keywords:
electronic circuitsrenewable energythermodynamicsthermophotonics

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Area of Science:

  • Energy Conversion
  • Optoelectronics
  • Thermodynamics

Background:

  • Photons are key heat carriers, making photon-to-electricity conversion vital for renewable energy.
  • Existing thermophotovoltaic systems suffer from low power density, even with advanced techniques.
  • Thermophotonic systems offer higher power density potential but face thermodynamic challenges in achieving self-sustaining circuits.

Purpose of the Study:

  • To overcome the thermodynamic limitations in designing self-sustaining thermophotonic circuits.
  • To significantly enhance power density in photon-based heat-to-electricity conversion.
  • To explore novel heat engine designs utilizing light as the working medium.

Main Methods:

  • Introduced a novel configuration connecting light-emitting diodes in series.
  • Enabled multiple photon generation from a single injected electron.
  • Designed a self-sustaining thermophotonic circuit for steady-state power generation.

Main Results:

  • Achieved a self-sustaining thermophotonic circuit.
  • Demonstrated steady-state power density exceeding thermophotovoltaic systems by orders of magnitude.
  • Showcased flexibility in controlling electron and photon flux.

Conclusions:

  • The proposed thermophotonic circuit design overcomes previous limitations in power density.
  • This work opens possibilities for light-based heat engines.
  • The control over electron-photon flux relations has broad implications for optoelectronics energy technology.