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Related Experiment Videos

A Solution Processable High-Performance Thermoelectric Copper Selenide Thin Film.

Zhaoyang Lin1, Courtney Hollar2, Joon Sang Kang3

  • 1Department of Chemistry and Biochemistry, California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA.

Advanced Materials (Deerfield Beach, Fla.)
|April 4, 2017
PubMed
Summary

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Researchers developed a flexible thermoelectric copper selenide (Cu2 Se) thin film using a low-cost method. This material offers high performance for flexible electronics and energy harvesting applications.

Area of Science:

  • Materials Science
  • Solid-State Physics
  • Energy Harvesting

Background:

  • Thermoelectric devices offer quiet, emission-free operation for cooling and power generation.
  • Flexible thermoelectric energy harvesters are crucial for powering wearable electronics and sensors.
  • Existing flexible thermoelectric materials often lack high performance or rely on expensive elements.

Purpose of the Study:

  • To develop a low-cost, high-performance flexible thermoelectric thin film using earth-abundant materials.
  • To demonstrate a scalable fabrication process for flexible thermoelectric devices.
  • To evaluate the thermoelectric properties and mechanical stability of the fabricated thin film.

Main Methods:

  • Fabrication of copper selenide (Cu2 Se) thin films via a scalable spin coating process with a soluble precursor.
Keywords:
copper selenideflexiblesolution processthermoelectricthin film

Related Experiment Videos

  • Characterization of thermoelectric properties, including power factor, on both rigid and flexible substrates.
  • Assessment of device performance and stability through bending tests.

    • Main Results:

    • Achieved a high power factor of 0.62 mW/(m K2) at 684 K on Al2 O3 and 0.46 mW/(m K2) at 664 K on polyimide.
    • Demonstrated significantly higher performance compared to other solution-processed Cu2 Se films and competitive values among flexible thermoelectric films.
    • Exhibited negligible performance degradation after 1000 bending cycles, indicating excellent mechanical robustness.

    Conclusions:

    • A low-cost, scalable method for producing high-performance flexible thermoelectric thin films from earth-abundant elements has been established.
    • The developed Cu2 Se thin film shows great potential for integration into flexible electronic devices as a sustainable power source.
    • This work paves the way for advanced flexible thermoelectric energy harvesters and other solid-state devices.