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Transparent radiative cooling cover window for flexible and foldable electronic displays

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Listed:
  • Kang Won Lee

    (Hanyang University)

  • Jonghun Yi

    (Hanyang University)

  • Min Ku Kim

    (Hanyang University)

  • Dong Rip Kim

    (Hanyang University)

Abstract

Transparent radiative cooling holds the promise to efficiently manage thermal conditions in various electronic devices without additional energy consumption. Radiative cooling cover windows designed for foldable and flexible displays could enhance cooling capacities in the ubiquitous deployment of flexible electronics in outdoor environments. However, previous demonstrations have not met the optical, mechanical, and moisture-impermeable criteria for such cover windows. Herein, we report transparent radiative cooling metamaterials with a thickness of 50 microns as a cover window of foldable and flexible displays by rational design and synthesis of embedding optically-modulating microstructures in clear polyimide. The resulting outcome not only includes excellent light emission in the atmospheric window under the secured optical transparency but also provides enhanced mechanical and moisture-impermeable properties to surpass the demands of target applications. Our metamaterials not only substantially mitigate the temperature rise in heat-generating devices exposed to solar irradiance but also enhance the thermal management of devices in dark conditions. The light output performance of light-emitting diodes in displays on which the metamaterials are deployed is greatly enhanced by suppressing the performance deterioration associated with thermalization.

Suggested Citation

  • Kang Won Lee & Jonghun Yi & Min Ku Kim & Dong Rip Kim, 2024. "Transparent radiative cooling cover window for flexible and foldable electronic displays," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48840-x
    DOI: 10.1038/s41467-024-48840-x
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    References listed on IDEAS

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