Passive radiative cooling below ambient air temperature under direct sunlight

Aaswath P. Raman (), Marc Abou Anoma, Linxiao Zhu, Eden Rephaeli and Shanhui Fan ()
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Aaswath P. Raman: Ginzton Laboratory, Stanford University
Marc Abou Anoma: Stanford University
Linxiao Zhu: Stanford University
Eden Rephaeli: Ginzton Laboratory, Stanford University
Shanhui Fan: Ginzton Laboratory, Stanford University

Nature, 2014, vol. 515, issue 7528, 540-544

Abstract: A multilayer photonic structure is described that strongly reflects incident sunlight while emitting heat selectively through an atmospheric transparency window to outer space; this leads to passive cooling under direct sunlight of 5 degrees Celsius below ambient air temperature, which has potential applications in air-conditioning and energy efficiency.

Date: 2014
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DOI: 10.1038/nature13883

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