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Sub-ambient daytime radiative cooling by silica-coated porous anodic aluminum oxide SCIE SCOPUS

Title
Sub-ambient daytime radiative cooling by silica-coated porous anodic aluminum oxide
Authors
Lee, D.Go, M.Son, S.Kim, M.Badloe, T.Lee, H.Kim, J.K.Rho, J.
Date Issued
2021-01
Publisher
ELSEVIER
Abstract
An energy-free daytime radiative cooler based on silica-coated porous anodic aluminum oxide is proposed, optimized, and experimentally realized. It is shown that a simple thin silica layer coating on porous anodic aluminum oxide can produce the spectral emissivity in the atmospheric window (8-13 mu m) required for subambient cooling effect under direct sunlight. The final design, optimized using effective medium theory, exhibits high reflectance of 0.86 in the solar spectral region, and a substantial average emissivity of 0.96 in the atmospheric window. The fabricated centimeter-scale radiative cooler demonstrates a maximum cooling of 6.1 degrees C below ambient during the daytime. We believe that the proposed approach is a promising way to produce inexpensive and efficient radiative coolers.
URI
https://oasis.postech.ac.kr/handle/2014.oak/105359
DOI
10.1016/j.nanoen.2020.105426
ISSN
2211-2855
Article Type
Article
Citation
NANO ENERGY, vol. 79, 2021-01
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김진곤KIM, JIN KON
Dept. of Chemical Enginrg
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