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Cited 11 time in webofscience Cited 15 time in scopus
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Sub-ambient daytime radiative cooling by silica-coated porous anodic aluminum oxide

Authors
Lee, DasolGo, MyeongcheolSon, SoominKim, MinkyungBadloe, TrevonLee, HeonKim, Jin KonRho, Junsuk
Issue Date
1월-2021
Publisher
ELSEVIER
Keywords
Anodic aluminum oxide; Atomic layer deposition; Selective emitter; Passive; Radiative cooling; Daytime
Citation
NANO ENERGY, v.79
Indexed
SCIE
SCOPUS
Journal Title
NANO ENERGY
Volume
79
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50647
DOI
10.1016/j.nanoen.2020.105426
ISSN
2211-2855
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.
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공과대학 (신소재공학부)
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