A Self-Assembled 2D Thermofunctional Material for Radiative Cooling.
radiative cooling
self-assembled single-layer crystals
silica
thermofunctional materials
ultra-broadband thermal emitters
Journal
Small (Weinheim an der Bergstrasse, Germany)
ISSN: 1613-6829
Titre abrégé: Small
Pays: Germany
ID NLM: 101235338
Informations de publication
Date de publication:
Dec 2019
Dec 2019
Historique:
received:
16
09
2019
pubmed:
28
10
2019
medline:
28
10
2019
entrez:
26
10
2019
Statut:
ppublish
Résumé
The regulation of temperature is a major energy-consuming process of humankind. Today, around 15% of the global-energy consumption is dedicated to refrigeration and this figure is predicted to triple by 2050, thus linking global warming and cooling needs in a worrying negative feedback-loop. Here, an inexpensive solution is proposed to this challenge based on a single layer of silica microspheres self-assembled on a soda-lime glass. This 2D crystal acts as a visibly translucent thermal-blackbody for above-ambient radiative cooling and can be used to improve the thermal performance of devices that undergo critical heating during operation. The temperature of a silicon wafer is found to be 14 K lower during daytime when covered with the thermal emitter, reaching an average temperature difference of 19 K when the structure is backed with a silver layer. In comparison, the soda-lime glass reference used in the measurements lowers the temperature of the silicon by just 5 K. The cooling power of this simple radiative cooler under direct sunlight is found to be 350 W m
Identifiants
pubmed: 31650687
doi: 10.1002/smll.201905290
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e1905290Subventions
Organisme : The European Union's Horizon 2020 research and innovation program
ID : 665919
Organisme : Spanish Minister of Science, Innovation and Universities
ID : SEV-2017-0706
Organisme : Spanish Minister of Science, Innovation and Universities
ID : RTI2018-093921-B-C41
Organisme : Spanish Minister of Science, Innovation and Universities
ID : RTI2018-093921-A-C44
Organisme : Ramon y Cajal fellowship
ID : RyC-2015-18124
Informations de copyright
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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