DC Field | Value | Language |
---|---|---|
dc.contributor.author | So, Sunae | - |
dc.contributor.author | Yang, Younghwan | - |
dc.contributor.author | Son, Soomin | - |
dc.contributor.author | Lee, Dasol | - |
dc.contributor.author | Chae, Dongwoo | - |
dc.contributor.author | Lee, Heon | - |
dc.contributor.author | Rho, Junsuk | - |
dc.date.accessioned | 2022-06-21T11:40:38Z | - |
dc.date.available | 2022-06-21T11:40:38Z | - |
dc.date.created | 2022-01-07 | - |
dc.date.issued | 2022-05 | - |
dc.identifier.issn | 2192-8614 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/112930 | - |
dc.description.abstract | © 2021 Sunae So et al., published by De Gruyter, Berlin/Boston 2021.Here, we report a selective multilayer emitter for eco-friendly daytime passive radiative cooling. The types of materials and thickness of up to 10 layers of the multilayer structure are optimized by a genetic algorithm. The passive radiative cooler is designed to mainly target low solar absorption, which allows sub-ambient cooling under direct sunlight. We used a custom objective function in the solar region to achieve high-performance daytime radiative cooling to minimize solar absorption. The designed structure minimizes solar absorption with an average absorptivity of 5.0% in the solar region (0.3-2.5 μm) while strongly emitting thermal radiation with an average emissivity of 86.0% in the atmospheric transparency window (8-13 μm). The designed and fabricated structure achieves daytime net cooling flux of 84.8 W m-2 and 70.6 W m-2, respectively, under the direct AM 1.5 solar irradiation (SI) (total heat flux of 892 W m-2 in the 0.3-2.5 μm wavelength region). Finally, we experimentally demonstrate a passive radiative cooling of the fabricated selective emitter through a 72-hour day-night cycle, showing an average and maximum temperature reduction of 3.1 °C and 6.0 °C, respectively. Our approach provides additional degrees of freedom by designing both materials and thickness and thereby is expected to allow high-performance daytime radiative cooling. | - |
dc.language | English | - |
dc.publisher | De Gruyter Open Ltd | - |
dc.relation.isPartOf | Nanophotonics | - |
dc.title | Highly suppressed solar absorption in a daytime radiative cooler designed by genetic algorithm | - |
dc.type | Article | - |
dc.identifier.doi | 10.1515/nanoph-2021-0436 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Nanophotonics, v.11, no.9, pp.2107 - 2115 | - |
dc.identifier.wosid | 000739873500001 | - |
dc.citation.endPage | 2115 | - |
dc.citation.number | 9 | - |
dc.citation.startPage | 2107 | - |
dc.citation.title | Nanophotonics | - |
dc.citation.volume | 11 | - |
dc.contributor.affiliatedAuthor | So, Sunae | - |
dc.contributor.affiliatedAuthor | Yang, Younghwan | - |
dc.contributor.affiliatedAuthor | Lee, Dasol | - |
dc.contributor.affiliatedAuthor | Rho, Junsuk | - |
dc.identifier.scopusid | 2-s2.0-85119423362 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | Y | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | EMITTER | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordAuthor | computational optimization | - |
dc.subject.keywordAuthor | multilayer structures | - |
dc.subject.keywordAuthor | radiative cooling | - |
dc.subject.keywordAuthor | selective emitters | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Optics | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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