Recent Advances in Fluorescence-Based Colored Passive Daytime Radiative Cooling for Heat Mitigation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10489178" target="_blank" >RIV/00216208:11320/24:10489178 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=7IOqr22HV6" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=7IOqr22HV6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10765-024-03382-8" target="_blank" >10.1007/s10765-024-03382-8</a>
Alternative languages
Result language
angličtina
Original language name
Recent Advances in Fluorescence-Based Colored Passive Daytime Radiative Cooling for Heat Mitigation
Original language description
Passive daytime radiative coolers (PDRCs) with exceptionally high solar reflectance and emissivity in the atmospheric window can provide sub-ambient cooling while reducing buildings' cooling energy demand. However, glare and esthetic issues limit their application to high-rise buildings while may increase the building's heating energy needs. Passive colored radiative coolers (PCRCs), based on fluorescent materials, convert part of the absorbed UV and visible solar radiation into emitted light, providing color and reducing the thermal balance of the materials and the potential visual annoyance. This article investigates the state of the art on the PCRC based on fluorescent technologies. Seven articles presenting different combinations of PDRC technologies with fluorescent components to create PCRCs of various colors are presented and analyzed in detail. Quantum dots and phosphors embedded in polymer matrices and combined with reflecting and emitting layers were used as the fluorescent layer of the seven developed green, red, yellow, and yellow-green films. The proposed PCRCs are characterized by very significant differences in cooling performance, although most presented sub-ambient surface temperatures. Their cooling potential is comparatively investigated in terms of the testing climatic conditions and their optical characteristics. The potential increase of their surface temperature, caused by the addition of the fluorescent component, is analyzed through comparisons between the proposed PCRCs and the corresponding white PDRCs without the fluorescent component. The average temperature difference of the green, red, yellow, and yellow-green films against the reference PDRCs is found to be 0.66 degrees C, 2.6 degrees C, 1.7 degrees C and 1.4 degrees C, respectively. A relevant decreasing trend, but not statistically significant, is observed between the temperature increase caused by the fluorescent additives and the corresponding photoluminescence quantum yield.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/GA23-06644S" target="_blank" >GA23-06644S: Fluorescent radiative-cooling materials: development, testing and applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Thermophysics
ISSN
0195-928X
e-ISSN
1572-9567
Volume of the periodical
45
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
22
Pages from-to
90
UT code for WoS article
001234486300003
EID of the result in the Scopus database
2-s2.0-85194863523