On the combination of quantum dots with near-infrared reflective base coats to maximize their urban overheating mitigation potential
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10420710" target="_blank" >RIV/00216208:11320/20:10420710 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BzE3C4mjQo" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BzE3C4mjQo</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.solener.2020.09.069" target="_blank" >10.1016/j.solener.2020.09.069</a>
Alternative languages
Result language
angličtina
Original language name
On the combination of quantum dots with near-infrared reflective base coats to maximize their urban overheating mitigation potential
Original language description
Application of highly absorptive construction materials is proved to be one of leading causes of urban overheating in big cities. To avoid the excessive heat by the conventional construction materials, several advanced heat-rejecting coating technologies were developed during the last decades. The main idea behind heat-rejecting coatings is to have colder coatings with the same appearance and colour of conventional coatings. One of the existing technologies for heat-rejecting coatings are advanced coatings with high solar reflection in the infrared range or so-called cool coatings. Recently, re-emission of the visible-range light by nano-scale semiconductors, known as Quantum Dots (QDs), were introduced as another effective heat-rejecting technology. In this paper, we showed that QDs also demonstrate a very high solar transmission in the near-infrared range, and therefore, highly near-infrared reflective base layer can significantly improve their cooling potential. The high transmission value in the near-infrared range is due to the low absorption coefficient in the wavelengths longer than absorption edge wavelength (i.e. the wavelength corresponding to the bandgap energy) in semiconductors. We show that surface temperature reduction potential of CdSe/ZnS QDs film through fluorescent cooling is about 2.5 degrees C, which could be increased by another 8.1 degrees C with a highly near-infrared reflective base layer in a typical sunny day.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Solar Energy
ISSN
0038-092X
e-ISSN
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Volume of the periodical
211
Issue of the periodical within the volume
NOV 15 2020
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
111-116
UT code for WoS article
000593745900005
EID of the result in the Scopus database
2-s2.0-85091655122