TY - JOUR
T1 - Colored emitters with silica-embedded perovskite nanocrystals for efficient daytime radiative cooling
AU - Son, Soomin
AU - Jeon, Sanghyun
AU - Chae, Dongwoo
AU - Lee, Sang Yeop
AU - Liu, Yuting
AU - Lim, Hangyu
AU - Oh, Soong Ju
AU - Lee, Heon
N1 - Funding Information:
This research was supported by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT, South Korea ( NRF-2018M3D1A1058972 , 2020R1A2C3006382 ), and by the International Research & Development Program of the NRF funded by the Ministry of Science and ICT, South Korea (Grant number: 2019K1A47A02113032 ).
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - Daytime radiative cooling is an innovative way to counter the temperature increase caused by solar exposure inside buildings, cars, and industries without consuming energy. To improve the radiative cooling performance, the light-to-heat energy conversion through solar reflection should be minimized, while the heat radiation in the wavelength range of 8–13 µm (atmospheric window) should be maximized. In this work, colored emitters for daytime radiative cooling are fabricated with silica-embedded perovskite nanocrystals, which can be colored with high light-to-photon conversion in the solar spectrum instead of light-to-heat conversion, and coated onto a highly mid-IR-radiative white emitter. The fabricated white, green, and red emitters for daytime radiative cooling exhibit sub-ambient cooling temperatures of 4.2, 3.6, and 1.7 °C, respectively, in outdoor measurements. Additionally, the enhancement of the daytime cooling performance by the light-photon conversion is proven through the comparison experiments and numerical calculation. These colored emitters for radiative cooling are more aesthetically pleasing than conventional white- and metallic-colored surface emitters, and are expected to diversify the applications for daytime radiative cooling.
AB - Daytime radiative cooling is an innovative way to counter the temperature increase caused by solar exposure inside buildings, cars, and industries without consuming energy. To improve the radiative cooling performance, the light-to-heat energy conversion through solar reflection should be minimized, while the heat radiation in the wavelength range of 8–13 µm (atmospheric window) should be maximized. In this work, colored emitters for daytime radiative cooling are fabricated with silica-embedded perovskite nanocrystals, which can be colored with high light-to-photon conversion in the solar spectrum instead of light-to-heat conversion, and coated onto a highly mid-IR-radiative white emitter. The fabricated white, green, and red emitters for daytime radiative cooling exhibit sub-ambient cooling temperatures of 4.2, 3.6, and 1.7 °C, respectively, in outdoor measurements. Additionally, the enhancement of the daytime cooling performance by the light-photon conversion is proven through the comparison experiments and numerical calculation. These colored emitters for radiative cooling are more aesthetically pleasing than conventional white- and metallic-colored surface emitters, and are expected to diversify the applications for daytime radiative cooling.
KW - Broadband mid-IR emitter
KW - Colored emitter
KW - Daytime radiative cooling
KW - High photoluminescence quantum yields
KW - Perovskite nanocrystal
UR - http://www.scopus.com/inward/record.url?scp=85094957562&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2020.105461
DO - 10.1016/j.nanoen.2020.105461
M3 - Article
AN - SCOPUS:85094957562
SN - 2211-2855
VL - 79
JO - Nano Energy
JF - Nano Energy
M1 - 105461
ER -
