TY - JOUR
T1 - Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling
AU - Mandal, Jyotirmoy
AU - Fu, Yanke
AU - Overvig, Adam C.
AU - Jia, Mingxin
AU - Sun, Kerui
AU - Shi, Norman N.
AU - Zhou, Hua
AU - Xiao, Xianghui
AU - Yu, Nanfang
AU - Yang, Yuan
N1 - Publisher Copyright:
© 2017 The Authors.
PY - 2018/10/19
Y1 - 2018/10/19
N2 - Passive daytime radiative cooling (PDRC) involves spontaneously cooling a surface by reflecting sunlight and radiating heat to the cold outer space. Current PDRC designs are promising alternatives to electrical cooling but are either inefficient or have limited applicability.We present a simple, inexpensive, and scalable phase inversion-based method for fabricating hierarchically porous poly(vinylidene fluoride-co-hexafluoropropene) [P(VdF-HFP)HP] coatings with excellent PDRC capability. High, substrate-independent hemispherical solar reflectances (0.96 ± 0.03) and long-wave infrared emittances (0.97 ± 0.02) allow for subambient temperature drops of ∼6°C and cooling powers of ∼96 watts per square meter (Wm-2) under solar intensities of 890 and 750 Wm-2, respectively.The performance equals or surpasses those of state-ofthe-art PDRC designs, and the technique offers a paint-like simplicity.
AB - Passive daytime radiative cooling (PDRC) involves spontaneously cooling a surface by reflecting sunlight and radiating heat to the cold outer space. Current PDRC designs are promising alternatives to electrical cooling but are either inefficient or have limited applicability.We present a simple, inexpensive, and scalable phase inversion-based method for fabricating hierarchically porous poly(vinylidene fluoride-co-hexafluoropropene) [P(VdF-HFP)HP] coatings with excellent PDRC capability. High, substrate-independent hemispherical solar reflectances (0.96 ± 0.03) and long-wave infrared emittances (0.97 ± 0.02) allow for subambient temperature drops of ∼6°C and cooling powers of ∼96 watts per square meter (Wm-2) under solar intensities of 890 and 750 Wm-2, respectively.The performance equals or surpasses those of state-ofthe-art PDRC designs, and the technique offers a paint-like simplicity.
UR - https://www.scopus.com/pages/publications/85055188453
UR - https://www.scopus.com/pages/publications/85055188453#tab=citedBy
U2 - 10.1126/science.aat9513
DO - 10.1126/science.aat9513
M3 - Article
C2 - 30262632
AN - SCOPUS:85055188453
SN - 0036-8075
VL - 362
SP - 315
EP - 319
JO - Science
JF - Science
IS - 6412
ER -