Pyramid Textured Photonic Films with High-Refractive Index Fillers for Efficient Radiative Cooling

Fu, Yuting1; Chen, Le2; Guo, Yuao1; Shi, Yuqing2; Liu, Yanjun1; Zeng, Yuqiang2; Lin, Yuanjing2; Luo, Dan1,3,4

2024-08-01

10.1002/advs.202404900

ADVANCED SCIENCE   影响因子和分区

2198-3844

["Sub-ambient cooling technologies relying on passive radiation have garnered escalating research attention owing to the challenges posed by global warming and substantial energy consumption inherent in active cooling systems. However, achieving highly efficient radiative cooling devices capable of effective heat dissipation remains a challenge. Herein, by synergic optimization of the micro-pyramid surface structures and 2D hexagonal boron nitride nanoplates (h-BNNs) scattering fillers, pyramid textured photonic films with remarkable solar reflectivity of 98.5% and a mid-infrared (MIR) emittance of 97.2% are presented. The h-BNNs scattering filler with high thermal conductivity contributed to the enhanced through-plane thermal conductivity up to 0.496 W m-1 K-1 and the in-plane thermal conductivity of 3.175 W m-1 K-1. The photonic films exhibit an optimized effective radiative cooling power of 201.2 W m-2 at 40 degrees C under a solar irradiance of 900 W m-2 and a daily sub-ambient cooling effect up to 11 degrees C. Even with simultaneous internal heat generation by a 10 W ceramic heater and external solar irradiance of 500 W m-2, a sub-ambient cooling of 5 degrees C can be realized. The synergic matching strategy of high thermal conductivity scattering fillers and microstructured photonic surfaces holds promise for scalable sub-ambient radiative cooling technologies.","In this work, pyramid-textured photonic films with remarkable solar reflectivity and a mid-infrared emittance are presented. The films can achieve sub-ambient cooling performance up to 5 degrees C at internal heat generation and external solar irradiance. The synergic strategy of high thermal conductivity fillers and microstructured photonic ssurfacespromises to advance sub-ambient radiative cooling technologies for efficient building-scale applications. image"]

hexagonal boron nitride nanoplates micro-pyramid textured photonic films radiative cooling scattering fillers thermal conductivity

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Program of China[2022YFA1203702] ; National Natural Science Foundation of China (NSFC)["62175098","U22A20163"] ; Guangdong Basic and Applied Basic Research Foundation[2021B1515020097] ; Shenzhen Stable Support Plan Program for Higher Education Institutions Research Program["20220815153728002","20231120094333001"]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001293108500001

WILEY

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Xueyuan Rd 1088, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Sch Microelect, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, State Key Lab Opt Fiber & Cable Manufacture Techno, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Provis Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Peoples R China

Fu, Yuting,Chen, Le,Guo, Yuao,et al. Pyramid Textured Photonic Films with High-Refractive Index Fillers for Efficient Radiative Cooling[J]. ADVANCED SCIENCE,2024.

Fu, Yuting.,Chen, Le.,Guo, Yuao.,Shi, Yuqing.,Liu, Yanjun.,...&Luo, Dan.(2024).Pyramid Textured Photonic Films with High-Refractive Index Fillers for Efficient Radiative Cooling.ADVANCED SCIENCE.

Fu, Yuting,et al."Pyramid Textured Photonic Films with High-Refractive Index Fillers for Efficient Radiative Cooling".ADVANCED SCIENCE (2024).