Highly efficient flexible structured metasurface by roll-to-roll printing for diurnal radiative cooling  

作　　者：Keng-Te Lin Xianbo Nian Ke Li Jihong Han Nan Zheng Xiaokang Lu Chunsheng Guo Han Lin Baohua Jia 

机构地区：[1]Centre for Atomaterials and Nanomanufacturing(CAN),School of Science,RMIT University,Melbourne,VIC 3000,Australia [2]Centre for Translational Atomaterials,Faculty of Science,Engineering and Technology,Swinburne University of Technology,P.O.Box 218,Hawthorn,VIC 3122,Australia [3]School of Mechanical,Electrical&Information Engineering,Shandong University,Weihai 264209,Shandong,China [4]Suzhou Research Institute,Shandong University,Suzhou 215123,Jiangsu,China [5]The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM),RMIT University,Melbourne,VIC 3000,Australia

出　　处：《eLight》2023年第1期45-56,共12页e光学（英文）

基　　金：the Australia Research Council through the Discovery Project scheme(Grant Nos.DP190103186,DP220100603);the support through the Industrial Transformation Training Centres scheme(Grant No.IC180100005);Future Fellowship scheme(Grant No.FT210100806);the support through the Future Fellowship scheme(Grant No.FT220100559);the support through the Discovery Early Career Researcher Award scheme(DE230100383);the Suzhou Science and Technology Plan(Grant No.SYG202118);the Natural Science Foundation of Shandong Province(Grant No.ZR2021ME162).

摘　　要：An ideal radiative cooler requires accurate spectral control capability to achieve efficient thermal emission in the atmospheric transparency window(8-13μm),low solar absorption,good stability,scalability,and a simple structure for effective diurnal radiative cooling.Flexible cooling films made from polymer relying on polymer intrinsic absorbance represent a cost-effective solution but lack accuracy in spectral control.Here,we propose and demonstrate a metasurface concept enabled by periodically arranged three-dimensional(3D)trench-like structures in a thin layer of polymer for high-performance radiative cooling.The structured polymer metasurface radiative cooler is manufactured by a roll-to-roll printing method.It exhibits superior spectral breadth and selectivity,which offers outstanding omnidirectional absorption/emission(96.1%)in the atmospheric transparency window,low solar absorption(4.8%),and high stability.Impressive cooling power of 129.8 W m^(-2) and temperature deduction of 7℃ on a clear sky midday have been achieved,promising broad practical applications in energy saving and passive heat dispersion fields.

关 键 词：Radiative cooling Metasurface Roll-to-roll printing Energy saving 

分 类 号：O433[机械工程—光学工程]