Bio-Inspired Ordered WO₃ Nano-Helixes Enable Multi-Band Electrochromic Smart Windows with Ultrafast Switching and Robust CyclabilityOA
Multi-band electrochromic(MBEC)smart windows,capable of dynamic and selective management of solar radiation(visible and near-infrared transmittance)and thermal radiation(mid-and long-wave infrared emissivity),are crucial for zero-energy buildings and adaptive optical systems.However,they have not yet been developed due to the inherent material design challenges and kinetics-stability trade-offs.Inspired by lotus root vessels,we develop vertically aligned nano-helix tungsten oxide(NH-WO₃)films with amorphous-crystalline heterophase.The multiscale microstructure provides numerous active sites,enhances local electric fields,and alleviates stress during repeated cycling.Consequently,NH-WO₃achieves unprecedented quad-band electrochromic performances with multi-mode photothermal modulation across the visible to long-wave infrared spectra,featuring large optical contrast(ΔT_(VIS-NIR)≈79%),significant temperature and emissivity variation(ΔT=9.3℃,Δε=0.47@5µm),ultrafast switching(3.9/1.9 s@780 nm,2.8/2.5 s@990 nm),and robust cyclability(10000 cycles with only 9.1%optical-contrast loss).Furthermore,a prototype smart window based on the NH-WO₃film maintains a comfortable indoor temperature of 26℃ even under continuous AM1.5G solar irradiation for 1 hour.This bio-inspired nano-helix design provides an efficient strategy for the development of advanced next-generation photothermal management smart windows toward practical energy-efficient architectures and adaptive optics.
Pan Li;Ying Lv;Xin You;Hangyu Ma;Tienan Wang;Yue Shen;Xiaotian Li;Xiaoyang Guo;Guofa Cai;Xingyuan Liu
State Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China University of Chinese Academy of Sciences,Beijing 100049,ChinaState Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,ChinaState Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China University of Chinese Academy of Sciences,Beijing 100049,ChinaState Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,ChinaState Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,ChinaState Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China University of Chinese Academy of Sciences,Beijing 100049,ChinaGrating Technique Research Center,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,ChinaState Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,ChinaKey Laboratory for Special Functional Materials of Ministry of Education,National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology,and School of Nanoscience and Materials Engineering,Henan University,Kaifeng 475004,ChinaState Key Laboratory of Luminescence Science and Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China
建筑与水利
dynamic solar and thermal managementhigh stabilitynano-helix tungsten oxidequad-band electrochromismultrafast response
《Energy & Environmental Materials》 2026 (3)
P.505-514,10
supported by the National Natural Science Foundation of China(Nos.62475256,62035013,61275235)the Jilin Provincial Scientific and Technological Development Program(20230508109RC,20230201051GX).
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