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    Spectrally Selective Smart Window with High Near-Infrared Light Shielding and Controllable Visible Light Transmittance

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    acsami.8b15574.pdf
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    Type
    Article
    Authors
    Wu, Mengchun cc
    Shi, Yusuf
    Li, Renyuan cc
    Wang, Peng cc
    KAUST Department
    Water Desalination and Reuse Research Center (WDRC)
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Date
    2018-10-26
    Online Publication Date
    2018-10-26
    Print Publication Date
    2018-11-21
    Permanent link to this record
    http://hdl.handle.net/10754/629469
    
    Metadata
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    Abstract
    Smart windows with high near-infrared (NIR) light shielding and controllable visible light transmittance are highly sought after for cooling energy saving in buildings. Herein we present a rationally designed spectrally selective smart window which is capable of shielding 96.2% of the NIR irradiation from 800 nm to 2500 nm and at the same time permitting acceptable visible light (78.2% before and 45.3% after its optical switching) for indoor daylighting. The smart window synergistically integrates the highly selective and effective NIR absorption based photothermal conversion of cesium tungsten bronze (CsxWO3) with the transparent thermo-responsive poly(N-isopropyl acrylamide) microgel-polyacrylamide (PAM-PNIPAM) hydrogel. The optical switching of the smart window is a direct result of the phase transition of PAM-PNIPAM hydrogel which in turn is induced by the photothermal effect of CsxWO3 under sunlight irradiation. The smart window exhibits fast optical switching, shows a long-term operational stability, and can be made highly flexible. Under the experimental conditions in this work, the indoor temperature with the smart window is ~21 °C lower than that with regular single-layered glass window under one sun irradiation. The smart window design in this work is meaningful for further development of effective smart windows for energy saving in the build environment.
    Citation
    Wu M, Shi Y, Li R, Wang P (2018) Spectrally Selective Smart Window with High Near-Infrared Light Shielding and Controllable Visible Light Transmittance. ACS Applied Materials & Interfaces. Available: http://dx.doi.org/10.1021/acsami.8b15574.
    Sponsors
    This work was supported by the King Abdullah University of Science and Technology (KAUST) Center Competitive Fund (CCF) awarded to Water Desalination and Reuse Center (WDRC).
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.8b15574
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsami.8b15574
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.8b15574
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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