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Issue 32, 2017
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Transparent tantalum cluster-based UV and IR blocking electrochromic devices

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Abstract

The integration by a solution deposition process of tantalum octahedral clusters in multifunctional nanocomposite materials and devices for smart windows is investigated for the first time in this study. Two [Ta6Bri12]n+ cluster core-based highly transparent visible UV and NIR filters are realized. Films are fabricated by incorporation of clusters in a polymer matrix and coating them on an ITO substrate. The electrochromic cell consists of a Ta6-based electrolyte inserted between two transparent conductive electrodes. In both cases, the modification of the absorption properties in the visible and NIR spectral range is possible by altering and controlling the oxidation state of the tantalum cluster. The stabilization of reduced [Ta6Bri12]2+ or oxidized [Ta6Bri12]3+/4+ species leads to green-emerald or slight brown filters having a slight or a strong red-NIR absorption respectively. Their efficiency in energy saving is estimated by the determination of figures of merit and color coordinates. This highlights that [Ta6Bri12]n+-based composites are promising absorbers for energy saving applications.

Graphical abstract: Transparent tantalum cluster-based UV and IR blocking electrochromic devices

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Publication details

The article was received on 05 May 2017, accepted on 14 Jul 2017 and first published on 14 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC01964E
Citation: J. Mater. Chem. C, 2017,5, 8160-8168
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    Transparent tantalum cluster-based UV and IR blocking electrochromic devices

    A. Renaud, M. Wilmet, T. G. Truong, M. Seze, P. Lemoine, N. Dumait, W. Chen, N. Saito, T. Ohsawa, T. Uchikoshi, N. Ohashi, S. Cordier and F. Grasset, J. Mater. Chem. C, 2017, 5, 8160
    DOI: 10.1039/C7TC01964E

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