Issue 32, 2017

Transparent tantalum cluster-based UV and IR blocking electrochromic devices

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

Supplementary files

Article information

Article type
Paper
Submitted
05 May 2017
Accepted
14 Jul 2017
First published
14 Jul 2017

J. Mater. Chem. C, 2017,5, 8160-8168

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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