High performance {Nb5TaX12}@PVP (X = Cl, Br) cluster-based nanocomposites coatings for solar glazing applications

Clément Lebastard (1, 2, 3) , Maxence Wilmet (1, 2, 3, 4) , Stéphane Cordier (1) , Clothilde Comby-Zerbino (5, 6) , Luke Macaleese (6) , Philippe Dugourd (6) , Naoki Ohashi (2, 3) , Tetsuo Uchikoshi (2, 3) , Fabien Grasset (1, 2, 3)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 NIMS - National Institute for Materials Science
3 LINK - Laboratory for Innovative Key Materials and Structures
4 SGR - Saint-Gobain Recherche
5 UCBL - Université Claude Bernard Lyon 1
6 ILM - Institut Lumière Matière [Villeurbanne]

The development of highly ultraviolet (UV) and near-infrared (NIR) absorbent transparent coatings is an important enabling technology and area of research for environmental sustainability and energy conservation. Different amounts of K-4[{Nb5TaXi (12)}X-a (6)] cluster compounds (X = Cl, Br) dispersed into polyvinylpyrrolidone matrices were prepared by a simple, nontoxic and low-cost wet chemical method. The resulting solutions were used to fabricate visibly transparent, highly UV and NIR absorbehniques (op by drop casting. The properties of the solution and films were investigated by complementary techniques (optical absorption, electrospray ionization mass spectrometry and Raman spectroscopy). The UV and NIR absorption of such samples strongly depended on the concentration, dispersion and oxidation state of the [{Nb5TaXi (12)}X-a (6)] nanocluster-based units. By varying and controlling these parameters, a remarkable improvement of the figures of merit T-L/T-E and S-NIR for solar-glazing applications was achieved compared to the previous results on nanocomposite coatings based on metal atom clusters.

Mots clés: thin films; nanocomposites; NIR blocker; solar glazing; nanoarchitectonic; Octahedral metal clusters

Domaines: Chimie

Clément Lebastard, Maxence Wilmet, Stéphane Cordier, Clothilde Comby-Zerbino, Luke Macaleese, et al.. High performance {Nb5TaX12}@PVP (X = Cl, Br) cluster-based nanocomposites coatings for solar glazing applications. Science and Technology of Advanced Materials, 2022, 23 (1), pp.446-456. ⟨10.1080/14686996.2022.2105659⟩. ⟨hal-03797238⟩