Berlin 2024 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 47: Poster DS (joint session DS/MM/O)
MM 47.17: Poster
Mittwoch, 20. März 2024, 17:00–19:00, Poster B
Preparation and Characterization of Mixed Electrodes of WO3 and MoO3 as Electrochromic Coatings — •Smail Mekhilef, Thi Hai Quyen Nguyen, and Derck Schlettwein — Institut für Angewandte Physik, Justus-Liebig-Universität Gießen
Electrochromic coatings can modify the transmittance for ambient light. As smart windows for buildings, relevant contributions can be expected for the energy-efficiency of buildings. Sputter- deposited WO3 is typically used. Sustainability can be increased if low-temperature processes are established that would, further, allow the use of low-impact and low-weight polymer substrates. For large-scale applications, one may want to avoid W as a critical element and, at least partly, replace it by more abundant Mo. In this study, we extended established wet-chemical methods to prepare porous thin film electrodes of WO3 [1] towards the processing of mixed oxides of W and Mo. Thin films of different W/Mo were prepared and characterized by scanning electron microscopy, atomic force microscopy and, mainly, by spectroelectrochemical measurements in contact to an inert organic electrolyte at either constant or swept electrode potential and the results will be discussed. [1]. T. H. Q. Nguyen, F. Eberheim, S. Göbel, P. Cop, M. Eckert, T. P. Schneider, L. Gümbel, B. M. Smarsly, D. Schlettwein, Enhancing the Spectroelectrochemical Performance of WO3 Films by Use of Structure-Directing Agents during Film Growth, Appl. Sci. 2022, 12, 2327.
Keywords: electrochromism; reduction; smart window