Electrochromic materials for smart windows

Contact: Dr Andreas Schüler, Olivia Bouvard

This activity is centred on the development of next generation electrochromic switchable glazing technologies. Even though “smart windows” based on electrochromic coatings are on the market today, there are still several major drawbacks with existing technologies. The switching speed is slow; the optical response of switching has to be improved with respect to contrast and speed. In addition, the durability of devices based on liquid or organic electrolytes is not yet satisfying, which requires the development of systems with increased cycling stability. Innovative approaches for switchable optical coatings, such as novel nanocomposite electrochromic transition metal oxide layers combined with new solid ion conductors and chiral liquid crystals, open new perspectives for more durable smart glazing with faster optical response. The objectives currently pursued within this project are the development of novel nanostructured materials for switchable windows, their characterization and the prediction of their performances.

Image source: http://sageglass.com/

This project is carried out in cooperation with the Federal Commission of Technology and Innovation in the framework of WP1 of the Swiss Competence Center for Energy Research “Future energy efficient buildings and districts”.

Publications:

O. Bouvard, A. Krammer and A. Schueler. In situ core-level and valence-band photoelectron spectroscopy of reactively sputtered tungsten oxide films, in Surface and Interface Analysis, vol. 48, num. 1, 2016.