Ageing of electrochromic WO3 coatings characterized by electrochemical impedance spectroscopy
2010 (English)In: Physica status solidi. A, Applied research, ISSN 0031-8965, E-ISSN 1521-396X, Vol. 207, no 7, 1772-1776 p.Article in journal (Refereed) Published
We have developed a method for characterization of ageing of electrochromic materials by electrochemical impedance spectroscopy (EIS). Electrochromic WO3 thin films have been electrochemically cycled in propionic acid electrolyte and probed by EIS and optical measurements. A very small amount of optical degradation was observed in both the bleached and coloured states. The samples exhibited a few hundred times higher impedance in the bleached state than in the coloured state. It was observed that, in the bleached state, impedance values at low frequencies increased significantly with increasing number of cycles.
Place, publisher, year, edition, pages
2010. Vol. 207, no 7, 1772-1776 p.
electrochromics, electrochemistry, optical properties, WO3, impedance spectroscopy
Physical Sciences Engineering and Technology
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-136517DOI: 10.1002/pssa.200983758ISI: 000280719200053OAI: oai:DiVA.org:uu-136517DiVA: diva2:377039