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Ageing of electrochromic WO3 coatings characterized by electrochemical impedance spectroscopy
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 opt...
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Published in: | Physica status solidi. A, Applications and materials science Applications and materials science, 2010-07, Vol.207 (7), p.1772-1776 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | 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. |
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ISSN: | 1862-6300 1521-396X 0031-8965 1862-6319 |
DOI: | 10.1002/pssa.200983758 |