Electrical characterization of new electrochromic devices

Vergaz, Ricardo, Barrios, David, Sánchez-Pena, Jose M., Pozo-Gonzalo, Cristina and Pomposo, Jose A. 2007, Electrical characterization of new electrochromic devices, in Proceedings of the 6th Spanish Conference on Electron Devices 2007, IEEE, Piscataway, N. J., pp. 150-153, doi: 10.1109/SCED.2007.383959.

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Title Electrical characterization of new electrochromic devices
Author(s) Vergaz, Ricardo
Barrios, David
Sánchez-Pena, Jose M.
Pozo-Gonzalo, CristinaORCID iD for Pozo-Gonzalo, Cristina orcid.org/0000-0002-7890-6457
Pomposo, Jose A.
Conference name Spanish Conference on Electron Devices (6th : 2007 : Madrid, Spain)
Conference location Madrid, Spain
Conference dates 31 Jan.-2 Feb. 2007
Title of proceedings Proceedings of the 6th Spanish Conference on Electron Devices 2007
Editor(s) Algora, Carlos
Corregidor, Victoria
Rey-Stolle, Ignacio
Publication date 2007
Conference series Spanish Conference on Electron Devices
Start page 150
End page 153
Total pages 4
Publisher IEEE
Place of publication Piscataway, N. J.
Keyword(s) electrochromic devices
electro-optic characterization
impedance analysis
Summary Electrochromic devices change their color and optical properties with applied voltage. A new symmetrical electrochromic configuration was constructed in previous works, where PEDOT acted as electrochromic layer or as counter electrode layer, depending on the polarity of the applied voltage. Devices of around 500mm2 and switching voltages from 0,5V to 2V are used in this work. Measured electrochemical impedance is fitted to an equivalent circuit based on a Randles cell, with Warburg impedance simulating ionic diffusion at low frequencies. Voltage dependence is analyzed for the first time in this kind of devices. Results show homogeneity problems in the contact layers, not seen in normal operation, and the voltage dependence on some construction parameters. This will be used to improve the devices construction, but improvements in the equivalent circuit should also be made. The proposed equivalent circuit is not valid after the redox reaction, from 1.5 to 2V.
ISBN 01424408687
Language eng
DOI 10.1109/SCED.2007.383959
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category E1.1 Full written paper - refereed
Persistent URL http://hdl.handle.net/10536/DRO/DU:30050255

Document type: Conference Paper
Collections: Institute for Frontier Materials
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