Active and Passive Electronic Components

Active and Passive Electronic Components / 1998 / Article

Open Access

Volume 20 |Article ID 043025 |

N. G. Park, B. W. Kim, A. Poquet, G. Campet, J. Portier, J. H. Choy, Y. I. Kim, "A New and Simple Method for Manufacturing Electrochromic Tungsten Oxide Films", Active and Passive Electronic Components, vol. 20, Article ID 043025, 9 pages, 1998.

A New and Simple Method for Manufacturing Electrochromic Tungsten Oxide Films

Received27 Jun 1997
Accepted22 Jul 1997


A new and simple method for the preparation of electrochromic tungsten oxide film is presented. This novel approach can be realized by introducing a nanoporous textured polyacrylic acid (PAA) layer between tungsten oxide layer and indium tin oxide (ITO) one by dip-coating process. Homogeneous film with a thickness of about 0.8 μm is made by single dipping a PAA-coated ITO glass in the WO3-NH4OH solution and shows an X-ray amorphous structure. During the cathodic and anodic processes by chronopotentiometry, the present films exhibit highly reversible electrochemical insertion of lithium ions; the corresponding inserted charge of 12.5 mC/cm2 gives rise to a marked blue color yielding the change in optical density (AOD) of 0.65 at 550 nm and a coloration efficiency (η) of 51.8 cm2/C.

Copyright © 1998 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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