Indium–tin oxide surface treatments: Effects on the performance of liquid crystal devices

In this work, we investigate the effect of indium tin oxide (ITO) substrate cleaning on the surface properties. Wettability technique was used to measure the contact angle and the surface energy of the different treated ITO substrates. It is found that treatment with the methanol without dehydration...

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Bibliographic Details
Published in:Materials Science & Engineering C 2006-03, Vol.26 (2), p.538-541
Main Authors: Abderrahmen, A., Romdhane, F.F., Ben Ouada, H., Gharbi, A.
Format: Article
Language:English
Subjects:
Impedance measurements
ITO substrate treatment
Liquid crystal cells
Surface energy
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Summary:In this work, we investigate the effect of indium tin oxide (ITO) substrate cleaning on the surface properties. Wettability technique was used to measure the contact angle and the surface energy of the different treated ITO substrates. It is found that treatment with the methanol without dehydration gives the lowest water contact angle (most hydrophilic surface) and the highest surface energy compared to other solvents. This result was confirmed by impedance measurements performed on nematic liquid crystal cells with ITO electrodes. Indeed, we check the decrease of ionic entities in the interface ITO/liquid crystal. The polarity and dielectric parameters of the used solvents explain the obtained results.
ISSN:0928-4931
1873-0191
DOI:10.1016/j.msec.2005.10.009