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Effects of acrylic acid on ITO coated polymer substrates for flexible displays

Compton, David (2012)
M.Res. thesis, University of Birmingham.

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Flexible, transparent and conductive layers are required for the production of flexible touchscreen displays. Indium tin oxide deposited on a PET or PEN substrate has been identified as a potential candidate for this application, but one barrier to its successful deployment is the deterioration of its conductive properties when exposed to acid and the simultaneous application of strain. Samples were produced with varying substrate temperatures at deposition and immersed in varying concentrations of acrylic acid, before resistance was measured during the application of strain. Samples were also characterized by
scanning electron microscopy, transmission electron microscopy, X-ray diffraction, atomic force microscopy and nanoscratching. PET samples cracked prior to the application of any strain due to a high thermal mismatch, whilst PEN samples remained intact and were therefore used for the majority of experimentation. All samples were found to be crystalline in nature, with a higher grain size present in those deposited at a higher temperature. The effect of increased thermal mismatch between substrate and ITO was caused a higher sensitivity to increasing acid concentration in samples deposited at a higher temperature. Cracks due to cohesive failure formed first and dominated the initial stages of sample failure, with cracks from adhesive failure forming later.

Type of Work:M.Res. thesis.
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Metallurgy and Materials
Subjects:TN Mining engineering. Metallurgy
Institution:University of Birmingham
ID Code:3290
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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