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The industrial development of transparent conducting coatings by a Sol-Gel route

Gunner, Alec Gordon (2010)
Eng.D. thesis, University of Birmingham.

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Transparent conducting coatings are used in a wide range of applications, particularly displays and photovoltaic devices, and demand is anticipated to increase with the rise of plastic electronics. Indium tin oxide, deposited by sputter coating, is widely used. Concerns over the cost and long term availability of indium, together with environmental concerns over production, are driving a search for more efficient deposition methods and alternative materials. This work represented the early stage development of industrially applicable coatings, hence the work was performed with a supply chain partnership to facilitate commercial uptake. Sol-gel technology was used to facilitate direct printing of patterned layers. Precursors were selected and a processing route developed. Values for glass transition and crystallization temperature were found to be considerably lower than the accepted bulk value. Dip-coated parts yielded indium tin oxide coatings with transparency of 98% and resistivity of 1.5x10\(^-\)\(^2\)\(\Omega\)cm fired in nitrogen and 98% transparency, 3.0x10\(^-\)\(^2\)\(\Omega\)cm resistivity fired in air. A printed coating was produced with 93% transparency and 7.0\(\Omega\)cm resistivity. It was established that the limitations to conductivity arose from low film thickness and lack of macro-scale connectivity within the layer. Initial work was also conducted in preparing tin oxide and silicon-doped zinc oxide coatings.

Type of Work:Eng.D. thesis.
Supervisor(s):Abell, J. S.
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:Department of Metallurgy and Materials
Subjects:TN Mining engineering. Metallurgy
Institution:University of Birmingham
ID Code:993
This unpublished thesis/dissertation is copyright of the author and/or third parties.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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