Upscaling of aligned silver nanowires for large scale transparent electrode

Nanomaterials have great potential for use as electrodes for electronic devices. Among the many nanomaterials available, silver nanowires (AgNWs) are investigated due to their excellent thermal, electrical and optical properties, as well as the ease of synthesis. Currently, methods of deposition of...

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Main Author: Yeo, Yu Chen
Other Authors: Long Yi
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2022
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Online Access:https://hdl.handle.net/10356/156326
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spelling sg-ntu-dr.10356-1563262023-03-04T20:17:00Z Upscaling of aligned silver nanowires for large scale transparent electrode Yeo, Yu Chen Long Yi School of Materials Science and Engineering LongYi@ntu.edu.sg Engineering::Materials Nanomaterials have great potential for use as electrodes for electronic devices. Among the many nanomaterials available, silver nanowires (AgNWs) are investigated due to their excellent thermal, electrical and optical properties, as well as the ease of synthesis. Currently, methods of deposition of AgNWs onto substrate surfaces such as drop coating and filtration have resulted in the random orientation of AgNWs. This leads to an increase in sheet resistivity which is undesired. Hence, a stirring assisted assembly was employed to obtain a well-aligned deposition of AgNWs. In this study, the upscaling of this technique was investigated. The substrate used was poly(dimethylsiloxane) (PDMS) coated with a layer of poly(ethylenimine) to improve adhesion. The effect of the stirring speed was investigated and it was found that 500 rpm was the ideal speed. The adhesion effect of PEI as a binder to attract AgNWs to the PDMS surface was also proven. Cross-aligned electrodes were prepared by rotating the substrate 90 degrees and applying an additional layer of PEI and AgNWs. The sheet resistance was measured and found to have an acceptable value (≈ 5 Ω/sq). However, the transmittance had a value of ≈ 76% which was lower then the industrial standard of > 90%. The problem of uneven coating of AgNWs on the substrate surface was also noticed. Hence, the upscale technique requires more adjustments and experimentation with other techniques and materials for a better appraisal of its viability. Bachelor of Engineering (Materials Engineering) 2022-04-13T13:20:58Z 2022-04-13T13:20:58Z 2021 Final Year Project (FYP) Yeo, Y. C. (2021). Upscaling of aligned silver nanowires for large scale transparent electrode. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/156326 https://hdl.handle.net/10356/156326 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
spellingShingle Engineering::Materials
Yeo, Yu Chen
Upscaling of aligned silver nanowires for large scale transparent electrode
description Nanomaterials have great potential for use as electrodes for electronic devices. Among the many nanomaterials available, silver nanowires (AgNWs) are investigated due to their excellent thermal, electrical and optical properties, as well as the ease of synthesis. Currently, methods of deposition of AgNWs onto substrate surfaces such as drop coating and filtration have resulted in the random orientation of AgNWs. This leads to an increase in sheet resistivity which is undesired. Hence, a stirring assisted assembly was employed to obtain a well-aligned deposition of AgNWs. In this study, the upscaling of this technique was investigated. The substrate used was poly(dimethylsiloxane) (PDMS) coated with a layer of poly(ethylenimine) to improve adhesion. The effect of the stirring speed was investigated and it was found that 500 rpm was the ideal speed. The adhesion effect of PEI as a binder to attract AgNWs to the PDMS surface was also proven. Cross-aligned electrodes were prepared by rotating the substrate 90 degrees and applying an additional layer of PEI and AgNWs. The sheet resistance was measured and found to have an acceptable value (≈ 5 Ω/sq). However, the transmittance had a value of ≈ 76% which was lower then the industrial standard of > 90%. The problem of uneven coating of AgNWs on the substrate surface was also noticed. Hence, the upscale technique requires more adjustments and experimentation with other techniques and materials for a better appraisal of its viability.
author2 Long Yi
author_facet Long Yi
Yeo, Yu Chen
format Final Year Project
author Yeo, Yu Chen
author_sort Yeo, Yu Chen
title Upscaling of aligned silver nanowires for large scale transparent electrode
title_short Upscaling of aligned silver nanowires for large scale transparent electrode
title_full Upscaling of aligned silver nanowires for large scale transparent electrode
title_fullStr Upscaling of aligned silver nanowires for large scale transparent electrode
title_full_unstemmed Upscaling of aligned silver nanowires for large scale transparent electrode
title_sort upscaling of aligned silver nanowires for large scale transparent electrode
publisher Nanyang Technological University
publishDate 2022
url https://hdl.handle.net/10356/156326
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