Alternative materials for flexible transparent conductive electrodes

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dc.contributor.advisor Quinn, Aidan J. en
dc.contributor.advisor Manning, Mary en
dc.contributor.advisor Burke, Micheal en
dc.contributor.author Lordan, Daniel
dc.date.accessioned 2017-04-26T11:51:49Z
dc.date.available 2017-04-26T11:51:49Z
dc.date.issued 2017
dc.date.submitted 2017
dc.identifier.citation Lordan, D. 2017. Alternative materials for flexible transparent conductive electrodes. PhD Thesis, University College Cork. en
dc.identifier.endpage 252 en
dc.identifier.uri http://hdl.handle.net/10468/3891
dc.description.abstract This thesis investigates new alternative materials for flexible transparent electrodes: monolayer graphene and micron-scale metal mesh structures. Growth of graphene on copper foils by chemical vapour deposition (CVD) was investigated by commissioning and developing a CVD system in Tyndall. Initial growth runs resulted in poor graphene coverage. Several routes for growth improvement were examined: an acid pre-treatment, substrate geometry and growth pressure. Following this improvement, a continuous growth run was carried out displaying high monolayer graphene coverage. Graphene was transferred to Si/SiO2 (90 nm thermal oxide) and glass substrates using a wet chemical transfer process. This process involves the use of a polymer which acts as a support mechanism. However, polymer residue can have drastic effects on the electrical performance of CVD graphene films. Therefore an alternative method for polymer removal with the use of heated acetone (~ 60 oC) was investigated. Micron-scale platinum mesh structures were fabricated on rigid glass substrates using a range of metal deposition techniques; metal evaporation and lift-off; ALD and dry etching and sputter deposition and dry etching. Square, hexagonal, circular and a new asymmetric pentagonal tiling were utilised as metal meshes. Their performance were investigated along with the metal deposition technique. Evaporation and lift-off provided the most consistent technique in relation to transparency, haze and sheet resistance. Finally, asymmetric pentagonal platinum meshes were fabricated on flexible transparent substrates using metal evaporation and lift-off. All designs were bent around a radius of curvature (in air) of ~ 3.8 mm up to 1,000 bending cycles for both tension and compression and suggested good performance in comparison to literature. All three designs were used as transparent heaters via Joule heating. All heaters demonstrated good thermal characteristics such as low response times and high thermal resistances. Finally, a pentagonal metal mesh was used to de-ice a glass substrate. en
dc.description.sponsorship Science Foundation Ireland (CONNECT Research Centre (13/RC/2077)); Seventh Framework Programme (GONEXTs (309201)) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2017, Daniel Lordan. en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/ en
dc.subject Metal meshes en
dc.subject Transparent electrode en
dc.subject Flexible en
dc.subject Graphene transfer en
dc.subject CVD Graphene en
dc.subject Graphene en
dc.subject Pentagon en
dc.subject Asymmetric en
dc.subject Transparent heaters en
dc.subject Polyethylene terephthalate en
dc.subject Sputtering en
dc.subject Evaporation en
dc.subject Chemical vapour deposition en
dc.subject Atomic layer deposition en
dc.title Alternative materials for flexible transparent conductive electrodes en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral Degree (Structured) en
dc.type.qualificationname PHD (Engineering) en
dc.internal.availability Full text available en
dc.check.info No embargo required en
dc.description.version Accepted Version
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Seventh Framework Programme en
dc.description.status Not peer reviewed en
dc.internal.school Tyndall National Institute en
dc.check.type No Embargo Required
dc.check.reason No embargo required en
dc.check.opt-out Not applicable en
dc.thesis.opt-out false
dc.check.embargoformat Not applicable en
ucc.workflow.supervisor aidan.quinn@tyndall.ie
dc.internal.conferring Summer 2017 en


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