Insulator-conductor type transitions in graphene-modified silver nanowire networks: a route to inexpensive transparent conductors

Jurewicz, Izabela, Fahimi, Azin, Lyons, Phillip E, Smith, Ronan J, Cann, Maria, Large, Matthew L, Tian, Mingwen, Coleman, Jonathan N and Dalton, Alan B (2014) Insulator-conductor type transitions in graphene-modified silver nanowire networks: a route to inexpensive transparent conductors. Advanced Functional Materials, 24 (48). pp. 7580-7587. ISSN 1616-301X

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Abstract

Silver nanowire coatings are an attractive alternative to indium tin oxide for producing transparent conductors. To fabricate coatings with low sheet resistance required for touchscreen displays, a multi-layer network of silver nanowires must be produced that may not be cost effective. This problem is counteracted here by modifying the electrical properties of an ultra low-density nanowire network through local deposition of conducting graphene platelets. Unlike other solution-processed materials, such as graphene oxide, our pristine graphene is free of oxygen functional groups, resulting in it being electrically conducting without the need for further chemical treatment. Graphene adsorption at interwire junctions as well as graphene connecting adjacent wires contributes to a marked enhancement in electrical properties. Using our approach, the amount of nanowires needed to produce viable transparent electrodes could be more than 50 times less than the equivalent pristine high density nanowire networks, thus having major commercial implications. Using a laser ablation process, it is shown that the resulting fi lms can be patterned into individual electrode structures, which is a pre-requisite to touchscreen sensor fabrication.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Materials Physics Group
Subjects: Q Science
Depositing User: Alan Dalton
Date Deposited: 19 Jan 2018 12:26
Last Modified: 19 Jan 2018 12:26
URI: http://sro.sussex.ac.uk/id/eprint/72984

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