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Improved Flexible Transparent Conductive Electrodes based on Silver Nanowire Networks by a Simple Sunlight Illumination Approach
KTH, School of Electrical Engineering (EES).ORCID iD: 0000-0002-3401-1125
2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, 42052Article in journal (Refereed) Published
Abstract [en]

Silver nanowire (Ag NW) networks have attracted wide attention as transparent electrodes for emerging flexible optoelectronics. However, the sheet resistance is greatly limited by large wire-to-wire contact resistances. Here, we propose a simple sunlight illumination approach to remarkably improve their electrical conductivity without any significant degradation of the light transmittance. Because the power density is extremely low (0.1 W/cm(2), 1-Sun), only slight welding between Ag NWs has been observed. Despite this, a sheet resistance of <20 Omega/sq and transmittance of similar to 87% at wavelength of 550 nm as well as excellent mechanical flexibility have still been achieved for Ag NW networks after sunlight illumination for 1 hour or longer, which are significant upgrades over those of ITO. Slight plasmonic welding together with the associated self-limiting effect has been investigated by numerical simulations and further verified experimentally through varied solar concentrations. Due to the reduced resistance, high-performance transparent film heaters as well as efficient defrosters have been demonstrated, which are superior to the previously-reported Ag NW based film heaters. Since the sunlight is environmentally friendly and easily available, sophisticated or expensive facilities are not necessary. Our findings are particularly meaningful and show enormous potential for outdoor applications.

Place, publisher, year, edition, pages
Nature Publishing Group, 2017. Vol. 7, 42052
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-202641DOI: 10.1038/srep42052ISI: 000393512000001PubMedID: 28169343ScopusID: 2-s2.0-85011840613OAI: oai:DiVA.org:kth-202641DiVA: diva2:1078987
Note

QC 20170307

Available from: 2017-03-07 Created: 2017-03-07 Last updated: 2017-03-07Bibliographically approved

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