Highly Transparent Au-Coated Ag Nanowire Transparent Electrode with Reduction in Haze

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Ag nanowire transparent electrode has excellent transmittance and sheet resistance, yet its optical haze still needs to be improved in order for it to be suitable for display applications. Ag nanowires are known to have high haze because of the geometry of the nanowire and the high light scattering characteristic of the Ag. In this study, a Au-coated Ag nanowire structure was proposed to reduce the haze, where a thin layer of Au was coated on the surface of the Ag nanowires using a mild [Au(en)(2)]Cl-3 galvanic displacement reaction. The mild galvanic exchange allowed for a thin layer of Au coating on the Ag nanowires with minimal truncation of the nanowire, where the average length and the diameter were 13.0 mu m and 60 nm, respectively. The Au-coated Ag nanowires were suspended in methanol and then electrostatically sprayed on a flexible polycarbonate substrate that revealed a clear reduction in haze with a 2-4% increase in total transmittance, sheet resistance ranges of 80-90%, and 8.8-36.8 Ohm/sq. Finite difference time domain simulations were conducted for Au-coated Ag nanowires that indicated a significant reduction in the average scattering from 1 to 0.69 fo Au layer thicknesses of 0-10 nm.
Publisher
AMER CHEMICAL SOC
Issue Date
2014-08
Language
English
Article Type
Article
Citation

ACS Applied Materials & Interfaces, v.6, no.16, pp.13527 - 13534

ISSN
1944-8244
DOI
10.1021/am502632t
URI
http://hdl.handle.net/10203/193844
Appears in Collection
EE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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