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American Chemical Society, ACS Applied Materials and Interfaces, 16(6), p. 13527-13534, 2014

DOI: 10.1021/am502632t

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

This paper is available in a repository.
This paper is available in a repository.

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Abstract

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 due to 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]Cl3 galvanic displacement reaction. The mild galvanic exchange allowed for a thin layer of Au coating on the Ag nanowire with minimal truncation of the nanowire, where the average length and the diameter were 13.0 µm 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 4-2% 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 for Au layer thicknesses of 0 to 10 nm.