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Issue 10, 2013

Solution processed zinc oxide nanopyramid/silver nanowire transparent network films with highly tunable light scattering properties

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Abstract

Metal nanowire transparent networks are promising replacements to indium tin oxide (ITO) transparent electrodes for optoelectronic devices. While the transparency and sheet resistance are key metrics for transparent electrode performance, independent control of the film light scattering properties is important to developing multifunctional electrodes for improved photovoltaic absorption. Here we show that controlled incorporation of ZnO nanopyramids into a metal nanowire network film affords independent, highly tunable control of the scattering properties (haze) with minimal effects on the transparency and sheet resistance. Varying the zinc oxide/silver nanostructure ratios prior to spray deposition results in sheet resistances, transmission (600 nm), and haze (600 nm) of 6–30 Ω □−1, 68–86%, and 34–66%, respectively. Incorporation of zinc oxide nanopyramid scattering agents into the conducting nanowire mesh has a negligible effect on mesh connectivity, providing a straightforward method of controlling electrode scattering properties. The decoupling of the film scattering power and electrical characteristics makes these films promising candidates for highly scattering transparent electrodes in optoelectronic devices and can be generalized to other metal nanowire films as well as carbon nanotube transparent electrodes.

Graphical abstract: Solution processed zinc oxide nanopyramid/silver nanowire transparent network films with highly tunable light scattering properties

Article information


Submitted
19 Feb 2013
Accepted
29 Mar 2013
First published
02 Apr 2013

Nanoscale, 2013,5, 4400-4403
Article type
Paper

Solution processed zinc oxide nanopyramid/silver nanowire transparent network films with highly tunable light scattering properties

S. Mehra, M. G. Christoforo, P. Peumans and A. Salleo, Nanoscale, 2013, 5, 4400 DOI: 10.1039/C3NR00863K

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