Electrospun Metal Nanofiber Webs as High-Performance Transparent Electrode

Transparent electrodes, indespensible in displays and solar cells, are currently dominated by indium tin oxide (ITO) films although the high price of indium, brittleness of films, and high vacuum deposition are limiting their applications. Recently, solution-processed networks of nanostructures such as carbon nanotubes (CNTs), graphene, and silver nanowires have attracted great attention as replacements. A low junction resistance between nanostructures is important for decreasing the sheet resistance. However, the junction resistances between CNTs and boundry resistances between graphene nanostructures are too high. The aspect ratios of silver nanowires are limited to ∼100, and silver is relatively expensive. Here, we show high-performance transparent electrodes with copper nanofiber networks by a low-cost and scalable electrospinning process. Copper nanofibers have ultrahigh aspect ratios of up to 100000 and fused crossing points with ultralow junction resistances, which result in high transmitance at low sheet resistance, e.g., 90% at 50 Ω/sq. The copper nanofiber networks also show great flexibility and stretchabilty. Organic solar cells using copper nanowire networks as transparent electrodes have a power efficiency of 3.0%, comparable to devices made with ITO electrodes. © 2010 American Chemical Society.

Wu H, Hu L, Rowell MW, Kong D, Cha JJ, et al. (2010) Electrospun Metal Nanofiber Webs as High-Performance Transparent Electrode. Nano Lett 10: 4242–4248. Available: http://dx.doi.org/10.1021/nl102725k.

Y C acknowledges support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No KUS-II-001-12), US Department of Energy. and Stanford Global Climate Energy Projects J M acknowledges support from the National Science Foundation and National Defense Science and Engineering graduate research fellowships

American Chemical Society (ACS)

Nano Letters


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