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Organic solar cells with carbon nanotube network electrodes

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8 Author(s)
Rowell, Michael W. ; Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 ; Topinka, Mark A. ; McGehee, M.D. ; Prall, Hans-Jurgen
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We fabricated flexible transparent conducting electrodes by printing films of single-walled carbon nanotube (SWNT) networks on plastic and have demonstrated their use as transparent electrodes for efficient, flexible polymer-fullerene bulk-heterojunction solar cells. The printing method produces relatively smooth, homogeneous films with a transmittance of 85% at 550 nm and a sheet resistance (Rs) of 200 Ω/◻. Cells were fabricated on the SWNT/plastic anodes identically to a process optimized for ITO/glass. Efficiencies, 2.5% (AM1.5G), are close to ITO/glass and are affected primarily by Rs. Bending test comparisons with ITO/plastic show the SWNT/plastic electrodes to be far more flexible.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 23 )