Organic solar cells with carbon nanotube network electrodes

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 (R-s) of 200 Omega/rectangle. 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 R-s Bending test comparisons with ITO/plastic show the SWNT/plastic electrodes to be far more flexible. (c) 2006 American Institute of Physics.