Flexible counter electrodes based on metal sheet and polymer film for dye-sensitized solar cells

Several types of counter electrodes based on flexible metal and plastic substrates for dye-sensitized solar cells (DSCs) have been investigated. The DSCs composed of the counter electrodes based on a stainless steel substrate, a nickel sheet and a conducting plastic film, have obtained conversion efficiencies comparable to that based on the conducting glass. The counter electrode based on the stainless steel substrate has the merit of improving the fill factor and conversion efficiency of the DSC by reducing its internal resistance. The counter electrode based on a polyester film can be aimed at lower cost markets. These counter electrodes based on the metal and plastic substrates are applicable for flexible DSCs.