The counter electrode for a dye-sensitized solar battery is composed of a plastic film with a transparent conductive layer and a polymer conductive layer provided on the above transparent conductive layer, and the above polymer conductive layer is composed mainly of a conductive polymer and does not contain practically any compound of PKa3 or less other than the conductive polymer. 透明導電層を備えるプラスチックフィルムおよび該透明導電層のうえに設けられた高分子導電層からなり、該高分子導電層は、導電性高分子を主たる成分としてなるとともに導電性高分子以外にはPKa3以下の化合物を実質的に含有しないことを特徴とする、色素増感型太陽電池の対極。 - 特許庁