Highly efficient counter electrode for dye-sensitized solar cell and method of producing the same

摘要

Disclosed herein is a counter electrode for a dye-sensitized solar cell, and a method of producing the same. The dye-sensitized solar cell includes a photoelectrode (10) containing photosensitive dye molecules. The counter electrode (20) is positioned opposite to the photoelectrode (10), and an electrolytic solution (30) is interposed between the photoelectrode (10) and the counter electrode (20). The counter electrode (20) has an electron transfer layer. The electron transfer layer has a structure in which one or more conductive materials, selected from the group consisting of a conductive polymer, platinum nanoparticles, a carbon compound, inorganic oxide particles, and a conductive polymer blend, are sequentially laminated. In the counter electrode (20), the electron transfer layer promotes smooth electron transfer through an interface between the electrolyte, containing pairs of redox ions, and the counter electrode (20). Thereby, energy conversion efficiency is significantly improved in comparison with a conventional dye-sensitized solar cell employing a counter electrode in which only a platinum layer is applied on a transparent conductive material.