Method for producing current collector for dye-sensitized solar cell made of porous metal sheet, current collector for dye-sensitized solar cell made of porous metal sheet, and dye-sensitized solar cell

摘要

Provided is a current collector capable of obtaining higher photoelectric conversion efficiency when used in a dye-sensitized solar cell. A method for producing a current collector for a dye-sensitized solar cell comprising a porous metal sheet comprises a step of forming a sheet comprising an alloy of a first metal component and a second metal component, and the first metal component An alloy having a positive heat of mixing and a negative heat of mixing with respect to the second metal component, and immersing the sheet in a metal melting bath of a third metal component having a freezing point lower than the melting point of the alloy. And a step of processing at a temperature lower than the minimum value of the liquidus temperature in the phase diagram of FIG. 5 and a step of taking out the processed sheet from the metal molten bath. The current collector for a dye-sensitized solar cell made of a porous metal sheet has a large number of through-holes having a nano-order diameter in which molten spherical metal lumps are fused to each other in a three-dimensional direction and communicated isotropically.