Dye-adsorption method for dye-sensitized solar cells, working electrode and dye-sensitized solar cells using the same

摘要

The present invention relates to a dye-adsorption method for dye-sensitized solar cells, and photoelectrode electrodes and dye-sensitized solar cells using the same. The dye-adsorption method includes a step of forming a porous layer by a sintering process after a paste including metallic oxide nanoparticles is coated on the upper surface of a titanium oxide thin film, a step of reforming the surface of the porous layer by dipping the porous layer into an acidic solution, and a step of adsorbing a photosensitive dye to the surface of the porous layer by dipping the reformed porous layer in a photosensitive dye dispersed into an organic solution. Because there are positive charges on the surface of the porous layer, dye desorption is not generated in the short and long term even if the dye adsorption is quickly carried out and the adsorption time is short. Therefore, the long-run stability of solar cells can be obtained. [Reference numerals] (AA) Chitosan-funtionalized-NC (Chito-NC); (BB) Step for reforming the surface of the porous layer; (CC) Step for adsorbing a photosensitive dye to the surface of the porous layer