Attachment of an Organic Dye on a TiO2 Substrate in Supercritical CO2: Application to a Solar Cell

Attachment of eosin Y onto TiO2 electrode was carried out using super critical CO2 as a solvent. The solar cell composed of an electrode which prepared under the condition of 493 K and 25 MPa in super critical CO2 , showed an efficient fill factor as high as 95% (a Xe lamp with a 517 nm band pass filter). The dye was supposed to keep its structure under such sever conditions. Super critical CO2 made possible to carry out the attachment of dye at high temperature in a uniform phase.