Counter electrode for dye-sensitized solar cell and preparation method thereof

A method of preparing a counter electrode for dye-sensitized solar cell (DSSC), including the steps of:

• preparing substrate A including a first substrate which has high temperature resistance and is not deformed at the temperature of 500° C. or less, a porous membrane including a carbon-based material and platinum nano-particles, an adhesive layer, and a second substrate;
• and
• preparing substrate B including the second substrate, and the adhesive layer and the porous membrane formed on the second substrate, by separating the first substrate having high temperature resistance from substrate A and transferring the porous membrane and the adhesive layer to the second substrate with a transfer method,
• wherein the carbon-based material is at least one selected from the group consisting of active carbon, graphite, carbon black, and graphene,
• the particle sizes of the carbon-based material and the platinum nano-particle are 10nm to 100 μ m, respectively, and
• wherein the step of preparing substrate A includes the steps of:
• forming the porous membrane including the carbon-based material and the platinum nano-particles on one face of the first substrate having high temperature resistance, and
• stacking the adhesive layer and the second substrate on the porous membrane including the carbon-based material and the platinum nano-particles in order, and heat-pressing the substrate A.