Effects of Double Layer Coating on TiO₂Surface on the Photovoltaic Properties of Dye-Sensitized Solar Cells

Abstract

Double layer coating on TiO₂surfaces was performed to improve the performance of dye-sensitized solar cells (DSSCs). Nanoporous TiO₂electrode was first treated with TiCl₄followed by sintering, and then a dilute aqueous solution of Li₂CO₃was applied to doubly modify TiO₂surface via a dip coating process. The DSSC with the doubly modified TiO₂film showed a power conversion efficiency of 9.85%, enhanced from that (8.70%) of pristine TiO₂-based device, due to an improvement in short circuit current and open circuit voltage.

Keywords:

• Double layer coating
• dye-sensitized solar cell
• lithium carbonate
• surface modification

Acknowledgment

This work was supported in part by MEST and DGIST (12-BD-03, Advanced Convergence Technology for Zero Carbon Society).