Abstract
Two new Ruthenium-based dyes with carbazole groups (Ru-DiCz) or triphenyl amine groups (Ru-DiTPA) as donor moieties of a ligand were studied for ZnO-based dye-sensitized solar cells. Strong electron-rich donor moieties in both dyes induced a high molar extinction coefficient, thereby enhancing the overall power conversion efficiency through high JSC value. With limited acidic carboxyl anchor groups on the new Ru-dyes, the solar cells showed superior stability without aggregation of ZnO nanoparticles for a long-term immersion compared with a reference N3 sensitizer.
Acknowledgments
This work was supported by the National Research Foundation (NRF) grant funded by the Korea government (MSIP) through the Active Polymer Center for Pattern Integration (No. 2007-0056091). We also acknowledge the financial support from the Chung-Ang University (Research Grants in 2013).