Dye-Sensitized Solar Cells

1. Dye-Sensitized Solar Cells Presented by: Helen Cuiyun Zhao

2. Outline • Background of Dye-sensitized Solar Cells (DSSCs) • Synthesis of Ruthenium dye-sensitizer • Characterization in photo-electrochemistry • Development of DSSC Modules • 12 Principles of Green Chem. • Conclusion

3. Irradiation of the Sun Chem. Rev. 2010, 110, 6595–6663

4. Composition of DSSC The DSSC device consists of 4 components: • semiconducting electrode • n-type TiO2 and p-type NiO • Dye-sensitizer • Light harvesting and electronic transition • Redox mediator • I- / I3- or CoII / CoIII complexes • Counter electrode • Carbon or Pt Chem. Rev. 2010, 110, 6595–6663

5. Dye-sensitizers

6. Mechanism

7. Energy Levels of DSSC Chem. Rev. 2010, 110, 6595–6663

10. Synthesis DMF JK-206 Bpy ligand RuCl2 dimer CNN ligand DMF JK-207

11. Light Harvesting— UV-vis spectroscopy

12. Excited state chemistry-Density Functional Theory LUMO +2 LUMO +1 LUMO HOMO HOMO +1 JK-206 JK-207

13. Electrochemistry

14. Validation of DSSC

15. Development of DSSC  Flexible DSSC Module Glass-based DSSC Module 

16. Homemade DSSC http://alpha.chem.umb.edu/faculty/rochford/documents/Artificialphotosynthesis-aworkshopinsolarcelldesign.pdf

17. 12 Principles of Green Chem.

18. Conclusion • DSSCs show the most promising future due to their independence, environmentally friendly, low maintenance, and low cost . • A solar energy system can be installed in any location without a connection to a power grid. • The initial investment is expensive. Once the use of electricity reaches to a certain point, the solar energy is free. • After installation, there is no recurring cost and it can be used for a long time.

19. Thank You!