Dye-Sensitized Solar Cells Presented by: Helen Cuiyun Zhao

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

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

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

Dye-sensitizers

Mechanism

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

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

Light Harvesting — UV-vis spectroscopy

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

Electrochemistry

Validation of DSSC Dye λ abs (nm), ε (M-1cm-1) Jsc (mA cm2) Voc FF η (%) JK-206 391 (19800), 527 (18000) 19.63 0.74 0.72 10.39 JK-207 368 (38700), 530 (16800) 13.83 0.69 0.66 6.32 N-719 380 (13100), 520 (1300) 18.79 0.75 0.7 9.8

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

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

12 Principles of Green Chem.

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.

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