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
Bpy ligand
RuCl2 dimer
JK-206
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.
Thank You!