Dye-Sensitized Solar Cells Presented by: Helen Cuiyun Zhao
Dec 21, 2015
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
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
Mechanism
RuN
N
NN
O
OO
N
O
O
O OH
O
OH
CB -0.5
0.0
0.5
1.0
E (
V)
vs
NH
E
S0/S+
S*
e-
e-
e-
e-
Red OxMediator
Voc
EF +
Synthesis
N N
S SRu
Cl
Cl
ClRu
Cl
N N
F
F
HOOCCOOH
+ +/ Ar / 4hrs
excess of NH4NCS
N
N
S
S
NN
F
F
HOOC
COOH
Ru
N
C
S
NN
F
F
HOOC
COOH
Ru
N
C
S
N
N S
OO
S
OO
N N
S
O
OS
O
O RuCl
Cl
ClRu
Cl
N N
F
F
HOOCCOOH
+ +/ Ar / 4hrs
excess of NH4NCS
JK-206
JK-207
DMF
DMF
RuCl2 dimer CNN ligandBpy ligand
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
Homemade DSSC
http://alpha.chem.umb.edu/faculty/rochford/documents/Artificialphotosynthesis-aworkshopinsolarcelldesign.pdf
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.