Environmental Engineering Reference
In-Depth Information
Table 2.6 Photovoltaic performance of the fullerene multiadduct acceptors
Donor/acceptor
(weight ratio)
I
sc
(mA/cm
2
)
V
oc
(V)
FF
PCE (%)
Refs
P3HT/PC
60
BM(1:1)
10.8
0.58
0.62
3.88
[
73
]
P3HT/IC
60
MA(1:1)
9.66
0.63
0.64
3.89
[
73
]
P3HT/IC
60
BA(1:1)
9.67
0.84
0.67
5.44
[
73
]
P3HT/IC
60
BA(1:1)
10.61
0.84
0.73
6.48
[
74
]
P3HT/IC
70
BA(1:1)
9.73
0.84
0.69
5.64
[
75
]
Scheme 2.15
Molecular structures of indene-fullerene adducts
2.3 Conclusion
In the past two decades, a number of organic photovoltaic materials have been
designed, synthesized, and applied in OPVs. Although, PCE of OPV cells has been
reached over 8 %, the development of active layer materials is still the key to
boost the efficiency. In order to get better photovoltaic properties, many properties,
like band gap, molecular energy level, mobility, solubility, etc., should be con-
sidered, and how to balance these parameters is the most important part to
molecular design.
References
1. Yu G, Gao J, Hummelen JC, Wudl F, Heeger AJ (1995) Polymer photovoltaic cells:
enhanced efficiencies via a network of internal donor-acceptor heterojunctions. Science
270:1789-1791. doi:
10.1126/science.270.5243.1789
2. Scharber MC, Muhlbacher D, Koppe M, Denk P, Waldauf C, Heeger AJ, Brabec CJ (2006)
Design rules for donors in bulk-heterojunction solar cells—towards 10% energy-conversion
efficiency. Adv Mater 18:789-794. doi:
10.1002/adma.200501717
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