We have fabricated a flexible organic solar cells, with an active layer of poly(3-hexylthiophene) (P3HT) blended with Fullerene derivative [6,6]-phenyl–C61–butyric acid methyl ester (PCBM) which was deposited by spin coating. The poly(3,4-ethylene dioxythiophene) poly(4-styrenesulfonate) (PEDOT:PSS), doped with ethylene glycol (EG) and single wall carbon nanotubes (SWCNTs), is heavily doped and therefore used as conductive transparent electrode rather than electron blocking layer. Likewise, we have deposited a layer of PEDOT:PSS/SWCNTs by spin coating. This layer is coated onto polyethylene terephthalate (PET) substrates. We have also compared the photovoltaic characteristics of the two different structures with PEDOT:PSS/SWCNTs or PEDOT:PSS/SWCNTs/PEDOT:PSS photoanode. Both structures show significant photovoltaic behavior. However, the power conversion efficiency has been scaled up from 1.02% to 1.93% resulting from the use of second layer of PEDOT:PSS.

References

References
1.
Li
,
Y. F.
,
Wong
,
I. S.
,
Lai
,
T. C.
,
Chin
,
W.
, and
Hsu
,
W. K.
, 2010, “
Carbon Nanotube Stabilized Conductive Polymers
,”
Appl. Phys. Lett.
,
97
, p.
153123
.
2.
Galagan
,
Y.
,
J. M. Rubingh
,
J.-E.
,
Andriessen
,
R.
,
Fan
,
C. C.
,
W. M. Blom
,
P.
,
C. Veenstra
,
S.
, and
M. Kroon
,
J.
, 2011, “
ITO-Free Flexible Organic Solar Cells With Printed Current Collecting Grids
,”
Sol. Energy Mater. Sol. Cells
,
95
, pp.
1339
1343
.
3.
Spitsina
,
N. G.
,
Romanova
,
I. P.
,
Lobach
,
A. A.
,
Yakuschenko
,
I. K.
,
Lobach
,
A. S.
,
Kaplunov
,
M. G.
,
Tolstov
,
I. V.
,
Triebel
,
M. M.
, and
Frankevich
,
E. L.
, 2006, “
Materials for Flexible Organic Photovoltaic Cells: Conjugated Polymer MEH-PPV/Fullerene Composites
,”
Fullerenes, Nanotubes, Carbon Nanostruct.
,
14
, pp.
435
439
.
4.
Zongyou
,
Y.
,
Shuangyong
,
S.
,
Teddy
,
S.
,
Shixin
,
W.
,
Xiao
,
H.
,
Qiyuan
,
H.
,
Yeng
,
M. L.
, and
Hua
,
Z.
, 2010, “
Organic Photovoltaic Devices Using Highly Flexible Reduced Graphene Oxide Films as Transparent Electrodes
,”
ACS Nano
,
9
, pp.
5263
5268
.
5.
Ray
,
B.
,
Lundstrom
,
M. S.
, and
Alam
,
M. A.
, 2012, “
Can Morphology Tailoring Improve the Open Circuit Voltage of Organic Solar Cells?
,”
Appl. Phys. Lett.
,
100
, p.
013307
.
6.
Chen
,
D.
,
Nakahara
,
A.
,
Wei
,
D.
,
Nordlund
,
D.
, and
Russell
,
T. P.
, 2011, “
P3HT/PCBM Bulk Heterojunction Organic Photovoltaics: Correlating Efficiency and Morphology
,”
Nano Lett.
,
11
, pp.
561
567
.
7.
Zhao
,
G.
,
He
,
Y.
, and
Li
,
Y.
, 2010, “
6.5% Efficiency of Polymer Solar Cells Based on Poly(3-Hexylthiophene) and Indene-C(60) Bisadduct by Device Optimization
,”
Adv. Mater.
,
22
, pp.
4355
4358
.
8.
Hu
,
Z.
,
Zhang
,
J.
,
Hao
,
Z.
, and
Zhao
,
Y.
, 2011, “
Influence of Doped PEDOT:PSS on the Performance of Polymer Solar Cells
,”
Sol. Energy Mater. Sol. Cells
,
95
, pp.
2763
2767
.
9.
Bhosle
,
V.
,
Tiwari
,
A.
, and
Narayan
,
J.
, 2006, “
Metallic Conductivity and Metal-Semiconductor Transition in Ga-doped ZnO
,”
Appl. Phys. Lett.
,
88
, p.
032106
.
10.
Phipps
,
G.
,
Mikolajczak
,
C.
, and
Guckes
,
T.
, 2009,
22nd EU PV Solar Conference
,
Milan
, Italy.
11.
Wang
,
T.
,
Qi
,
Y.
,
Xu
,
J.
,
Hu
,
X.
, and
Chen
,
P.
, 2003, “
Effect of Addition of Poly-(Ethylene Glycol) on Electrical Conductivity of Poly(3,4-Ethylenedioxythiophene)-Poly(Styrenesulfonate) Hybrid
,”
Chin. Sci. Bull.
,
22
, pp.
2444
2445
.
12.
Anto
,
P. L.
,
Panicker
,
C. Y.
,
Varghese
,
H. T.
, and
Philip
,
D.
, 2006, “
Potential-Dependent SERS Profile of Orthanilic Acid on Silver Electrode
,”
J. Raman Spectrosc.
,
37
, pp.
1265
1271
.
13.
Tipson
,
R. S.
,
Isbell
,
H. S.
, and
Stewart
,
J. E.
, 1959, “
Infrared Absorption Spectra of Some Cyclic Acétals of Sugars
,”
J. Res. Natl. Bur. Stand.
,
62
, pp.
257
282
.
14.
Kwon
,
O. H.
,
Park
,
K.
, and
Jang
,
D. J.
, 2001, “
Photoluminescence Dynamics and Spectra of C60 and C60– in VPI-5 Molecular Cages
,”
Chem. Phys. Lett.
,
346
, pp.
195
200
.
15.
Shiraishi
,
M.
, and
Ata
,
M.
, 2001, “
Work Function of Carbon Nanotubes
,”
Carbon
,
39
, pp.
1913
1917
.
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