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Highly Efficient Solar Cells Using Organic Dyes with Amorphous Moiety

Published online by Cambridge University Press:  26 February 2011

Sanghoon Kim ,
Jae Kwan Lee ,
Il Jung ,
Kyu-Ho Song ,
Chul Baik ,
Hyunbong Choi ,
Duckhyun Kim ,
S. Fantacci ,
F. De Angelis  and
J -H Yum
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Sanghoon Kim
Affiliation:
hheli123@korea.ac.kr, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
Jae Kwan Lee
Affiliation:
leejk77@korea.ac.kr, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
Il Jung
Affiliation:
lovewolf@korea.ac.kr, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
Kyu-Ho Song
Affiliation:
skmh@korea.ac.kr, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
Chul Baik
Affiliation:
cancer107@korea.ac.kr, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
Hyunbong Choi
Affiliation:
malquemi@daum.net, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
Duckhyun Kim
Affiliation:
duckhyun@korea.ac.kr, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
S. Fantacci
Affiliation:
leejk77@korea.ac.kr, Università di Perugia, Perugia, I-06123, Italy
F. De Angelis
Affiliation:
leejk77@korea.ac.kr, Università di Perugia, Perugia, I-06123, Italy
J -H Yum
Affiliation:
junho.yum@epfl.ch, Swiss Federal Institute of Technology, Lausanne, CH - 1015, Switzerland
Md. K. Nazeeruddin
Affiliation:
makhaja.nazeeruddin@epfl.ch, Swiss Federal Institute of Technology, Lausanne, CH - 1015, Switzerland
M. Graetzel
Affiliation:
michael.graetzel@epfl.ch, Swiss Federal Institute of Technology, Lausanne, CH - 1015, Switzerland
Jaejung Ko
Affiliation:
jko@korea.ac.kr, Korea University, Chungcheongnam-do, 339-700, Korea, Republic of
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Abstract

Novel organic sensitizers comprising donor; electron-conducting, and anchoring groups were engineered at molecular level and synthesized. The functionalized unsymmetrical organic sensitizers 3-{5-[N,N-Bis(9,9-dimethylfluorene-2-yl)phenyl]-thiophene-2-yl}-2-cyano-acrylic acid (JK-1) and 3-{5'-[N,N-Bis(9,9-dimethylfluorene-2-yl)phenyl]-2,2'-bithiophene-5-yl}-2-cyano-acrylic acid (JK-2), upon anchoring onto TiO2 film exhibit unprecedented incident photon to current conversion efficiency 91 %. The photovoltaic data using an electrolyte having composition of 0.6M M-methyl-N-butyl imidiazolium iodide, 0.04 M iodine, 0.025 M LiI, 0.05M guanidinium thiocyanate and 0.28 M tert.butylpyridine in 15/85 (v/v) mixture of valeronitrile and acetonitrile revealed a short circuit photocurrent density of 14.0 mA/cm2, an open circuit voltage of 753 mV and a fill factor of 0.76, corresponding to an overall conversion efficiency of 8.01 % under standard AM 1.5

Keywords

photovoltaicamorphousoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 974: Symposium CC – Solar Energy Conversion , 2006 , 0974-CC08-03
Copyright
Copyright © Materials Research Society 2007

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References

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