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Conjugated Polymer-Based Flexible Photovoltaic Cells with Controlled Nanostructures

Published online by Cambridge University Press:  26 February 2011

Myung-Su Kim ,
Jin-Sung Kim ,
Jae Cheol Cho ,
Max Shtein ,
L. Jay Guo  and
Jinsang Kim
Myung-Su Kim
Affiliation:
myungsu@umich.edu, University of Michigan, Materials Science and Engineering, 2300 Hayward St., Ann Arbor, MI, 48109, United States
Jin-Sung Kim
Affiliation:
jinskim@umich.edu, University of Michigan, Electrical Engineering and Computer Science, Ann Arbor, MI, 48109, United States
Jae Cheol Cho
Affiliation:
jccho@engin.umich.edu, University of Michigan, Materials Science and Engineering, Ann Arbor, MI, 48109, United States
Max Shtein
Affiliation:
mshtein@umich.edu, University of Michigan, Materials Science and Engineering, Ann Arbor, MI, 48109, United States
L. Jay Guo
Affiliation:
guo@eecs.umich.edu, University of Michigan, Electrical Engineering and Computer Science, Ann Arbor, MI, 48109, United States
Jinsang Kim
Affiliation:
jinsang@umich.edu, University of Michigan, Materials Science and Engineering, Ann Arbor, MI, 48109, United States
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Abstract

We demonstrate that conjugated polymers (CPs)-based flexible solar cells with well-defined interdigitated donor-acceptor interfaces enhance charge separation and transport. The welldefined straight donor-acceptor interfaces are achieved successful application of nanoimprinting technology to rationally designed energy harvesting and hole transporting conjugated polymers. Nanoimprinting enables the precise and direct nano-scale control of the shape of the donoracceptor interface on both rigid and flexible substrates. Comparison between the performances of the solar cells having imprinted different feature sizes revealed that the short circuit current can be systematically increased by the interfacial area of the heterojunction without affecting the open circuit voltage. The results also showed that the vertically oriented heterojunction facilitate charge transport and allow synergistically improved fill factor, open circuit current, and ensuing energy conversion efficiency beyond the gain of the interfacial area of the heterojunction.

Keywords

photovoltaicpolymerdevices
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 974: Symposium CC – Solar Energy Conversion , 2006 , 0974-CC10-15
Copyright
Copyright © Materials Research Society 2007

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References

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