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Synthesis, characterization and application of donor-acceptor block copolymers in nanostructured bulk heterojunction solar cells*

Published online by Cambridge University Press:  10 January 2007

M. Sommer  and
M. Thelakkat
M. Sommer
Affiliation:
Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth, Germany
M. Thelakkat*
Affiliation:
Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth, Germany
*
Mukundan.Thelakkat@uni-bayreuth.de
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Abstract

The synthesis and properties of two semiconducting donor-acceptor (D-A) block copolymers and their application in nanostructured bulk heterojunction solar cells are reported. The donor segments were obtained via nitroxide mediated polymerization of either bis(4-methoxyphenyl)-4'-vinylphenylamine or N,N'-bis(4-methoxyphenyl)-N-phenyl-N'-4-vinylphenyl-[1,1'biphenyl]-4,4'-diamine. Narrow-distributed macroinitiators, poly{bis(4-methoxyphenyl)-4'-vinylphenylamine} (PvDMTPA) and poly{N,N'-bis(4-methoxyphenyl)-N-phenyl-N'-4-vinylphenyl-[1,1'biphenyl]-4,4'-diamine} (PvDMTPD) were used to polymerize the acceptor monomer perylene diimide acrylate (PerAcr) to yield block copolymers with well-defined molecular weights. Different diblock copolymers, PvDMTPA-block-PPerAcr and PvDMTPD-block-PPerAcr, with high perylene diimide weight fractions were prepared. The block copolymers exhibited efficient fluorescence quenching. Transmission electron microscopy revealed wire-like and worm-like nanostructures throughout bulk samples. Thin film photovoltaic devices showed short circuit currents $J_{\it SC}$ of up to 1.21 mA/cm2 and power conversion efficiencies η of 0.32% under AM 1.5 illumination conditions.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 36 , Issue 3 , December 2006 , pp. 245 - 249
Copyright
© EDP Sciences, 2006

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Footnotes

*

This paper has been presented at “ECHOS06”, Paris, 28–30 juin 2006.

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