Influence of the Bridging Atom on the Performance of a Low-Bandgap Bulk Heterojunction Solar Cell

Replacing a carbon atom with silicon (see figure) on the main chain of a conjugated polythiophene gives a polysilole with higher crystallinity, improved charge transport, reduced bimolecular recombination, and reduced formation of charge transfer complexes when blended with a fullerene derivative. O...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2010-01, Vol.22 (3), p.367-370
Main Authors: Scharber, Markus C., Koppe, Markus, Gao, Jia, Cordella, Fabrizio, Loi, Maria. A., Denk, Patrick, Morana, Mauro, Egelhaaf, Hans-Joachim, Forberich, Karen, Dennler, Gilles, Gaudiana, Russ, Waller, Dave, Zhu, Zhengguo, Shi, Xiaobo, Brabec, Christoph J.
Format: Article
Language:English
Subjects:
Bulk heterojunction solar cells
Carbon - chemistry
Electric Power Supplies
Organic electronics
Organic semiconductors
Photovoltaic devices
Polymer solar cells
Polymers - chemistry
Silicon - chemistry
Solar Energy
Thiophenes - chemistry
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Summary:Replacing a carbon atom with silicon (see figure) on the main chain of a conjugated polythiophene gives a polysilole with higher crystallinity, improved charge transport, reduced bimolecular recombination, and reduced formation of charge transfer complexes when blended with a fullerene derivative. Optimized bulk heterojunction solar cells using this blend give certified efficiencies of 5.2% under AM1.5 illumination.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200900529