Influence of the Bridging Atom on the Performance of a Low‐Bandgap Bulk Heterojunction Solar Cell
Markus C. Scharber(Konrad Lorenz Institute for Evolution and Cognition Research), Markus Koppe, Jia Gao(University of Groningen), Fabrizio Cordella(University of Groningen), Maria Antonietta Loi(University of Groningen), Patrick Denk, Mauro Morana, Hans‐Joachim Egelhaaf, Karen Forberich, Gilles Dennler, R. Gaudiana, Dave Waller, Zhengguo Zhu, Xiaobo Shi, Christoph J. Brabec
Cited by 331Open Access
Abstract
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.
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