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9-Alkylidene-9H-Fluorene-Containing Polymer for High-Efficiency Polymer Solar Cells

Du, Chun (author)
Chinese Academy of Science
Li, Cuihong (author)
Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
Li, Weiwei (author)
Chinese Academy of Science
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Chen, Xiong (author)
Chinese Academy of Science
Bo, Zhishan (author)
Beijing Normal University
Veit, Clemens (author)
Fraunhofer Institute for Solar Energy Systems ISE
Ma, Zaifei (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Wuerfel, Uli (author)
Fraunhofer Institute for Solar Energy Systems ISE
Zhu, Hongfei (author)
Chinese Academy of Science
Hu, Wenping (author)
Chinese Academy of Science
Zhang, Fengling (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska högskolan
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 (creator_code:org_t)
2011-09-08
2011
English.
In: Macromolecules. - : American Chemical Society. - 0024-9297 .- 1520-5835. ; 44:19, s. 7617-7624
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • A novel donor-acceptor copolymer containing 9-alkylidene-9H-fluorene unit in the main chain, poly[9-(1-hexylheptylidene)-2,7-fluorene-alt-5, 5-(4,7-di-2-thienyl-5,6-dialkoxy-2,1,3-benzothiadiazole)] (PAFDTBT), has been synthesized and evaluated in bulk heterojunction polymer solar cells (BHJ PSCs). The polymer possesses a low band gap of 1.84 eV, a low-lying HOMO energy level (5.32 eV), and excellent solubility in common organic solvents. PSCs based on PAFDTBT and (6,6)-phenyl-C(71)-butyric add methyl ester (PC(71)BM) demonstrate a power conversion efficiency (PCE) of 6.2% with a high fill factor (FF) of 0.70, which indicates that 9-alkylidene-9H-fluorene can be a very useful building block for constructing narrow band gap conjugated polymers for high-efficiency BHJ PSCs.

Keyword

TECHNOLOGY
TEKNIKVETENSKAP

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