Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Effects of Fused Thiophene Bridges in Organic Semiconductors for Solution-Processed Small-Molecule Organic Solar Cells

  • Lee, Jae Kwan (Department of Chemistry Education, Chosun University) ;
  • Lee, Sol (Department of Green Energy Engineering, Hoseo University) ;
  • Yun, Suk Jin (Department of Chemistry Education, Chosun University)
  • Received : 2013.03.31
  • Accepted : 2013.04.24
  • Published : 2013.07.20
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Abstract

Three push-pull organic semiconductors, TPA-$Th_3$-MMN (1), TPA-ThTT-MMN (2), and TPA-ThDTT-MMN (3), comprising a triphenylamine donor and a methylene malononitrile acceptor linked by various ${\pi}$-conjugated thiophene units were synthesized, and the effects of the ${\pi}$-conjugated bridging unit on the photovoltaic characteristics of solution-processed small-molecule organic solar cells based on these semiconductors were investigated. Planar bridging units with extended ${\pi}$-conjugation effectively facilitated intermolecular ${\pi}-{\pi}$ packing interactions in the solid state, resulting in enhanced $J_{sc}$ values of the SMOSCs fabricated with bulk heterojunction films.

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References

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