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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 7
BKCSDE 34(7)
July 20, 2013 

Effects of Fused Thiophene Bridges in Organic Semiconductors for Solution-Processed Small-Molecule Organic Solar Cells
Jae Kwan Lee*, Sol Lee, Suk Jin Yun
Organic semiconductor, Fused thiophen, Intermolecular packing, Bulk heterojunction, Organic solar cell
Three push-pull organic semiconductors, TPA-Th3-MMN (1), TPA-ThTT-MMN (2), and TPA-ThDTTMMN (3), comprising a triphenylamine donor and a methylene malononitrile acceptor linked by various π- conjugated thiophene units were synthesized, and the effects of the π-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 π-conjugation effectively facilitated intermolecular π-π packing interactions in the solid state, resulting in enhanced Jsc values of the SMOSCs fabricated with bulk heterojunction films.
2148 - 2154
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