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Dithiafulvene-based Organic Sensitizers Using Pyridine as the Acceptor for Dye-sensitized Solar Cells

Authors Cheng, Jun
Cao, Yaxiong
Liang, Xiaozhong
Zheng, Jingxia
Zhang, Fang
Wei, Shuxian
Lu, Xiaoqing
Guo, Kunpeng
Yang, Shihe View this author's profile
Issue Date 2017
Source Materials Chemistry and Physics , v. 192, May 2017, p. 349-355
Summary Three dithiafulvene-based metal-free organic sensitizers all using pyridine as the acceptor but with different π-bridges of phenyl (DTF-Py1), thienyl (DTF-Py2) and phenyl-thienyl (DTF-Py3) have been designed, synthesized and used as photosensitizers for dye-sensitized solar cells (DSCs). Introducing thienyl unit into the π-bridge, as well as extension of the π-bridge can dramatically improve their light harvesting ability and suppress the electron recombination, thus uplifting the performance of DSCs. The overall power conversion efficiency of DSC based on DTF-Py3 shows the highest efficiency of 2.61% with a short-circuit photocurrent density of 7.99 mA cm−2, an open-circuit photovoltage of 630 mV, and a fill factor of 0.52, under standard global AM 1.5 solar light condition. More importantly, the long-term stability of the DTF-Py3 based DSCs under 500 h light-soaking has been demonstrated. © 2017 Elsevier B.V.
ISSN 0254-0584
Language English
Format Article
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