Dithiafulvene-based organic sensitizers using pyridine as the acceptor for dye-sensitized solar cells

被引：9

作者：

Cheng, Jun ^{[1
]}

Cao, Yaxiong ^{[1
]}

Liang, Xiaozhong ^{[1
]}

Zheng, Jingxia ^{[1
]}

Zhang, Fang ^{[1
]}

Wei, Shuxian ^{[3
]}

Lu, Xiaoqing ^{[3
]}

Guo, Kunpeng ^{[1
]}

Yang, Shihe ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Res Ctr Adv Mat Sci & Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Chem, Clear Water Bay, Kowloon, Hong Kong, Peoples R China

[3] China Univ Petr, Coll Sci, Qingdao 266555, Shandong, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2017年 / 192卷

关键词：

Electrochemical techniques; Organic compounds; Chemical synthesis; Optical materials; INJECTING ANCHORING GROUP; FLUORESCENT DYES; EFFICIENCY; DONOR; RING;

D O I：

10.1016/j.matchemphys.2017.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three dithiafulvene-based metal -free organic sensitizers all using pyridine as the acceptor but with different pi-bridges of phenyl (DTF-Pyl), 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 pi-bridge, as well as extension of the it -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. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：349 / 355

页数：7

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