Molecular Design of Coumarin Dyes for Stable and Efficient Organic Dye-Sensitized Solar Cells

被引：248

作者：

Wang, Zhong-Sheng ^{[1
]}

Cui, Yan ^{[1
]}

Dan-oh, Yasufumi ^{[2
]}

Kasada, Chiaki ^{[2
]}

Shinpo, Akira ^{[2
]}

Hara, Kohjiro ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

[2] Hayashibara Biochem Labs Inc, Fujita 564176, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 43期

关键词：

D O I：

10.1021/jp806927b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of coumarin dyes (NKX-2593, NKX-2807, and NKX-2883) with one or two -CN groups as electron acceptors were synthesized and applied as dye sensitizers for dye-sensitized solar cells. Compared with the dye containing one -CN group, linking one more -CN group to the pi-conjugation bridge positively shifts the lowest unoccupied molecular orbital and thus red-shifts the maximum absorption band, harvesting more photons in the long-wavelength region for photoelectric conversion. Among the three dyes studied, NKX-2883 showed the best photovoltaic performance, yielding 7.6% power conversion efficiency using a volatile electrolyte and demonstrating good photostability under visible light soaking with 6% of power conversion efficiency for 1000 h using a nonvolatile electrolyte.

引用

页码：17011 / 17017

页数：7

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