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

Wang, Zhong-Sheng and Cui, Yan and Dan-oh, Yasufumi and Kasada, Chiaki and Shinpo, Akira and Hara, Kohjiro (2008) Molecular Design of Coumarin Dyes for Stable and Efficient Organic Dye-Sensitized Solar Cells. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (43). pp. 17011-17017.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp806927b

Abstract

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.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Technology > Nanotechnology and energy applications
Material Science > Nanochemistry
ID Code:1905
Deposited By:Farnush Anwar
Deposited On:16 Dec 2008 13:42
Last Modified:16 Dec 2008 13:42

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