Facile synthesis of metal-free organic dyes featuring a thienylethynyl spacer for dye sensitized solar cells

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Abstract

In this article, we report the facile synthesis of metal-free dyes 6 and 7, their solution-based optical and redox properties and their use as sensitizers in dye-sensitized solar cells (DSSCs). Our studies indicate that the addition of the second thiophene unit in dye 7, decreases the oxidation and reduction potential and consequently the band gap of the molecule compared to 6. Furthermore, increasing the length of the conjugated spacer also affects on the properties of the DSSCs, with dye 7 providing a higher power conversion efficiency compared to 6 (η = 4.49 versus 3.23%). © 2014 The Authors. Published by Elsevier Ltd. All rights reserved.

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Al-Eid, M., Lim, S., Park, K. W., Fitzpatrick, B., Han, C. H., Kwak, K., … Cooke, G. (2014). Facile synthesis of metal-free organic dyes featuring a thienylethynyl spacer for dye sensitized solar cells. Dyes and Pigments, 104, 197–203. https://doi.org/10.1016/j.dyepig.2014.01.004

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