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

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• 作者：Manal Al-Eid ; SungHwan Lim ; Kwang-Won Park ; Brian Fitzpatrick ; Chi-Hwan Han ; Kyungwon Kwak ; Jongin Hong ; Graeme Cooke
• 关键词：Dye-sensitized solar cells ; Organic dye ; Metal-free ; Thiophene ; Solvatochromic ; Alkyne
• 刊名：Dyes and Pigments
• 出版年：May, 2014
• 年：2014
• 卷：104
• 期：Complete
• 页码：197-203
• 全文大小：1138 K

文摘

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 (畏聽=聽4.49 versus 3.23%).