An investigation of the role the donor moiety plays in modulating the efficiency of ‘donor-π-acceptor-π-acceptor’ organic DSSCs

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• 作者：Kwang-Won Park^a ; ¹ ; Luis A. Serrano^b ; ¹ ; Sungwoo Ahn^a ; Myung Hoon Baek^a ; Alan A. Wiles^b ; Graeme Cooke^b ; ^{Graeme.Cooke@glasgow.ac.uk} ; Jongin Hong^a ; ^{hongj@cau.ac.kr}
• 关键词：Dye-sensitized solar cell ; Organic photosensitizer ; Donor ; Benzothiadiazole
• 刊名：Tetrahedron
• 出版年：2017
• 出版时间：23 February 2017
• 年：2017
• 卷：73
• 期：8
• 页码：1098-1104
• 全文大小：1317 K
• 卷排序：73

文摘

Three ‘D-π-A-π-A’ based dyes have been synthesized featuring MeO-, MeS- and Me2N- as donor residues and benzothiadiazole and cyanoacrylic acid residues as acceptor units. UV–vis spectroscopy, solution electrochemistry and DFT modelling indicated that the Me2N- residue has the most significant effect on optical and redox properties of a photosensitizer. DSSCs with the Me2N- functionalized dye gave the highest power conversion efficiency of the series (η = 5.61%), presumably due to the better donor ability of this unit, which promotes more effective intramolecular charge transfer (ICT) characteristics.