An investigation of the role the donor moiety plays in modulating the efficiency of 'donor-π-acceptor-π-acceptor' organic DSSCs. Issue 8 (23rd February 2017)

• Record Type: Journal Article
• Authors: Park, Kwang-Won; Serrano, Luis A.; Ahn, Sungwoo; Baek, Myung Hoon; Wiles, Alan A.; Cooke, Graeme; Hong, Jongin
• Is Part Of: Tetrahedron. Volume 73:Issue 8(2017)
• Page Start: 1098
• Page End: 1104
• Publication Date: 2017-02-23
• Subjects: Dye-sensitized solar cell -- Organic photosensitizer -- Donor -- Benzothiadiazole; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tet.2016.12.061
• Languages: English
• ISSNs: 0040-4020

Abstract

Abstract: Three 'D-π-A-π-A' based dyes have been synthesized featuring MeO-, MeS- and Me2 N- as donor residues and benzothiadiazole and cyanoacrylic acid residues as acceptor units. UV–vis spectroscopy, solution electrochemistry and DFT modelling indicated that the Me2 N- residue has the most significant effect on optical and redox properties of a photosensitizer. DSSCs with the Me2 N- 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. Graphical abstract: