A blue dye-sensitized solar cell based on a covalently bridged oligothiophene chromophore

[Display omitted] Two quaterthiophenes with a terminal electron acceptor cyanoacrylic acid anchoring group have been synthesized to serve as metal-free sensitizers in titanium dioxide-based dye-sensitized solar cells (DSSCs). The covalent bridging of the acceptor group with the adjacent thiophene ri...

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Bibliographic Details
Published in:Tetrahedron letters 2016-01, Vol.57 (4), p.505-508
Main Authors: Demeter, Dora, Melchiorre, Fabio, Biagini, Paolo, Po, Riccardo, Roncali, Jean
Format: Article
Language:English
Subjects:
Charge-transfer
Chemical Sciences
Color modulation
Dye-sensitized solar cells
Material chemistry
Metal-free sensitizer
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Summary:[Display omitted] Two quaterthiophenes with a terminal electron acceptor cyanoacrylic acid anchoring group have been synthesized to serve as metal-free sensitizers in titanium dioxide-based dye-sensitized solar cells (DSSCs). The covalent bridging of the acceptor group with the adjacent thiophene ring by an ortho-phenylene unit leads to a large red shift of the internal charge-transfer band and to a strong decrease in its relative intensity. As a consequence of these spectral modifications, the color of the dye changes from orange to blue both in solution and after chemisorption on titanium dioxide. A preliminary evaluation of the bridged dye in DSSCs shows that the production of the blue color is associated with a decrease of the conversion efficiency of the cell.
ISSN:0040-4039
1873-3581
DOI:10.1016/j.tetlet.2015.12.077