Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells
A chromophore containing a coplanar dihexyl-substituted dithienosilole (CL1) synthesised for use in dye-sensitised solar cells displayed an energy conversion efficiency of 6.90% under AM 1.5 sunlight irradiation. The new sensitiser showed a similar fill factor and open-circuit voltage when compared...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2017/7594869 |
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| author | Ciaran Lyons Neelima Rathi Pratibha Dev Owen Byrne Praveen K. Surolia Pathik Maji J. M. D. MacElroy Aswani Yella Michael Grätzel Edmond Magner Niall J. English K. Ravindranathan Thampi |
| author_facet | Ciaran Lyons Neelima Rathi Pratibha Dev Owen Byrne Praveen K. Surolia Pathik Maji J. M. D. MacElroy Aswani Yella Michael Grätzel Edmond Magner Niall J. English K. Ravindranathan Thampi |
| author_sort | Ciaran Lyons |
| collection | DOAJ |
| description | A chromophore containing a coplanar dihexyl-substituted dithienosilole (CL1) synthesised for use in dye-sensitised solar cells displayed an energy conversion efficiency of 6.90% under AM 1.5 sunlight irradiation. The new sensitiser showed a similar fill factor and open-circuit voltage when compared with N719. Impedance measurements showed that, in the dark, the charge-transfer resistance of a cell using CL1 in the intermediate-frequency region was higher compared to N719 (69.8 versus 41.3 Ω). Under illumination at AM 1.5G-simulated conditions, the charge-transfer resistances were comparable, indicative of similar recombination rates by the oxidised form of the redox couple. The dye showed instability in ethanol solution, but excellent stability when attached to TiO2. Classical molecular dynamics indicated that interactions between ethanol and the dye are likely to reduce the stability of CL1 in solution form. Time-dependent density functional theory studies were performed to ascertain the absorption spectrum of the dye and assess the contribution of various transitions to optical excitation, which showed good agreement with experimental results. |
| format | Article |
| id | doaj-art-e58a150e48c74089a00abd5def3cdfe6 |
| institution | OA Journals |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-e58a150e48c74089a00abd5def3cdfe62025-08-20T02:21:19ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2017-01-01201710.1155/2017/75948697594869Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar CellsCiaran Lyons0Neelima Rathi1Pratibha Dev2Owen Byrne3Praveen K. Surolia4Pathik Maji5J. M. D. MacElroy6Aswani Yella7Michael Grätzel8Edmond Magner9Niall J. English10K. Ravindranathan Thampi11SFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandLaboratoire de Photonique et Interfaces (LPI), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, SwitzerlandLaboratoire de Photonique et Interfaces (LPI), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, SwitzerlandSFI Strategic Research Cluster in Solar Energy Conversion, Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandSFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, IrelandA chromophore containing a coplanar dihexyl-substituted dithienosilole (CL1) synthesised for use in dye-sensitised solar cells displayed an energy conversion efficiency of 6.90% under AM 1.5 sunlight irradiation. The new sensitiser showed a similar fill factor and open-circuit voltage when compared with N719. Impedance measurements showed that, in the dark, the charge-transfer resistance of a cell using CL1 in the intermediate-frequency region was higher compared to N719 (69.8 versus 41.3 Ω). Under illumination at AM 1.5G-simulated conditions, the charge-transfer resistances were comparable, indicative of similar recombination rates by the oxidised form of the redox couple. The dye showed instability in ethanol solution, but excellent stability when attached to TiO2. Classical molecular dynamics indicated that interactions between ethanol and the dye are likely to reduce the stability of CL1 in solution form. Time-dependent density functional theory studies were performed to ascertain the absorption spectrum of the dye and assess the contribution of various transitions to optical excitation, which showed good agreement with experimental results.http://dx.doi.org/10.1155/2017/7594869 |
| spellingShingle | Ciaran Lyons Neelima Rathi Pratibha Dev Owen Byrne Praveen K. Surolia Pathik Maji J. M. D. MacElroy Aswani Yella Michael Grätzel Edmond Magner Niall J. English K. Ravindranathan Thampi Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells International Journal of Photoenergy |
| title | Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells |
| title_full | Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells |
| title_fullStr | Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells |
| title_full_unstemmed | Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells |
| title_short | Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells |
| title_sort | organic dyes containing coplanar dihexyl substituted dithienosilole groups for efficient dye sensitised solar cells |
| url | http://dx.doi.org/10.1155/2017/7594869 |
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