Torres, É., Sequeira, S., Parreira, P. , Mendes, P., Silva, T., Lobato, K. and Brites, M. J. (2015) Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells. Journal of Photochemistry and Photobiology A: Chemistry, 310, pp. 1-8. (doi: 10.1016/j.jphotochem.2015.05.017)
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Abstract
C1-LEN coumarin dye, containing an ethynyl conjugated bridge was tested as a new chromophore for dye-sensitized solar cells (DSSCs). Investigation on the relationship of dye structure, optical properties, electrochemical properties and performance of DSSCs is described. The C1-LEN-sensitized solar cells showed an overall conversion efficiency of 2.2% (JSC = 6.11 mA/cm2, VOC = 547 mV, FF = 0.66), which corresponds to 68% of N719-based device efficiency, fabricated under similar conditions. Electrochemical impedance spectroscopy (EIS) analysis reveals that charge recombination at the nanocrystalline TiO2/dye/redox electrolyte interface is similar for C1-LEN and N719 sensitized solar cells, i.e., charge recombination is not the factor limiting the performance of C1-LEN device.
| Item Type: | Articles (Letter) |
|---|---|
| Additional Information: | This work was supported by National Funds through FCT— Foundation for Science and Technology under the Project PTDC/ CTM-CER/111590/2009. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Parreira, Dr Pedro Miguel |
| Authors: | Torres, É., Sequeira, S., Parreira, P., Mendes, P., Silva, T., Lobato, K., and Brites, M. J. |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Journal of Photochemistry and Photobiology A: Chemistry |
| Publisher: | Elsevier |
| ISSN: | 1010-6030 |
| Published Online: | 21 May 2015 |
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