Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells

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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