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

Torres, Erica; Sequeira, S.; Parreira, P.; Mendes, Paulo; Silva, Tiago J. L.; Lobato, Killian; Brites, Maria João

http://hdl.handle.net/10400.9/2894

Use this identifier to reference this record.

Name:	Description:	Size:	Format:
JournalPhotochemistryPhotobiologyA_Vol.310_1.pdf		191.39 KB	Adobe PDF	Download

Send Feedback

Authors

Abstract(s)

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.

Keywords

Solar cells Dyes Alkyne bridge Electrochemical impedance spectroscopy Coumarin

URI

http://hdl.handle.net/10400.9/2894

Citation

Torres, E.; Sequeira, S.; Parreira, P.; [et.al.]. - Coumarin dye with ethynyl group as p-spacer unit for dye sensitized solar cells. In: Journal of Photochemistry and Photobiology A: Chemistry, 2015, Vol. 310, p. 1-8