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

Paper ID Volume ID Publish Year Pages File Format Full-Text
26584 43965 2015 8 PDF Available
Title
Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells
Abstract

•Coumarin dye with ethynyl rigid spacer.•Dye with low charge recombination at the nanocrystaline TiO2/dye/redox electrolyte interface.•Dye with blocking effect on the approach of I3-ions on the TiO2 surface.

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
Coumarin dyes; Alkyne bridge; Dye-sensitized solar cells; EIS analysis; Charge recombination; Dye aggregation
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Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 310, 1 September 2015, Pages 1–8
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us