Journal
CHEMPHYSCHEM
Volume 10, Issue 7, Pages 1117-1124Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200900111
Keywords
dyes/pigments; electrochemical impedance spectroscopy; electron transport; photochemistry; solar cells
Funding
- Portuguese Foundation for Science and Techonology (FCT)
- Swiss Notional Science Foundation
Ask authors/readers for more resources
We report on the effect of substituting the two tetrabutyl ammonium counter ions of the standard N719 dye by sodium ions on the performance and stability of dye-sensitized solar cells (DSCs). The disodium analogue of N719 in conjunction with a non-volatile electrolyte gives a conversion efficiency of 7.6% under standard global AM 1.5 sunlight. Devices maintain 99% of their initial performance after 1000 h under full sun-light aging at 50 degrees C. Electrochemical impedance spectroscopy and photovoltage transient decay studies reveal the evolution of the solar cell parameters during aging. Remarkably, upon aging a decrease in the rate of electron back reaction with the triiodide ions across the TiO2/electrolyte interface appears as well as enhanced electronic conduction in the TiO2 film.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available