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Influence of Sodium Cations of N3 Dye on the Photovoltaic Performance and Stability of Dye-Sensitized Solar Cells

Influence of Sodium Cations of N3 Dye on the Photovoltaic Performance and Stability of Dye-Sensitized Solar Cells

Luísa Andrade, Shaik M Zakeeruddin, Mohammad K Nazeeruddin, Helena Aguilar Ribeiro, Adélio Mendes, Michael Grätzel

Chemphyschem. 2009 May 11;10(7):1117-24.

PMID: 19308974

Abstract:

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 sunlight 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 TiO(2)/electrolyte interface appears as well as enhanced electronic conduction in the TiO(2) film.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13311450	Tetrabutylammonium triiodide		13311-45-0	Price

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