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https://hdl.handle.net/10216/93087| Author(s): | Luísa Andrade Shaik M. Zakeeruddin Mohammad K. Nazeeruddin Helena Aguilar Ribeiro Adélio Mendes Michael Graetzel |
| Title: | Influence of Sodium Cations of N3 Dye on the Photovoltaic Performance and Stability of Dye-Sensitized Solar Cells |
| Issue Date: | 2009 |
| Abstract: | We report on the effect of substituting the two tetrabutyl am-monium 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 8C. 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. |
| Subject: | Engenharia química, Outras ciências da engenharia e tecnologias Chemical engineering, Other engineering and technologies |
| Scientific areas: | Ciências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias Engineering and technology::Other engineering and technologies |
| URI: | https://hdl.handle.net/10216/93087 |
| Document Type: | Artigo em Revista Científica Internacional |
| Rights: | restrictedAccess |
| Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 67121.pdf Restricted Access | 510.41 kB | Adobe PDF | Request a copy from the Author(s) |
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