Supramolecular Interactions of Chenodeoxycholic Acid Increase the Efficiency of Dye-Sensitized Solar Cells Based on a Cobalt Electrolyte
| Autor: | Chiara Anselmi, Edoardo Mosconi, Filippo De Angelis, Gabriele Marotta, Paolo Salvatori, Antonio Cinti |
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| Rok vydání: | 2013 |
| Předmět: |
Inorganic chemistry
Supramolecular chemistry chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 7. Clean energy 01 natural sciences Coatings and Films chemistry.chemical_compound Chenodeoxycholic acid Electronic Optical and Magnetic Materials Physical and Theoretical Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Surfaces Dye-sensitized solar cell Energy (all) General Energy chemistry 0210 nano-technology Cobalt |
| Zdroj: | The Journal of Physical Chemistry C Journal of physical chemistry. C 117 (2013): 3874–3887. doi:10.1021/jp4003577 info:cnr-pdr/source/autori:Paolo Salvatori, Gabriele Marotta, Antonio Cinti, Chiara Anselmi, Edoardo Mosconi, Filippo De Angelis/titolo:Supramolecular Interactions of Chenodeoxycholic Acid Increase the Efficiency of Dye-Sensitized Solar Cells Based on a Cobalt Electrolyte/doi:10.1021%2Fjp4003577/rivista:Journal of physical chemistry. C/anno:2013/pagina_da:3874/pagina_a:3887/intervallo_pagine:3874–3887/volume:117 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | A combined experimental and computational study is carried out to understand the nature of the interfaces between dye-sensitized TiO2 and cobalt-based electrolyte in the presence of a prototype coabsorbent, chenodeoxycholic acid (CDCA), employed in dye-sensitized solar cells (DSCs). It was recently reported that including CDCA both in the dye and in the electrolyte solutions substantially improved the performance of DSCs based on a Fc/Fc+ electrolyte (Daeneke et al. Nat. Chem.2011, 3, 1755) . Here, we evaluate the individual and combined effect of CDCA as a surface coadsorbent and as an additive in DSCs based on a Co(II)/Co(III) electrolyte, in combination with two prototypical Ru(II) dyes, N719 and Z907. For both dyes, the concomitant use of CDCA in the dye bath and in the electrolyte solution leads to a significant improvement, by about a factor of 2, of the DSCs photovoltaic performances, allowing us to reach 5.3% efficiency with Z907. FT-IR analyses conducted on the solid and TiO2-adsorbed CDCA highlight the presence of surface-adsorbed interacting CDCA molecules, possibly creating a bulky insulating network on the TiO2 surface. Computational analyses have been carried out to gain insight into the nature of the supramolecular aggregates occurring for CDCA on the TiO2 surface. |
| Databáze: | OpenAIRE |
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