Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar Cell
Dye-sensitized solar cells (DSSCs) have been considered as a potential efficient tool for conversion of solar energy to electricity. DSSC’s rely upon the presence of a semi-conductor (e.g. TiO2) attached to the photoanode and a sensitizer (dye) for photogeneration of electrons at the SC interface. M...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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AIDIC Servizi S.r.l.
2014-10-01
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| Series: | Chemical Engineering Transactions |
| Online Access: | https://www.cetjournal.it/index.php/cet/article/view/5215 |
| _version_ | 1818871322292256768 |
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| author | R. Cisneros M. Beley F. Lapicque |
| author_facet | R. Cisneros M. Beley F. Lapicque |
| author_sort | R. Cisneros |
| collection | DOAJ |
| description | Dye-sensitized solar cells (DSSCs) have been considered as a potential efficient tool for conversion of solar energy to electricity. DSSC’s rely upon the presence of a semi-conductor (e.g. TiO2) attached to the photoanode and a sensitizer (dye) for photogeneration of electrons at the SC interface. Most efficient DSSC’s are based on Ru-organic coordination complexes as sensitizer, however the finite availability of Ru led to search for other dyes, being organic molecules or other metal-coordination complexes. The efficiency of the cell can be greatly affected by recombination of generated electrons by several processes in the cell, so co-adsorbents – organic molecules – can be added to the dye to hinder recombination of the electrons by shielding the TiO2 surface. The present investigation deals with an impedance model tested for the case of a Ru-free organic sensitizer in the presence of one co-adsorbent amongst three different molecules at various concentrations. Best performances of the cell evaluated by i-V curves and impedance spectroscopy have been observed for co-adsorbent/dye ratio near 0.1, but in most cases, addition of the co-adsorbent was shown to improve both the exchange current density for electron collection at the anode and that of recombination phenomena, which contradicts the usual belief. |
| first_indexed | 2024-12-19T12:21:04Z |
| format | Article |
| id | doaj.art-f360e69b850c4cf59941709b6e93f030 |
| institution | Directory Open Access Journal |
| issn | 2283-9216 |
| language | English |
| last_indexed | 2024-12-19T12:21:04Z |
| publishDate | 2014-10-01 |
| publisher | AIDIC Servizi S.r.l. |
| record_format | Article |
| series | Chemical Engineering Transactions |
| spelling | doaj.art-f360e69b850c4cf59941709b6e93f0302022-12-21T20:21:47ZengAIDIC Servizi S.r.l.Chemical Engineering Transactions2283-92162014-10-014110.3303/CET1441033Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar CellR. CisnerosM. BeleyF. LapicqueDye-sensitized solar cells (DSSCs) have been considered as a potential efficient tool for conversion of solar energy to electricity. DSSC’s rely upon the presence of a semi-conductor (e.g. TiO2) attached to the photoanode and a sensitizer (dye) for photogeneration of electrons at the SC interface. Most efficient DSSC’s are based on Ru-organic coordination complexes as sensitizer, however the finite availability of Ru led to search for other dyes, being organic molecules or other metal-coordination complexes. The efficiency of the cell can be greatly affected by recombination of generated electrons by several processes in the cell, so co-adsorbents – organic molecules – can be added to the dye to hinder recombination of the electrons by shielding the TiO2 surface. The present investigation deals with an impedance model tested for the case of a Ru-free organic sensitizer in the presence of one co-adsorbent amongst three different molecules at various concentrations. Best performances of the cell evaluated by i-V curves and impedance spectroscopy have been observed for co-adsorbent/dye ratio near 0.1, but in most cases, addition of the co-adsorbent was shown to improve both the exchange current density for electron collection at the anode and that of recombination phenomena, which contradicts the usual belief.https://www.cetjournal.it/index.php/cet/article/view/5215 |
| spellingShingle | R. Cisneros M. Beley F. Lapicque Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar Cell Chemical Engineering Transactions |
| title | Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar Cell |
| title_full | Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar Cell |
| title_fullStr | Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar Cell |
| title_full_unstemmed | Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar Cell |
| title_short | Electrochemical Impedance Model of a (Low-cost) Dye-Sensitized Solar Cell |
| title_sort | electrochemical impedance model of a low cost dye sensitized solar cell |
| url | https://www.cetjournal.it/index.php/cet/article/view/5215 |
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