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EnglishDye sensitized solar cells (DSSCs) are not yet commercialized on large scale due to their issues concerning safety and long-term stability. In fact, standard high-efficiency DSSCs are prepared mainly with organic solvent-based liquid electrolytes, i.e. acetonitrile and methoxypropionitrile, and are often characterized by high vapor pressure, toxicity and flammability. In recent years, with the idea of creating efficient, safe, and low-cost DSSCs, the research moved the attention towards alternative solvent-based electrolytes. Above all, DSSCs with water-based electrolytes look like one of the best solution providing reduced costs, nonflammability, better stability, and environmental compatibility. Moreover, the possibility of gelling the liquid solvent into a polymeric matrix can reduce the electrolyte leakage outside the device, increasing the long-term stability. In this contribution, the investigation on a series of iodine/cobalt-based 100% aqueous electrolytes is presented. In parallel, photoanode preparation and sensitization is studied to achieve the best electrode/electrolyte interfaces. Finally, the gelation of aqueous electrolytes with bio-derived polymers is presented, leading to lab-scale devices stable for several months.
Aqueous dye-sensitized solar cells: challenges in electrodes and electrolytes design / Bella, Federico; Galliano, S.; Barolo, C.; Boschloo, G.; Giordano, F.; Grätzel, M.; Hagfeldt, A.; Viscardi, G.; Gerbaldi, Claudio. - ELETTRONICO. - (2017). ((Intervento presentato al convegno DSSC strikes back − 1st Dyenamo DSSC Conference tenutosi a Uppsala (Sweden) nel 16-17 October 2017.
| Titolo: | Aqueous dye-sensitized solar cells: challenges in electrodes and electrolytes design |
| Autori: | |
| Data di pubblicazione: | 2017 |
| Abstract: | Dye sensitized solar cells (DSSCs) are not yet commercialized on large scale due to their issues concerning safety and long-term stability. In fact, standard high-efficiency DSSCs are prepared mainly with organic solvent-based liquid electrolytes, i.e. acetonitrile and methoxypropionitrile, and are often characterized by high vapor pressure, toxicity and flammability. In recent years, with the idea of creating efficient, safe, and low-cost DSSCs, the research moved the attention towards alternative solvent-based electrolytes. Above all, DSSCs with water-based electrolytes look like one of the best solution providing reduced costs, nonflammability, better stability, and environmental compatibility. Moreover, the possibility of gelling the liquid solvent into a polymeric matrix can reduce the electrolyte leakage outside the device, increasing the long-term stability. In this contribution, the investigation on a series of iodine/cobalt-based 100% aqueous electrolytes is presented. In parallel, photoanode preparation and sensitization is studied to achieve the best electrode/electrolyte interfaces. Finally, the gelation of aqueous electrolytes with bio-derived polymers is presented, leading to lab-scale devices stable for several months. |
| Appare nelle tipologie: | 4.2 Abstract in Atti di convegno |
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