In recent years, with the idea of creating efficient, safe, stable and low-cost dye-sensitized solar cells (DSSCs), the research moved the attention towards alternative solvent-based electrolytes. In particular, DSSCs with water-based electrolytes have been proposed as one of the possible solution providing reduced costs, non-flammability and environmental compatibility. Recently we demonstrated that stability issues can be properly addressed by choosing the appropriate dye. Moreover, the possibility of gelling the liquid solvent into a polymeric matrix can reduce the electrolyte leakage outside the device, thus increasing the long-term stability. Above all, bio-derived polymers appear promising being renewable and easy available with low cost. In this work, the study on a series of iodine and cobalt-based 100% aqueous electrolytes is presented. Thanks to our previous experience and to a multivariate approach (Design of Experiment), the effects of the photoanode preparation and the electrolyte compositions have been evaluated on DSSCs performances. Finally, the gelation of aqueous electrolytes with bio-derived polymers has been performed and evaluated. Photovoltaic performances and stabilities will be discussed by comparing liquid and gel electrolytes. In lab-scale solar cells interesting photovoltaic performances superior to 4% were achieved.

Hydrogel electrolytes based on bio-derived polymers for solar cells / Galliano, S.; Bella, F.; Falco, M.; Barolo, C.; Giordano, F.; Boschloo, G.; Grätzel, M.; Hagfeldt, A.; Gerbaldi, C.; Viscardi, G.. - STAMPA. - (2017), pp. 75-75. ((Intervento presentato al convegno Merck Young Chemists Symposium – XVII Edition tenutosi a Milano Marittima (Italy) nel November 13th-15th, 2017.

Hydrogel electrolytes based on bio-derived polymers for solar cells

F. Bella;M. Falco;C. Gerbaldi;
2017

Abstract

In recent years, with the idea of creating efficient, safe, stable and low-cost dye-sensitized solar cells (DSSCs), the research moved the attention towards alternative solvent-based electrolytes. In particular, DSSCs with water-based electrolytes have been proposed as one of the possible solution providing reduced costs, non-flammability and environmental compatibility. Recently we demonstrated that stability issues can be properly addressed by choosing the appropriate dye. Moreover, the possibility of gelling the liquid solvent into a polymeric matrix can reduce the electrolyte leakage outside the device, thus increasing the long-term stability. Above all, bio-derived polymers appear promising being renewable and easy available with low cost. In this work, the study on a series of iodine and cobalt-based 100% aqueous electrolytes is presented. Thanks to our previous experience and to a multivariate approach (Design of Experiment), the effects of the photoanode preparation and the electrolyte compositions have been evaluated on DSSCs performances. Finally, the gelation of aqueous electrolytes with bio-derived polymers has been performed and evaluated. Photovoltaic performances and stabilities will be discussed by comparing liquid and gel electrolytes. In lab-scale solar cells interesting photovoltaic performances superior to 4% were achieved.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2693645
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