In the last five years, Dye-Sensitized Solar Cells (DSSCs) based on aqueous electrolytes have attracted a lot of attention, being considered as one of the possible breakthroughs towards sustainable DSSCs. If opportunely developed and optimized, aqueous solar cells can be truly considered a step forward to zero-impact photovoltaic device. Moreover, the possibility of gellyfing the electrolyte into a solid matrix can reduce the leakage outside the device, thus increasing the long-term stability. In this respect, bio-derived polymers (i.e. carboxymethyl cellulose, xanthan gum, alginate derivatives…) appear promising candidates for electrolyte stabilization, being renewable and easy available at low cost. In this contribution the use of a chemometric Experimental Design approach (DoE) in the optimization of lab-scale DSSCs will be discussed. DoE was applied to investigate the relationships between the relevant experimental parameters concerning the formulation of iodine and cobaltbased 100% aqueous electrolytes and the electrochemical and photovoltaic parameters of the resulting devices. Thanks to the statistically optimized preparation conditions and engineered formulations we were able to obtain reproducible and stable lab-scale devices based on liquid and gelled aqueous electrolytes.

A DoE approach to the formulation of aqueous-based electrolytes for Dye-Sensitized Solar Cells / Galliano, S.; Bella, F.; Giordano, F.; Boschloo, G.; Hagfeldt, A.; Viscardi, M. Grätzel G.; Gerbaldi, C.; Barolo, C.. - ELETTRONICO. - (2018), pp. O24PP-O24PP. (Intervento presentato al convegno XX Congresso Nazionale di Catalisi – XX Congresso Nazionale della Divisione di Chimica Industriale (GIC-DiChIn2018) tenutosi a Milan (Italy) nel 2-5 settembre 2018).

A DoE approach to the formulation of aqueous-based electrolytes for Dye-Sensitized Solar Cells

F. Bella;C. Gerbaldi;
2018

Abstract

In the last five years, Dye-Sensitized Solar Cells (DSSCs) based on aqueous electrolytes have attracted a lot of attention, being considered as one of the possible breakthroughs towards sustainable DSSCs. If opportunely developed and optimized, aqueous solar cells can be truly considered a step forward to zero-impact photovoltaic device. Moreover, the possibility of gellyfing the electrolyte into a solid matrix can reduce the leakage outside the device, thus increasing the long-term stability. In this respect, bio-derived polymers (i.e. carboxymethyl cellulose, xanthan gum, alginate derivatives…) appear promising candidates for electrolyte stabilization, being renewable and easy available at low cost. In this contribution the use of a chemometric Experimental Design approach (DoE) in the optimization of lab-scale DSSCs will be discussed. DoE was applied to investigate the relationships between the relevant experimental parameters concerning the formulation of iodine and cobaltbased 100% aqueous electrolytes and the electrochemical and photovoltaic parameters of the resulting devices. Thanks to the statistically optimized preparation conditions and engineered formulations we were able to obtain reproducible and stable lab-scale devices based on liquid and gelled aqueous electrolytes.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2713813
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