Optimizing Hydrogel Electrolytes for Dye-sensitized Solar Cells
Claudia Barolo a b, Federico Bella c, Simone Galliano a, Lucia Fagiolari c, Matteo Bonomo a, Gerrit Boschloo d, Michael Graetzel e, Claudio Gerbaldi c, Guido Viscardi a
a Department of Chemistry, Università degli Studi di Torino, Via Pietro Giuria 7, 10125 Torino, Italy
b ICxT Interdepartmental Center, Università degli Studi di Torino, Lungo Dora Siena 100, 10153 Torino, Italy
c Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
d Department of Chemistry, Uppsala University, Box 523, 75120 Uppsala, Sweden
e Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne, Station 3, 1015 Lausanne, Switzerland
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Roma, Italy, 2019 May 12th - 15th
Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo
Poster, Claudia Barolo, 270
Publication date: 11th February 2019

In this contribution, an investigation on bio-derived hydrogel electrolytes for dye-sensitized solar cells is proposed.

When opportunely developed and optimized, aqueous solar cells can be considered a truly low impact photovoltaic device with non-toxic components [1,2,3]. Moreover, the possibility of gelling the electrolyte into a polymeric matrix can reduce the 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 [4]. Different aqueous electrolytes gelled with carboxymethylcellulose (Na-CMC) or xanthan gum have been prepared with both I-/I3- and Co2+/3+ redox mediators. These gelled systems show good photovoltaic performances, maintaining over 90% efficiency of liquid DSSCs, as well as enhanced long-term stability.

Moreover, we demontrate the use of Experimental Designs (DoE) as a powerful chemometric technique for the concurrent investigation of a number of experimental factors that directly influence the photovoltaic performances of solar cells. Results obtained enlighten that a solid mathematical-statistical approach is fundamental to support the researchers and effectively drive the experiments towards the achievements of optimal operating conditions for aqueous solar cells 5].

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