Unveiling iodine-based electrolytes chemistry in aqueous dye-sensitized solar cells

Chemical Science
Federico BellaClaudio Gerbaldi

Abstract

Aqueous dye-sensitized solar cells (DSSCs) have recently emerged as promising systems, which can combine low cost and environmental compatibility with appreciable efficiency, long-term durability and enhanced safety. In the present study, we thoroughly investigate the chemistry behind the iodide/triiodide-based redox mediator, which presents - in a completely aqueous environment - several differences when compared to the behavior observed in the conventionally used organic solvents. The speciation of ions, the effect of the concentration of the redox mediator and the type of counter-ion are characterized from the electrochemical, spectroscopic, photovoltaic and analytical viewpoints. Furthermore, we demonstrate that aqueous DSSCs, often assumed as unstable, hold the potential to assure unparalleled stability after five months of aging without any addition of stabilizers or gelling agents, thus envisaging the construction of eco-friendly photovoltaic devices free of expensive, flammable and toxic solvents.

References

Oct 23, 2009·Accounts of Chemical Research·Gerrit Boschloo, Anders Hagfeldt
Sep 14, 2010·Chemical Reviews·Anders HagfeldtHenrik Pettersson
Jul 6, 2014·Physical Chemistry Chemical Physics : PCCP·C KoenigsmannC A Schmuttenmaer
Aug 15, 2014·Physical Chemistry Chemical Physics : PCCP·V LeandriA Hagfeldt
Apr 14, 2015·Chemical Society Reviews·Federico BellaMichael Grätzel
Aug 21, 2015·Chemical Communications : Chem Comm·Peng LiuLars Kloo

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Citations

Aug 6, 2020·Chemistry, an Asian Journal·Josue Valdés-GarcíaAlejandro Dorazco-González
May 2, 2018·Physical Chemistry Chemical Physics : PCCP·Giuseppe CassoneFranz Saija
Aug 26, 2017·Chemical Society Reviews·Jihuai WuYuelin Wei
Jun 27, 2019·Materials·Haider IftikharPeter David Lund
Mar 7, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Matteo SavastanoManuel Melguizo
Jan 27, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Matteo Savastano
Aug 5, 2017·ACS Applied Materials & Interfaces·Zhe YinYingying Zhang
Apr 21, 2017·ACS Applied Materials & Interfaces·Wenjun WuWei-Hong Zhu

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MATLAB

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