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Efficient aqueous dye-sensitized solar cell electrolytes based on a TEMPO/TEMPO+ redox couple
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
2015 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 5, no 34, 26706-26709 p.Article in journal (Refereed) Published
Abstract [en]

Aqueous electrolyte-based dye-sensitized solar cells (DSSCs) have recently emerged and shown to be a promising eco-friendly photovoltaic device. In the present study, we, for the first time, have developed 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and TEMPO+ tetrafluoroborate salt as a redox couple in an aqueous electrolyte for DSSCs. With the hydrophobic dye LEG4 as a light absorber, we have achieved a power conversion efficiency of 4.3% and a record open circuit voltage of 955 mV in the device. This is attributed to the high formal redox potential of TEMPO/TEMPO+ (0.71 V vs. NHE) in water. In addition, despite the wide use of surfactants in previous studies, we have clearly shown that the addition of surfactants to the electrolyte is detrimental to solar cell performance. Therefore, the use of surfactants in aqueous DSSC electrolytes should be avoided or used with caution.

Place, publisher, year, edition, pages
2015. Vol. 5, no 34, 26706-26709 p.
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-252057DOI: 10.1039/c5ra03248bISI: 000351556800031OAI: oai:DiVA.org:uu-252057DiVA: diva2:808704
Available from: 2015-04-29 Created: 2015-04-28 Last updated: 2017-12-04Bibliographically approved

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Yang, WenxingEriksson, Anna I. K.Boschloo, Gerrit

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