uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Tetrathiafulvalene as a one-electron iodine-free organic redox mediator in electrolytes for dye-sensitized solar cells
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Show others and affiliations
2012 (English)In: RSC Advances, ISSN 2046-2069, Vol. 2, no 3, 1083-1087 p.Article in journal (Refereed) Published
Abstract [en]

Tetrathiafulvalene (TTF) was investigated as an organic iodine-free redox mediator in electrolytes for dye-sensitized, nanocrystalline solar cells (DSCs) and was compared to the commonly used iodide/triiodide system. The TTF system studied was determined to be a one-electron transfer system, although potentially exhibiting three well-defined oxidation states. Despite the slightly positive redox potential of TTF, electrolytes with TTF displayed around 200 mV lower open-circuit voltage than the iodide/triiodide system. This can mainly be ascribed to a much shorter electron lifetime in the TiO(2) film. Mass transport limitations for redox species in TTF-based electrolytes were found to be serious. Electrochemical impedance measurements (EIS) show that the charge-transfer resistance at the counter electrode in the electrolyte with TTF is considerably larger than for the iodide/triiodide system. In addition, the light absorption of the TTF-based electrolyte is stronger than that for the iodide/triiodide system. Thus, DSCs with TTF-based electrolytes show worse photovoltaic performance than those with iodide/triiodide-based electrolytes. The differences in I-V characteristics and charge-recombination behavior have also been elucidated.

Place, publisher, year, edition, pages
2012. Vol. 2, no 3, 1083-1087 p.
National Category
Chemical Sciences
URN: urn:nbn:se:uu:diva-168744DOI: 10.1039/c1ra00877cISI: 000299177000049OAI: oai:DiVA.org:uu-168744DiVA: diva2:503680
Available from: 2012-02-16 Created: 2012-02-15 Last updated: 2014-02-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Tian, HainingBoschloo, Gerrit
By organisation
Physical Chemistry
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 461 hits
ReferencesLink to record
Permanent link

Direct link