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Bis(1,1-bis(2-pyridyl)ethane)copper(I/II) as an efficient redox couple for liquid dye-sensitized solar cells
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden; Dyenamo AB, Sweden.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
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2016 (English)In: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 4, no 38, p. 14550-14554Article in journal (Refereed) Published
Abstract [en]

A new redox couple, [Cu(bpye)2]+/2+, has been synthesized, and applied in dye-sensitized solar cells (DSSCs). Overall efficiencies of 9.0% at 1 sun and 9.9% at 0.5 sun were obtained, which are considerably higher than those obtained for cells containing the reference redox couple, [Co(bpy)3]2+/3+. These results represent a record for copper-based complex redox systems in liquid DSSCs. Fast dye regeneration, sluggish recombination loss processes, faster electron self-exchange reactions and suitable redox potentials are the main reasons for the observed increase in efficiency. In particular, the main disadvantage of cobalt complex-based redox couples, charge-transport problems, appears to be resolved by a change to copper complex redox couples. The results make copper complex-based redox couples very promising for further development of highly efficient DSSCs.

Place, publisher, year, edition, pages
2016. Vol. 4, no 38, p. 14550-14554
National Category
Materials Chemistry
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URN: urn:nbn:se:ri:diva-13638DOI: 10.1039/C6TA06782DOAI: oai:DiVA.org:ri-13638DiVA, id: diva2:1033956
Available from: 2016-10-10 Created: 2016-10-10 Last updated: 2019-06-12Bibliographically approved

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