Coordinative interactions in a dye-sensitized solar cell
2004 (English)In: Journal of Photochemistry and Photobiology A: Chemistry, no 164, 23-27 p.Article in journal (Refereed) Published
Resonance Raman scattering studies of a complete dye-sensitized solar cell (DSC) including iodine and lithium iodide in the electrolyte indicate that triiodide (I3-) exchange the SCN- ligand of the dye bis(tetrabutylammonium) cis-bis(thiocyanato)bis(2,2'-bipyridine-4-carboxylic acid, 4'-carboxylate)ruthenium(II). The choice of cation in the iodide salt influenced the ligand stability of the dye. It was proposed that an ion pair Li+...I3- formation occurred which by a reduced electrostatic repulsion between I3- and SCN- facilitated the exchange of these anions at Ru(II) of the dye. The additive 1-methylbenzimidazole (MBI) suppressed the SCN /Ij ligand exchange by forming a complex with Li+. The concentrations of Li+ and MBI have to be carefully balanced due to the SCN ligand exchange with the use of characterization methods with which complete devices can be studied is necessary.
Place, publisher, year, edition, pages
2004. no 164, 23-27 p.
Dye-sensitized solar cell, Raman scattering, Ligand exchange, Mesoporous, nanostructured
IdentifiersURN: urn:nbn:se:uu:diva-66772OAI: oai:DiVA.org:uu-66772DiVA: diva2:94683