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Electrolytes for dye-sensitized solar cells based on interhalogen ionic salts and liquids
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
2007 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 46, no 9, 3566-3575 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we report on the preparation of interhalogen ionic liquids of the general formula [K+]XY2-, where K+ = 1,3-dialkylimidazolium, 1,2,3-trialkylimidazolium, or N-alkylpyridinium; XY2- = IBr2- or I2Br-. These compounds were characterized in solution and the solid state by NMR, IR, Raman, and mass spectroscopy. The crystal structure of the compound [Me(2)BuIm]IBr2 (7) shows that the IBr2- anion has a linear Br-I-Br structure. Indications of an equilibrium between different forms of XY2- anions in solution are observed. Interhalogen ionic salts and liquids were used as electrolyte components for encapsulated monolithic dye-sensitized solar cells. Overall light-to-electricity conversion efficiencies up to 6.4%, 5.0%, and 2.4% at 1000 W/m(2) were achieved by using electrolytes based on interhalogen ionic salts and gamma-butyrolactone, glutaronitrile, or native ionic liquids as solvents, respectively. Moreover, in terms of stability, the cell performance lost 9-14% of the initial performance after 1000 h illumination at 350 W/m(2).

Place, publisher, year, edition, pages
2007. Vol. 46, no 9, 3566-3575 p.
Keyword [en]
polymer gel electrolyte, photoelectrochemical cells, molten, polyiodides, conversion, efficiency, halogens, crystal, iodides, power
Identifiers
URN: urn:nbn:se:kth:diva-16571DOI: 10.1021/ic062244bISI: 000245871700020Scopus ID: 2-s2.0-34248361610OAI: oai:DiVA.org:kth-16571DiVA: diva2:334613
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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