On the influence of anions in binary ionic liquid electrolytes for monolithic dye-sensitized solar cells
2007 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 111, no 35, 13261-13266 p.Article in journal (Refereed) Published
Five ion c liquids (ILs) of the general formula Im(+)A(-), where Im(+) = I -methyl-3-n-butyl-imidazolium, A(-) = I- (1), BF4- (2), SCN- (3), CF3CO2- (4), and CF(3)S0(3)(-) (5), were used in electrolytes for dye-sensitized monolithic solar cells. The properties of the electrolytes and various characteristics of the solar cell performance, such as electron transport and electron lifetime, were studied. The composition of the binary electrolytes, i.e., the different anions, have a significant effect on the viscosity, but only a modest effect of the measured diffusior. coefficient for triiodide. No significant effect of the electrolyte composition on the electron transport time in the mesoporous TiO2 film was found, while there was a pronounced effect on the electron lifetime. Monolithic solar cells with thiocyanate, IL 3, showed overall light-to-electricity conversion efficiency up to 5.6% in 250 W m(-2) simulated sunlight and have promising stability.
Place, publisher, year, edition, pages
2007. Vol. 111, no 35, 13261-13266 p.
Binary mixtures; Conversion efficiency; Electrolytes; Electron transport properties; Solar cells; Viscosity
IdentifiersURN: urn:nbn:se:kth:diva-7314DOI: 10.1021/jp072514rISI: 000249169900054ScopusID: 2-s2.0-34648822936OAI: oai:DiVA.org:kth-7314DiVA: diva2:12286
QC 20100708. Uppdaterad från Submitted till Published 20100708.2007-06-072007-06-072010-07-09Bibliographically approved