2.7. Electrolyte Composition
Iodide/triiodide (I/I3
) electrolyte was prepared with 0.5 M
tetrabutylammonium iodide and 0.05 M iodine (I2) in 3-methox-
ypropionitrile. The ferrocene/ferrocenium (Fc/Fc+) electrolyte
contained 0.1 M ferrocene and 0.05 M ferrocenium hexafluorophosphate
in 3-methoxypropionitrile and was deoxygenated by
bubbling nitrogen for 10 minutes prior to cell fabrication to
minimize reaction of ferreocene with oxygen [5,31]. Additives such
as 4-tert-butylpyridine were avoided to minimize complications
arising from band-edge energy shifts.