Figure 6. Total light transmission (solid curves) and measured voltage (dashed curves) of an FTO/Vio/FTO cell. Top: Applied voltage is -0.9 V starting at 8 s to about 25 s, then switch off of voltage to 0 V. Bottom: Applied voltage is 0 V up to 180 s, then electrolysis at -1.5 V between ~180 s and ~200 s, then switch off of electrolysis potential back to 0 V. At the electrolysis voltage of -0.9 V in the top panel viologen neutrals cannot form; but they can in the bottom panel

From

Electrochromism of Methylviologen (Paraquat)

N. Aristov, A. Habekost

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