Figure 5.

Cyclic voltammograms for a ZnO QD film. (a) CVs at different scan rates in 0.01 M LiClO₄ acetonitrile electrolyte solution. The panel includes a peak current density versus scan rate plot on a log–log scale. (b) CVs at different scan rates in 0.01 M TMAPF₆ acetonitrile electrolyte solution. The panel includes a peak current density versus scan rate plot on a log–log scale. (c) CVs at different scan rates in 0.01 M TOABF₄ acetonitrile electrolyte solution. The panel includes a peak current density versus scan rate plot on a log–log scale. (d) CVs measured at 0.1 V/s for different electrolyte cations in a 0.1 M acetonitrile electrolyte solution. The panel includes a plot of the threshold potential versus vacuum for the different ions. By increasing the size of the electrolyte cation, charge injection occurs at lower potentials. The scans have negative direction, indicated by a black arrow, and are repeated three times for every scan rate. The slope from the insets is given by , where v stands for the scan rate and J₀ stands for current density.