Figure 1: C-V scans for temperatures between 25 K and 350 K in steps of 25 K. The evolving plateau due to the emission and capture processes of the QDs is clearly visible. Above 300 K all hole states in the QD ensemble contribute to the total capacitance. The voltages at which the QDs enter and leave the depletion region can be seen in the second derivative of the C-V curves (see inset).