**5.1.2 The pause stage**

During the pause time Δt, the stability of the amount of charges Qst is determined by the efficiency of traps associated with impurities and lattice defects as well as the charge transport properties. Then, if one wants to evaluate the extent of discharging, one has to perform, with identical conditions, a second injection over the same area as the first one for the purpose of restoring the reference steady state.
