Fig. 2: 3D contour plots of the energy landscape for F8ZnPc for increasing doping concentration.
From: Critical charge transport networks in doped organic semiconductors
Blue/orange structures are regions with negative/positive potential for charge carriers, respectively (exemplary colorbar for 32%). See Supplementary Note 1 for parameter information. Upon increasing the concentration, there is a transition from rather isolated potential hills and valleys to large, fluctuating structures. Thus, at low concentrations, the spatial correlations of the site energies are stronger than at high concentrations. This transition is accompanied by a transition in the critical charge transport paths, i.e. from long-range hopping between the separated wells to hopping on all length scales through the fluctuating landscape (see Fig. 3c).
