Figure 6.

Electrical properties of large-area devices. Field-effect mobility as a function of channel length. Values are extracted from two-contact measurements performed on the device based on the continuous film shown in the inset with Au leads labeled 1–6. Red symbols correspond to values obtained using two nearest neighbor electrodes as source and drain terminals with the longest segment between electrodes 5 and 6 having a length of 39.7 μm. Black symbols denote values extracted by using other combinations of electrodes with the longest segment between terminals 1 and 6 having a length of 81.2 μm.