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Schematic illustration of the structure of OFETs with orientated film. (a) cross section and (b) top view of the device with current direction parallel grains orientation (top) and the device with current direction perpendicular to the grains orientation (bottom).
Schematic illustration of the distribution of carriers’ density in the grains and in the grain boundaries ; illustration of effective grain size and grain boundary length .
Illustration of the degeneration factor (AFM picture of pentacene see Ref. 9). and are the directions and is the misorientation angle.
Comparison of the overall effective mobility between experiment results and simulation results. and are the effective mobility when currents parallel to and perpendicular to the aligning direction, respectively. The units of them are both . The simulating parameters of pentacene are ; ; ; ; ; ; . The simulating parameters of copper phthalocyanine are ; ; ; ; ; ; . Simulation results A are obtained through our model; simulation results B are obtained via GBTM.
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