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Schematics of the OFET geometry (channel width ; channel length ).
(Color online) AFM micrographs of pentacene films, SuMBE grown at three kinetic energies. (a) , film thickness ; (b) , film thickness ; and (c) , film thickness . In each figure, the inset shows the height profile along the lines drawn on the micrographs, selected as broken curve paths to give information about both the typical morphology of the grains and the peak-to-peak variation.
OFETs output characteristics for SuMBE grown films at three : (a) ; (b) ; and (c) . For all devices, and .
Field-effect mobility as a function of temperature. ● polycrystalline film grown by SuMBE at lower than . ∎ films grown at kinetic energy higher than .
Characteristic parameters of the devices as a function of .
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