Abstract
ABSTRACTWhen a pentacene OTFT is fabricated with a bottom gate structure, the top-contact configuration of gold electrodes is preferred because it results in better electrical performance than the bottom-contact configuration. Pentacene molecules are deposited only on the SiO2 dielectric layer in the top-contact configuration, and thus all pentacene molecules form a vertical orientation that induces efficient charge transport between molecules. However, in an OTFT device with the bottom-contact configuration, pentacene molecules adopt a random tilted orientation at the boundary of the gold electrode, resulting in poor charge transport between molecules.
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