Microscopic Evidence for Spatially Inhomogeneous Charge Trapping in Pentacene.

Muller, E M; Marohn, J A · Adv Mater · 2005

basic_science · Level V

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Abstract

Charge traps in pentacene thin-film transistors (Figure, left) have been imaged using electric force microscopy. The Figure shows a map of the trap distribution just below (middle) and well above (right) the transistor threshold voltage. It is found that the long-lived charge traps in polycrystalline pentacene are distributed inhomogeneously and do not appear to be associated with grain boundaries, as is generally assumed.