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Crystal structure of parallel-stacked peryleneimides and their application to organic FET devices

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Organic field-effect transistors (FETs) have recently attracted attention mainly because of the low fabrication cost. Parallelstacked structure is considered favorable for realizing a high mobility along the stacked direction in organic FETs. Among our dipyridyl-peryleneimides synthesized previously for H2 sensors (OPP, MPP, and PPP), two derivatives (OPP and PPP) are found to crystallize in this structure and are expected to show better FET characteristics than MPP. Therefore, the FET characteristics have been studied in the present investigation from the standpoint of the crystal structure. The FET devices based upon OPP and PPP exhibit n-type characteristics, showing a relatively high mobility of about 10−5 cm2/Vs and “on/off” ratios of about 102; whereas only poor performance was observed for the MPP-based FET.

Document Type: Research Article

Publication date: January 1, 2007

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