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Posted on July 1, 2014 by  & 

Transistors with organic thin-film of alkyl-substituted picene

The research group in Okayama University Graduate School of Natural Science and Technology has developed an efficient synthesis route of picene with alkyl groups (3,10-ditetradecylpicene, picene-(C14H29)2). They also fabricated field-effect transistors (FETs) with a thin film of the compound by using either a thermal deposition or a deposition from solution. The FETs showed high performance characteristics.
Field-effect transistors (FETs) fabricated with organic molecules have desirable characteristics such as mechanical flexibility, low cost, large area coverage, and light weight, so they are expected to be part of the next generation of electronic devices. However, field effect mobility of FETs with organic molecules, one of the transistor performance indices, are lower than that of those with inorganic materials.
In this study, the field-effect mobility, μ, in a picene-(C14H29)2 thin film FET reached ~21cm2 V−1 s−1, which is the highest μ value recorded for organic thin-film FETs. PZT (PbZr0.52Ti0.48O3) was used as a dielectric insulator.
This study has shown that using phenacene-type molecules in transistors would be a promising solution to lead next generation devices such as flexible displays and flexible IC tags.
Source and top image: Okayama University
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