Organic semiconductors have great potential in low cost, large area electronic applications. So far, pentacene is the workhorse of the organic thin film transistor field, with reliably high mobilities and decent on-off ratios. Tetracene has proven to be a good option for organic field effect transistors (OFETs), with mobilities as high as 1.3 cm^2/V*s. In comparison to pentacene, tetracene is more stable and soluble, properties that make it more amenable to solution-based, roll-to-roll processing. Here, we present a series of novel tetracene molecules, functionalized at the 2- and 5- positions with bromo, methyl, phenyl and carboxylic groups. We probe the effect of chemical structure on their thin film properties in FET geometry..The FET current-voltage measurements of these thin films, made by evaporation under high vacuum, will be related to their order and structure. This work sheds light on the structure-property relationships that govern the relationship between structure and thin film mobility for organic semiconductors.

Functionalized tetracene organic field effect transistors

251st National Meeting (2016)

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