High-Performance Organic Semiconductors Based on Fluorene–Phenylene Oligomers with High Ionization Potentials


  • JL thanks the Intelligence Community Postdoctoral Fellowship for financial support. ZB acknowledges partial financial support from the Finmeccanica Faculty Scholar Award, the 3M Faculty Award, the Center for Polymeric Interfaces and Macromolecular Assemblies (NSF-Center MRSEC under Award Number DMR-0213618). Supporting Information is available online from Wiley InterScience or from the author.


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A series of phenylene–fluorene derivatives (see figure) are synthesized and evaluated for use in organic field-effect transistors. Average field-effect mobilities as high as 0.32 cm2 V–1 s–1 are achieved by vacuum deposition at low substrate temperatures. The high ionization potentials in the derivatives lead to improved chemical and photostability. Transistor devices show no loss in performance when tested over a period of three months.