Melt-Processing of Conjugated Liquid Crystals: A Simple Route to Fabricate OFETs


  • The authors would like to acknowledge Avecia Ltd., EPSRC and the UK DTI for financial support, Dr. Raoul Schroeder, Dr. Leszek Majewski, and Dr. Martin Grell for helpful discussions, Dr. Madeleine Helliwell for X-ray crystallography and Prof. John Goodby for assistance with mesophase determination. Supporting Information is available online from Wiley InterScience or from the author.


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Melt-processing of 5,5′-bis(4-hexylphenyl)-2,2′-bithiophene leads to a favorable morphology of the conjugated liquid crystal in the channel of an OFET (see figure) and a fivefold improvement of the mobility over that found for conventional devices fabricated by evaporation. This process does not require solvents or vacuum-deposition processes.