Organic and Carbon-based Thin-film Transistors on Flexible Substrates.

ORAL

Abstract

Fabrication of organic {\&} carbon-based thin-film transistors (TFT) was achieved on plastic substrates using transfer printing. Each device component (Au electrodes, polymer dielectric layer and semiconductor layer) was printed using only pressure and temperature, eliminating all chemical processing on the device substrate. Pentacene (Pn), poly(3-hexylthiophene) (P3HT), carbon nanotube mats (CNTM) and graphene TFTs were all fabricated on polyethylene terephthalate (PET) substrates, yielding mobilities of 0.237 cm$^{2}$/Vs for Pn and 0.04 cm$^{2}$/Vs for P3HT. Bottom-gate CNTM TFTs are p-type, with mobilities of 13.7 cm$^{2}$/Vs, on/off ratio of 10$^{3}$ and minimal hysteresis. Top-gate graphene TFTs have mobilities of 1.0x10$^{4}$ cm$^{2}$/Vs for holes and 4x10$^{3}$ cm$^{2}$/Vs for electrons. P3HT TFTs showed little variation in mobility, but strong variation in threshold voltage for different dielectric layers. These TFTs printed onto plastic substrates with a variety of polymer dielectric layers will be presented and discussed..

*Supported by the Laboratory for Physical Sciences and the UMD-NSF MRSEC

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Authors

  • D.R. Hines

    • Dept. of Physics, University of Maryland, College Park, MD
    • Laboratory of Physical Sciences at the University of Maryland
    • University of Maryland

  • Adrian Southard

    • Department of Physics and Center for Nanoscience and Applied Materials, University of Maryland, College Park, MD 20742, USA
    • Dept. of Physics, University of Maryland, College Park, MD
    • Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA

  • Jianhao Chen

    • Dept. of Physics, University of Maryland, College Park, MD
    • University of Maryland
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Michael Fuhrer

    • University of Maryland
    • Dept. of Physics, University of Maryland, College Park, MD
    • Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA
    • Mater. Res. Sci. and Eng. Ctr., Ctr. for Nanophys. and Adv. Mater., and Dept. of Phys., Univ. of MD, College Park, MD 20742
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Ellen Williams

    • Department of Physics \& MRSEC, University of Maryland, College Park
    • Dept. of Physics, University of Maryland, College Park, MD
    • Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA
    • U. of Maryland, College Park
    • University of Maryland
    • University of Maryland, College Park
    • University of Maryland - College Park
    • Department of Physics and Materials Research Science and Engineering Center, University of Maryland, College Park, MD 20742