Organic field effect transistor fabricated by directly grown poly (3 hexylthiophene) crystalline nanowires on solution processed carbon nanotube aligned array electrodes

ORAL

Abstract

We demonstrate convenient and highly reproducible approach to fabricate organic field effect transistors (OFETs) using the direct growth of crystalline P3HT nanowires on aligned array SWNT interdigitated electrodes. Compared to the OFETs with metal electrodes, the OFETs with SWNT electrodes show high mobility and high current on-off ratio with a maximum of 0.13 cm$^{2}$/Vs and 3.1$\times $10$^{5}$, respectively. The improved device characteristics are also demonstrated by the absence of short channel effect which is dominant in gold electrode OFETs. Such remarkable improvement of the device performance as high mobility, high current on-off ratio, absence of short channel effect and better charge carrier injection can be attributed to the improved contact via strong \textit{$\pi -\pi $} interaction SWNT electrodes with the crystalline P3HT nanowires as well as the improved morphology of P3HT due to one dimensional crystalline structure. .

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Authors

  • Biddut Sarker

    Nanoscience Technology Center, Department of Physics, University of Central Florida, Orlando, FL 32826

  • Jianhua Liu

    Nanoscience Technology Center, Department of Chemistry, University of Central Florida, Orlando, FL 32826

  • Lei Zhai

    Nanoscience Technology Center, Department of Chemistry, University of Central Florida, Orlando, FL 32826

  • Saiful Khondaker

    Nanoscience Technology Center, Department of Physics, and School of Electrical Engineering and Computer Science, University of Central Florida, Nanoscience Technology Center, Department of Physics, Department of Chemistry, University of Central Florida, Orlando, Florida 32826, University of Central Florida, NanoScience Technology Center and Department of Physics, University of Central Florida, 12424 Research Parkway, Orlando, 32826, USA., Nanoscience Technology Center and Department of Physics, University of Central Florida, Orlando, Florida, 32826, Nanoscience Technology Center, Department of Physics, University of Central Florida, Orlando, Florida 32826