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Related Experiment Video

Updated: May 3, 2026

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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High-mobility field-effect transistors fabricated with macroscopic aligned semiconducting polymers.

Hsin-Rong Tseng1, Hung Phan, Chan Luo

  • 1Center for Polymer and Organic Solids, Mitsubishi Chemical Center for Advanced Materials, University of California, Santa Barbara, Santa Barbara, CA, 93106, United States.

Advanced Materials (Deerfield Beach, Fla.)
|February 8, 2014
PubMed
Summary

Record-breaking organic field-effect transistor (OFET) hole mobility was achieved in aligned semiconducting polymers. This high performance is independent of polymer molecular weight, enabling efficient charge transport.

Keywords:
conjugated polymerfiber alignmenthigh mobilityintrachain charge transportorganic field-effect transistor

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Semiconductor Physics

Background:

  • Organic field-effect transistors (OFETs) are crucial for flexible electronics.
  • Achieving high charge carrier mobility in OFETs is a key challenge.
  • Polymer alignment is explored to enhance charge transport properties.

Purpose of the Study:

  • To achieve record-high hole mobility in organic field-effect transistors.
  • To investigate the effect of polymer alignment on charge transport.
  • To determine the influence of polymer molecular weight on mobility.

Main Methods:

  • Fabrication of macroscopic aligned semiconducting polymer films.
  • Measurement of OFET device performance, specifically hole mobility.
  • Analysis of polymer chain alignment and its correlation with device characteristics.

Main Results:

  • A record hole mobility of 23.7 cm²/Vs was achieved in aligned semiconducting polymers.
  • The high mobility was found to be insensitive to variations in polymer molecular weight.
  • Polymer chain alignment along the fiber direction was confirmed to facilitate intrachain charge transport.

Conclusions:

  • Macroscopic alignment of semiconducting polymers enables record OFET hole mobility.
  • Molecular weight is not a critical factor for high mobility in this aligned system.
  • Intrachain charge transport is significantly enhanced by aligned polymer chains.