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Related Experiment Videos

High electron mobility in ladder polymer field-effect transistors.

Amit Babel1, Samson A Jenekhe

  • 1Department of Chemical Engineering, University of Washington, Seattle, Washington 98195-1750, USA.

Journal of the American Chemical Society
|November 6, 2003
PubMed
Summary
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Researchers achieved high electron mobility in conjugated polymers using a ladder architecture. This breakthrough in poly(benzobisimidazobenzophenanthroline) (BBL) demonstrates efficient electron transport in organic semiconductors.

Area of Science:

  • Materials Science
  • Organic Electronics
  • Polymer Chemistry

Background:

  • Conjugated polymers are promising organic semiconductors for electronic applications.
  • Achieving high electron mobility in these materials has been a significant challenge.
  • Ladder polymer architectures offer potential for enhanced charge transport properties.

Purpose of the Study:

  • To investigate the electron transport properties of a novel conjugated ladder polymer, poly(benzobisimidazobenzophenanthroline) (BBL).
  • To compare the performance of BBL with a structurally similar nonladder polymer.
  • To demonstrate the impact of ladder architecture on charge carrier mobility in organic semiconductors.

Main Methods:

  • Fabrication of n-channel thin film transistors (TFTs) using solution spin-coating.

Related Experiment Videos

  • Utilized poly(benzobisimidazobenzophenanthroline) (BBL) as the active semiconductor layer.
  • Performed comparative studies with a nonladder polymer, BBB, under ambient air conditions.

    • Main Results:

    • Achieved a field-effect electron mobility as high as 0.1 cm2/(V s) in BBL-based TFTs.
    • This represents the highest electron mobility reported to date for a conjugated polymer semiconductor.
    • Nonladder polymer BBB exhibited significantly lower electron mobility (10-6 cm2/(V s)).

    Conclusions:

    • Ladder architecture in conjugated polymers substantially enhances charge carrier mobility.
    • Electron transport in conjugated polymer semiconductors can be as efficient as hole transport.
    • BBL is a highly promising material for advanced organic electronic devices.