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High-performance solution-processable N-shaped organic semiconducting materials with stabilized crystal phase.

Chikahiko Mitsui1, Toshihiro Okamoto, Masakazu Yamagishi

  • 1Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan.

Advanced Materials (Deerfield Beach, Fla.)
|May 10, 2014
PubMed
Summary

New N-shaped organic semiconductors were synthesized. These materials show excellent properties for p-type transistors, including high stability and mobility.

Keywords:
Hall effecthigh mobilityorganic semiconductorssolution-crystallized filmstabilized crystal phase

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Semiconductor Physics

Background:

  • Organic semiconductors are crucial for developing advanced electronic devices.
  • Efficient p-type organic semiconductors with high performance and stability are in demand.
  • Controlling molecular structure is key to optimizing semiconductor properties.

Purpose of the Study:

  • To synthesize novel N-shaped organic semiconductors.
  • To evaluate their suitability for p-type organic field-effect transistors (OFETs).
  • To characterize their electronic and thermal properties.

Main Methods:

  • A four-step synthesis route was employed using accessible starting materials.
  • Solution crystallization techniques were used to fabricate field-effect transistors.
  • Ionization potential, thermal stability, and carrier mobility were measured.

Main Results:

  • The synthesized N-shaped organic semiconductors possess favorable ionization potentials for p-type operation.
  • A thermally stable crystalline phase was observed above 200 °C.
  • High carrier mobility was achieved, reaching up to 16 cm(2) V(-1) s(-1) (12.1 cm(2) V(-1) s(-1) on average).
  • Small threshold voltages were recorded in the fabricated transistors.

Conclusions:

  • The developed N-shaped organic semiconductors offer promising performance for p-type OFET applications.
  • Their high thermal stability and carrier mobility make them attractive for robust electronic devices.
  • The synthesis strategy provides a viable route to high-performance organic semiconductor materials.