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Multi- and All-Acceptor Polymers for High-Performance n-Type Polymer Field Effect Transistors.

Ganapathi Bharathi1, Seongin Hong1,2

  • 1Department of Physics and Semiconductor Science, Gachon University, Seongnam 13120, Republic of Korea.

Polymers
|January 10, 2026
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Summary
This summary is machine-generated.

Multi-acceptor polymers enable stable, unipolar electron transport in n-type field-effect transistors. Optimized molecular design and processing achieve high electron mobility and long-term operation.

Keywords:
electron mobilityfrontier molecular orbitalsmulti-acceptor strategyn-type polymerspolymer field effect transistors

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Area of Science:

  • Organic electronics
  • Materials science

Background:

  • Achieving stable unipolar electron transport in n-type polymer field-effect transistors (PFETs) is a significant challenge.
  • Traditional polymer designs often compromise stability for electron mobility.

Purpose of the Study:

  • To review molecular architectures for unipolar electron transport in n-type PFETs.
  • To correlate molecular design with device performance and stability.
  • To identify key strategies for optimizing PFETs.

Main Methods:

  • Systematic replacement of electron-rich donor units with acceptor units in polymer backbones.
  • Analysis of the relationship between molecular structure, energy levels (LUMO/HOMO), and charge transport properties.
  • Investigation of interface engineering, contact resistance, and processing effects on device performance.

Main Results:

  • Multi-acceptor and all-acceptor polymers achieve LUMO levels below -4.0 eV and HOMO levels below -5.7 eV.
  • Electron mobilities exceeding 7 cm2 V-1 s-1 and on/off ratios near 107 are attainable.
  • Short-range π-aggregation (5-10 molecules) is identified as crucial for charge transport in rigid backbones, rather than extensive crystallinity.

Conclusions:

  • Molecular design, particularly the use of multi-acceptor/all-acceptor architectures, is key to high-performance, stable n-type PFETs.
  • Interface engineering and processing optimization are critical for realizing the full potential of these materials.
  • Future research should focus on balancing operating voltage and stability, improving synthetic scalability, and reducing contact resistance for applications in circuits, thermoelectrics, and bioelectronics.