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Updated: May 28, 2026

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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Thermofield Effects in Graphite-like Amorphous Carbon Films with Nanoscale Structure.

Ekaterina N Muratova1, Igor A Vrublevsky2, Vyacheslav A Moshnikov1

  • 1Microelectronics Department, Saint Petersburg Electrotechnical University "LETI", Professora Popova St., 5, 197022 Saint Petersburg, Russia.

Materials (Basel, Switzerland)
|May 27, 2026
PubMed
Summary

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This summary is machine-generated.

This study investigates graphite-like amorphous carbon films, revealing temperature-dependent charge transport mechanisms. Electrical properties were analyzed, showing transitions in conductivity and Schottky barrier behavior with increasing temperature.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Graphite-like amorphous carbon films possess unique electrical properties.
  • Understanding charge transport mechanisms is crucial for electronic device applications.

Purpose of the Study:

  • To investigate the structure and electrical properties of graphite-like amorphous carbon films.
  • To analyze current-voltage characteristics and determine charge transport mechanisms across various temperatures.
  • To calculate Schottky barrier height at the carbon film-nickel interface.

Main Methods:

  • Electron-beam evaporation for film deposition.
  • Vacuum heat treatment.
  • Analysis of current-voltage (I-V) characteristics in weak and strong electric fields.
Keywords:
Poole–Frenkel effectSchottky barrieramorphous carboncurrent–voltage characteristicsgraphite nanoclustersgraphite-like carbon filmshopping conductivity mechanismspace-charge-limited currentthermionic emissiontunneling

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Last Updated: May 28, 2026

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  • Temperature-dependent electrical measurements from 25 °C to 155 °C.
  • Schottky barrier height calculation.

    • Main Results:

    • Identified distinct charge transport mechanisms: direct tunneling (25-45 °C, φb=0.055 eV), thermally assisted tunneling (55-75 °C, φb=0.076 eV), and thermionic emission (>85 °C, φb=0.3 eV).
    • Established hopping conductivity mechanisms via localized states, influenced by Fermi level and band tail states.
    • Observed increased conductivity in strong electric fields attributed to the Poole-Frenkel effect.

    Conclusions:

    • The electrical properties of graphite-like amorphous carbon films are strongly temperature-dependent.
    • Charge transport is governed by tunneling and thermionic emission through the Schottky barrier, with specific temperature regimes.
    • Hopping conductivity mechanisms and the Poole-Frenkel effect play significant roles in the overall conductivity of these films.