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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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Low-Power Complementary Logic Circuit Using Polymer-Electrolyte-Gated Graphene Switching Devices.

Myungwoo Son1, Hanggyu Kim, Jaewon Jang

  • 1Photonic Energy Research Center , Korea Photonics Technology Institute (KOPTI) , Cheomdanbencheo-ro 108 beon-gil 9 , Buk-gu, Gwangju 61007 , Republic of Korea.

ACS Applied Materials & Interfaces
|November 21, 2019
PubMed
Summary

Researchers achieved unipolar graphene field-effect transistors (GFETs) using polymer electrolytes for low-power logic electronics. This breakthrough enables efficient, low-voltage graphene-based devices.

Keywords:
chemical dopinggraphene field-effect transistorslogic inverterslow-power consumptionpolymer electrolyte

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Area of Science:

  • Materials Science
  • Electronics Engineering
  • Nanotechnology

Background:

  • Graphene's electrical properties are crucial for low-power logic electronics.
  • Developing stable and efficient graphene devices requires precise control over charge transport.

Purpose of the Study:

  • To demonstrate the transformation of graphene's charge transport from ambipolar to unipolar using polymer electrolyte doping.
  • To fabricate low-power, high-performance graphene-based logic devices.

Main Methods:

  • Surface charge transfer doping of graphene using polymer electrolytes like poly(acrylic acid) (PAA) for p-type and poly(ethyleneimine) (PEI) for n-type.
  • Utilizing lithium perchlorate (LiClO4) in a polymer matrix for high gating efficiency and low-gate voltage operation (< ±3 V).
  • Fabricating complementary graphene inverters using polymer-electrolyte-gated GFETs.

Main Results:

  • Achieved unipolar charge transport in graphene field-effect transistors (GFETs) via surface doping.
  • Demonstrated low-gate voltage operation (< ±3 V) due to high gating efficiency of LiClO4-polymer electrolyte.
  • Fabricated complementary graphene inverters with a 57% voltage swing and a maximum voltage gain (Vgain) of 1.1 at a low supply voltage (VDD = 1 V).

Conclusions:

  • Polymer-electrolyte gating effectively modulates graphene's electrical properties for unipolar behavior.
  • The developed GFETs and inverters show promise for low-cost, low-power, and flexible graphene-based logic electronics.
  • This approach facilitates the advancement of next-generation electronic devices.