Advanced Science (Dec 2023)

Landauer‐QFLPS Model for Mixed Schottky‐Ohmic Contact Two‐Dimensional Transistors

  • Zhao‐Yi Yan,
  • Zhan Hou,
  • Kan‐Hao Xue,
  • He Tian,
  • Tian Lu,
  • Junying Xue,
  • Fan Wu,
  • Ruiting Zhao,
  • Minghao Shao,
  • Jianlan Yan,
  • Anzhi Yan,
  • Zhenze Wang,
  • Penghui Shen,
  • Mingyue Zhao,
  • Xiangshui Miao,
  • Zhaoyang Lin,
  • Houfang Liu,
  • Yi Yang,
  • Tian‐Ling Ren

DOI
https://doi.org/10.1002/advs.202303734
Journal volume & issue
Vol. 10, no. 34
pp. n/a – n/a

Abstract

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Abstract Two‐dimensional material‐based field‐effect transistors (2DM‐FETs) are playing a revolutionary role in electronic devices. However, before electronic design automation (EDA) for 2DM‐FETs can be achieved, it remains necessary to determine how to incorporate contact transports into model. Reported methods compromise between physical intelligibility and model compactness due to the heterojunction nature. To address this, quasi‐Fermi‐level phase space theory (QFLPS) is generalized to incorporate contact transports using the Landauer formula. It turns out that the Landauer‐QFLPS model effectively overcomes the issue of concern. The proposed new formula can describe 2DM‐FETs with Schottky or Ohmic contacts with superior accuracy and efficiency over previous methods, especially when describing non‐monotonic drain conductance characteristics. A three‐bit threshold inverter quantizer (TIQ) circuit is fabricated using ambipolar black phosphorus and it is demonstrated that the model accurately predicts circuit performance. The model could be very effective and valuable in the development of 2DM‐FET‐based integrated circuits.

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