Article Ferroelectric field effect transistors based on two-dimensional CuInP2S6 (CIPS) and graphene heterostructures

Maheera Abdul Ghani ; Soumya Sarkar ; Yang Li ; Ye Wang ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Yan Wang ; Manish Chhowalla

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Maheera Abdul Ghani, Soumya Sarkar, Yang Li, Ye Wang, Kenji Watanabe, Takashi Taniguchi, Yan Wang, Manish Chhowalla. Ferroelectric field effect transistors based on two-dimensional CuInP2S6 (CIPS) and graphene heterostructures. MRS Energy & Sustainability. 2024, 11 (2), 616-623. https://doi.org/10.1557/s43581-024-00109-y

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(abstract)

Heterostructures of two-dimensional (2D) materials comprise clean van der Waals (vdW) interfaces that can facilitate charge or energy transfer. Recently, the 2D ferroelectric ­ CuInP2S6 (CIPS) has been integrated with graphene and other 2D materials to realize potentially novel low energy electronic devices. However, the influence of 2D CIPS on the properties of graphene and doping across the vdW interface has not been studied in detail. Here, we study graphene field effect transistors (FETs) with CIPS as the top gate. We find that CIPS leads to modulation of the graphene Fermi level due to local doping. We also find polarization-induced hysteresis in CIPS-gated graphene FETs. Electrical transport measurements from 50 to300 K show that above 200 K, the ferroelectric response decreases. As a result, the hysteresis voltage windows in the graphene ferroelectric FETs (FeFET) transfer curves decrease above 200 K. Our results show that interfacial remote doping affects the macroscopic polarization and performance of CIPS-based graphene FeFETs.

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Keyword: ferroelectric field effect transistor (FeFET)
, CuInP2S6 (CIPS)
, graphene heterostructures


Date published: 2024-08-21

Publisher: Springer Science and Business Media LLC

Journal:

  • MRS Energy & Sustainability (ISSN: 23292229) vol. 11 issue. 2 p. 616-623

Funding:

  • European Research Council GA 101019828-2D-LOTTO
  • Engineering and Physical Sciences Research Council EP/T026200/1
  • Engineering and Physical Sciences Research Council EP/T001038/1
  • Japan Society for the Promotion of Science London Grant Numbers 21H05233
  • Japan Society for the Promotion of Science London 23H02052
  • Japan Society for the Promotion of Science London World Premier International Research Center Initiative (WPI)
  • Japan Society for the Promotion of Science London MEXT
  • Japan Society for the Promotion of Science London Japan.

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1557/s43581-024-00109-y

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Updated at: 2026-02-14 22:35:55 +0900

Published on MDR: 2026-02-10 18:03:06 +0900

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