All van der Waals Semiconducting PtSe2 Field Effect Transistors with Low Contact Resistance Graphite Electrodes

Research output: Contribution to journalArticleResearchpeer-review

Authors

  • Shubham Tyagi
  • Alexandros Provias
  • Vadym Tkachuk
  • Egon Pavlica
  • Martina Dienstleder
  • Daniel Knez
  • Kenji Watanabe
  • Takashi Taniguchi
  • Dayu Yan
  • Youguo Shi
  • Theresia Knobloch
  • Michael Waltl
  • Udo Schwingenschlögl
  • Tibor Grasser

Organisational units

External Organisational units

  • Kind Abdullah University of Science and Technology (KAUST)
  • TU Wien
  • University of Nova Gorica
  • Zentrum f Elektronenmikroskopie Graz
  • Technische Universität Graz
  • Research Center for Functional Materials, National Institute for Materials Science
  • Chinese Academy of Sciences

Abstract

Contact resistance is a multifaceted challenge faced by the 2D materials community. Large Schottky barrier heights and gap-state pinning are active obstacles that require an integrated approach to achieve the development of high-performance electronic devices based on 2D materials. In this work, we present semiconducting PtSe2 field effect transistors with all-van-der-Waals electrode and dielectric interfaces. We use graphite contacts, which enable high ION/IOFF ratios up to 109 with currents above 100 μA μm-1 and mobilities of 50 cm2 V-1 s-1 at room temperature and over 400 cm2 V-1 s-1 at 10 K. The devices exhibit high stability with a maximum hysteresis width below 36 mV nm-1. The contact resistance at the graphite-PtSe2 interface is found to be below 700 Ω μm. Our results present PtSe2 as a promising candidate for the realization of high-performance 2D circuits built solely with 2D materials.

Details

Original languageEnglish
Pages (from-to)6529-6537
Number of pages9
JournalNano Letters
Volume24.2024
Issue number22
DOIs
Publication statusPublished - 24 May 2024