Field-effect transistors made from solution-grown two-dimensional tellurene

Abstract

The reliable production of two-dimensional crystals is essential for the development of new technologies based on 2D materials. However, current synthesis methods suffer from a variety of drawbacks, including limitations in crystal size and stability. Here, we report the fabrication of large-area, high-quality 2D tellurium (tellurene) using a substrate-free solution process. Our approach can create crystals with a process-tunable thickness, from monolayer to tens of nanometres, and with lateral sizes of up to 100 um. The chiral-chain van der Waals structure of tellurene gives rise to strong in-plane anisotropic properties and large thickness dependent shifts in Raman vibrational modes, which is not observed in other 2D layered materials. We also fabricate tellurene field-effect transistors, which exhibit air-stable performance at room temperature for over two months, on off ratios on the order of 106 and field-effect mobilities of around 700 cm2 per Vs. Furthermore, by scaling down the channel length and integrating with high-k dielectrics, transistors with a significant on-state current density of 1 A mm-1 are demonstrated.

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• Toward improved property prediction of 2D materials using many-body quantum Monte Carlo methods
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• Signatures of a Spin-Active Interface and Locally Enhanced Zeeman field in a Superconductor-Chiral Material Heterostructure
• Evidence of a two-dimensional nitrogen crystalline structure on silver surfaces
• Honeycomb lattice in metal-rich chalcogenide Fe2Te
• Light-programmable reorientation of the crystallographic c-axis of Tellurium thin films
• Optical Anisotropy in Tellurene and its Janus Allotropes -- A first principle Study
• van der Waals Nanoreactors
• Optoelectronic characteristics and application of black phosphorus and its analogs
• Two ultra-stable novel allotropes of Tellurium few-layers
• Bilayer Quantum Hall States in an n-type Wide Tellurium Quantum Well
• Growth and Strain Engineering of Trigonal Te for Topological Quantum Phases in Non-Symmorphic Chiral Crystals