Research Article


2022, 15(2): 1532–1537


SnSe field-effect transistors with improved electrical properties

Shuai Liu, Yujia Chen, Shengxue Yang (✉), and Chengbao Jiang (✉)

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School of Materials Science and Engineering, Beihang University, Beijing 100191, China

Keywords: few-layer SnSe, anisotropy, field-effect transistors, van der Waals heterostructure, hysteresis
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Low-symmetry two-dimensional (2D) materials, with unique in-plane direction-dependent optical, electrical, and thermoelectric properties, have been intensively studied for their potential application values in advanced electronic and optoelectronic devices. However, since anisotropic 2D materials are highly sensitive to the environmental factors, researches on their high-performance field-effect transistors (FETs) are still limited. Here, we report a high-performance SnSe FET based on a van der Waals (vdWs) heterostructure of SnSe encapsulated in hexagonal boron nitride (hBN) together with graphene contacts. The device exhibits a high on/off ratio exceeding 1 × 109, and a carrier mobility of 118 cm2·V−1·s−1. Our work highlights low-symmetry 2D SnSe holds potential to be used for designing excellent electronic devices.
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SnSe field-effect transistors with improved electrical properties. Nano Res. 2022, 15(2): 1532–1537

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