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Piezotronics and piezo-phototronics in two-dimensional materials

Published online by Cambridge University Press:  10 December 2018

Yudong Liu
Affiliation:
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, China; liuyudong@binn.cas.cn
Erlin Tresna Nurlianti Wahyudin
Affiliation:
Department of Materials Science and Engineering, King Abdullah University of Science and Technology, Saudi Arabia; erlin.nurlianti@kaust.edu.sa
Jr-Hau He
Affiliation:
Department of Electrical Engineering, King Abdullah University of Science and Technology, Saudi Arabia; jrhau.he@kaust.edu.sa
Junyi Zhai
Affiliation:
Micro-/Nanopiezoelectric Materials and Devices Group, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, China; jyzhai@binn.cas.cn
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Abstract

This article discusses recent studies of piezotronics and piezo-phototronics of two-dimensional (2D) materials. Two-dimensional semiconductor materials have demonstrated excellent electronic and optoelectronic properties, and these ultrathin materials are candidates for next-generation devices. Among 2D semiconductors, transition-metal dichalcogenides in particular have large in-place piezoelectricity due to the noncentrosymmetry along the armchair direction. A strong coupling of piezoelectric and semiconducting properties has been reported for Schottky contacts and pn junctions, even in single-layer materials. Since the carrier concentration of ultrathin 2D materials can be easily modulated by external piezocharges, layered composites of ferroelectric/2D materials also show promising piezotronic and piezo-phototronic properties.

Type
Piezotronics and Piezo-Phototronics
Copyright
Copyright © Materials Research Society 2018 

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