Self-Driven Photodetector and Ambipolar Transistor in Atomically Thin GaTe-MoS2 p-n vdW Heterostructure

ACS Applied Materials & Interfaces
Shengxue YangSefaattin Tongay

Abstract

Heterostructure engineering of atomically thin two-dimensional materials offers an exciting opportunity to fabricate atomically sharp interfaces for highly tunable electronic and optoelectronic devices. Here, we demonstrate abrupt interface between two completely dissimilar material systems, i.e, GaTe-MoS2 p-n heterojunction transistors, where the resulting device possesses unique electronic properties and self-driven photoelectric characteristics. Fabricated heterostructure transistors exhibit forward biased rectifying behavior where the transport is ambipolar with both electron and hole carriers contributing to the overall transport. Under illumination, photoexcited electron-hole pairs are readily separated by large built-in potential formed at the GaTe-MoS2 interface efficiently generating self-driven photocurrent within <10 ms. Overall results suggest that abrupt interfaces between vastly different material systems with different crystal symmetries still allow efficient charge transfer mechanisms at the interface and are attractive for photoswitch, photodetector, and photovoltaic applications because of large built-in potential at the interface.

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Citations

Jul 21, 2016·ACS Applied Materials & Interfaces·Zhaoqiang ZhengGuowei Yang
Jun 29, 2016·ACS Applied Materials & Interfaces·Changyong LanYong Liu
Oct 11, 2016·ACS Applied Materials & Interfaces·Min Su KimJeongyong Kim
Oct 11, 2017·Small·Wei TianLiang Li
Mar 1, 2018·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Morasae SamadiAlireza Z Moshfegh
Oct 18, 2019·Nature Communications·Ki Seok KimGeun Young Yeom
Oct 24, 2020·The Journal of Chemical Physics·Daniel WinesCan Ataca
Jul 14, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Manish K Niranjan, Arghya Ghosh
Nov 14, 2019·ACS Omega·Elisha MercadoMartin Kuball
Mar 12, 2020·ACS Applied Materials & Interfaces·Ye XinRuibin Liu
Aug 28, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Eunkwang Lee, Hocheon Yoo
Nov 17, 2021·ACS Applied Materials & Interfaces·Shuai GuoRuibin Liu

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