Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2

Abstract Heterostructures based on two-dimensional (2D) materials have sparked wide interests in both fundamental physics and applied devices. Recently, Dirac/Weyl semimetals are emerging as capable functional materials for optoelectronic devices. However, thus far the interfacial coupling of an all...

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Autores principales:	Yujie Liu, Chuan Liu, Xiaomu Wang, Liang He, Xiangang Wan, Yongbing Xu, Yi Shi, Rong Zhang, Fengqiu Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/763fb76b3d584d7fa0211a7064b2b58a
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spelling	oai:doaj.org-article:763fb76b3d584d7fa0211a7064b2b58a2021-12-02T15:09:06ZPhotoresponsivity of an all-semimetal heterostructure based on graphene and WTe210.1038/s41598-018-29717-82045-2322https://doaj.org/article/763fb76b3d584d7fa0211a7064b2b58a2018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-29717-8https://doaj.org/toc/2045-2322Abstract Heterostructures based on two-dimensional (2D) materials have sparked wide interests in both fundamental physics and applied devices. Recently, Dirac/Weyl semimetals are emerging as capable functional materials for optoelectronic devices. However, thus far the interfacial coupling of an all-semimetal 2D heterostructure has not been investigated, and its effects on optoelectronic properties remain less well understood. Here, a heterostructure comprising of all semi-metallic constituents, namely graphene and WTe2, is fabricated. Standard photocurrent measurements on a graphene/WTe2 phototransistor reveal a pronounced photocurrent enhancement (a photoresponsivity ~8.7 A/W under 650 nm laser illumination). Transport and photocurrent mapping suggest that both photovoltaic and photothermoelectric effects contribute to the enhanced photoresponse of the hybrid system. Our results help to enrich the understanding of new and emerging device concepts based on 2D layered materials.Yujie LiuChuan LiuXiaomu WangLiang HeXiangang WanYongbing XuYi ShiRong ZhangFengqiu WangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yujie Liu Chuan Liu Xiaomu Wang Liang He Xiangang Wan Yongbing Xu Yi Shi Rong Zhang Fengqiu Wang Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2
description	Abstract Heterostructures based on two-dimensional (2D) materials have sparked wide interests in both fundamental physics and applied devices. Recently, Dirac/Weyl semimetals are emerging as capable functional materials for optoelectronic devices. However, thus far the interfacial coupling of an all-semimetal 2D heterostructure has not been investigated, and its effects on optoelectronic properties remain less well understood. Here, a heterostructure comprising of all semi-metallic constituents, namely graphene and WTe2, is fabricated. Standard photocurrent measurements on a graphene/WTe2 phototransistor reveal a pronounced photocurrent enhancement (a photoresponsivity ~8.7 A/W under 650 nm laser illumination). Transport and photocurrent mapping suggest that both photovoltaic and photothermoelectric effects contribute to the enhanced photoresponse of the hybrid system. Our results help to enrich the understanding of new and emerging device concepts based on 2D layered materials.
format	article
author	Yujie Liu Chuan Liu Xiaomu Wang Liang He Xiangang Wan Yongbing Xu Yi Shi Rong Zhang Fengqiu Wang
author_facet	Yujie Liu Chuan Liu Xiaomu Wang Liang He Xiangang Wan Yongbing Xu Yi Shi Rong Zhang Fengqiu Wang
author_sort	Yujie Liu
title	Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2
title_short	Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2
title_full	Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2
title_fullStr	Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2
title_full_unstemmed	Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2
title_sort	photoresponsivity of an all-semimetal heterostructure based on graphene and wte2
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/763fb76b3d584d7fa0211a7064b2b58a
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_version_	1718387947988844544

Photoresponsivity of an all-semimetal heterostructure based on graphene and WTe2

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