Tuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructure
van der Waals (vdW) heterostructures constructed by stacking different two dimensional layered materials are extensively utilized in designing novel optoelectronic devices, such as photodetectors and light-emitting diodes. However, the performance of vertical heterostructures is impeded by challenge...
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Online Access: | http://dx.doi.org/10.1063/1.5087091 |
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doaj-9d6b2bcb79eb43e4a624c5c7acbd9aba2020-11-25T01:12:20ZengAIP Publishing LLCAPL Materials2166-532X2019-04-0174041108041108-510.1063/1.5087091004904APMTuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructureZhangting Wu0Nianchuang Zhu1Jie Jiang2Amina Zafar3Jintao Hong4Yang Zhang5Lab for Nanoelectronics and NanoDevices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou 310018, ChinaSchool of Physics, Southeast University, Nanjing 211189, ChinaSchool of Physics, Southeast University, Nanjing 211189, ChinaSchool of Physics, Southeast University, Nanjing 211189, ChinaLab for Nanoelectronics and NanoDevices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou 310018, ChinaLab for Nanoelectronics and NanoDevices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou 310018, Chinavan der Waals (vdW) heterostructures constructed by stacking different two dimensional layered materials are extensively utilized in designing novel optoelectronic devices, such as photodetectors and light-emitting diodes. However, the performance of vertical heterostructures is impeded by challenges in effectively achieving interlayer coupling. Here, the systematic demonstration of vertical MoTe2/WS2 vdW heterostructures assembled by a mechanical transfer technique is reported, whereas the interlayer interaction is tuned from weak coupling to strong coupling by laser irradiation. Thereafter, the improved interlayer interaction of heterostructures is characterized by photoluminescence spectroscopy and further confirmed by electrical transport. Moreover, visible-infrared broadband photoresponse is achieved in the vertical stacking with the built-in field generated between MoTe2 and WS2. Thus, the outstanding findings of our experimental approach can facilitate novel two-dimensional devices for the optoelectronics industry.http://dx.doi.org/10.1063/1.5087091 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhangting Wu Nianchuang Zhu Jie Jiang Amina Zafar Jintao Hong Yang Zhang |
spellingShingle |
Zhangting Wu Nianchuang Zhu Jie Jiang Amina Zafar Jintao Hong Yang Zhang Tuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructure APL Materials |
author_facet |
Zhangting Wu Nianchuang Zhu Jie Jiang Amina Zafar Jintao Hong Yang Zhang |
author_sort |
Zhangting Wu |
title |
Tuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructure |
title_short |
Tuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructure |
title_full |
Tuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructure |
title_fullStr |
Tuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructure |
title_full_unstemmed |
Tuning interlayer coupling by laser irradiation and broadband photodetection in vertical MoTe2/WS2 vdW heterostructure |
title_sort |
tuning interlayer coupling by laser irradiation and broadband photodetection in vertical mote2/ws2 vdw heterostructure |
publisher |
AIP Publishing LLC |
series |
APL Materials |
issn |
2166-532X |
publishDate |
2019-04-01 |
description |
van der Waals (vdW) heterostructures constructed by stacking different two dimensional layered materials are extensively utilized in designing novel optoelectronic devices, such as photodetectors and light-emitting diodes. However, the performance of vertical heterostructures is impeded by challenges in effectively achieving interlayer coupling. Here, the systematic demonstration of vertical MoTe2/WS2 vdW heterostructures assembled by a mechanical transfer technique is reported, whereas the interlayer interaction is tuned from weak coupling to strong coupling by laser irradiation. Thereafter, the improved interlayer interaction of heterostructures is characterized by photoluminescence spectroscopy and further confirmed by electrical transport. Moreover, visible-infrared broadband photoresponse is achieved in the vertical stacking with the built-in field generated between MoTe2 and WS2. Thus, the outstanding findings of our experimental approach can facilitate novel two-dimensional devices for the optoelectronics industry. |
url |
http://dx.doi.org/10.1063/1.5087091 |
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