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Nano Research 2017, 10(10): 3476-3485 https://doi.org/10.1007/s12274-017-1559-6
Research Article | Issue | Published: 08 June 2017

Strain modulation on graphene/ZnO nanowire mixed- dimensional van der Waals heterostructure for high-performance photosensor

Show Author's Information Shuo Liu1,§,  Qingliang Liao1,§,  Zheng Zhang1( ),  Xiankun Zhang1,  Shengnan Lu1,  Lixin Zhou1,  Mengyu Hong1,  Zhuo Kang1,  Yue Zhang1,2( )
State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083 China
Beijing Municipal Key Laboratory for Advanced Energy Materials and Technologies University of Science and Technology BeijingBeijing 100083 China

§ Shuo Liu and Qingliang Liao contributed equally to this work.

Keywords:
graphene, photosensor, ZnO nanowire, vdW heterostructure, strain modulation
Cite this article:
Liu S, Liao Q, Zhang Z, et al. Strain modulation on graphene/ZnO nanowire mixed- dimensional van der Waals heterostructure for high-performance photosensor. Nano Research, 2017, 10(10): 3476-3485. https://doi.org/10.1007/s12274-017-1559-6
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Abstract Full text Electronic supplementary material About this article

The mixed-dimensional van der Waals (vdW) heterostructure is a promising building block for strained electronics and optoelectronics because it avoids the bond fracture and atomic reconstruction under strain. We propose a novel mixed-dimensional vdW heterostructure between two-dimensional graphene and a one-dimensional ZnO nanowire for high-performance photosensing. By utilizing the piezoelectric properties of ZnO, strain modulation was accomplished in the mixed-dimensional vdW heterostructure to optimize the device per­formance. By combining the ultrahigh electrons transfer speed in graphene and the extremely long life time of holes in ZnO, an outstanding responsivity of 1.87 × 105 A/W was achieved. Under a tensile strain of only 0.44% on the ZnO nanowire, the responsivity was enhanced by 26%. A competitive model was proposed, in which the performance enhancement is due to the efficient promotion of the injection of photogenerated electrons from the ZnO into the graphene caused by the strain-induced positive piezopotential. Our study provides a strain-engineering strategy for controlling the behavior of the photocarriers in the mixed-dimensional vdW heterostructure, which can be also applied to other similar systems in the future.


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About this article

Strain modulation on graphene/ZnO nanowire mixed- dimensional van der Waals heterostructure for high-performance photosensor

Show Author's information Shuo Liu1,§, Qingliang Liao1,§, Zheng Zhang1( ), Xiankun Zhang1, Shengnan Lu1, Lixin Zhou1, Mengyu Hong1, Zhuo Kang1, Yue Zhang1,2( )
State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083 China
Beijing Municipal Key Laboratory for Advanced Energy Materials and Technologies University of Science and Technology BeijingBeijing 100083 China

§ Shuo Liu and Qingliang Liao contributed equally to this work.

Abstract

The mixed-dimensional van der Waals (vdW) heterostructure is a promising building block for strained electronics and optoelectronics because it avoids the bond fracture and atomic reconstruction under strain. We propose a novel mixed-dimensional vdW heterostructure between two-dimensional graphene and a one-dimensional ZnO nanowire for high-performance photosensing. By utilizing the piezoelectric properties of ZnO, strain modulation was accomplished in the mixed-dimensional vdW heterostructure to optimize the device per­formance. By combining the ultrahigh electrons transfer speed in graphene and the extremely long life time of holes in ZnO, an outstanding responsivity of 1.87 × 105 A/W was achieved. Under a tensile strain of only 0.44% on the ZnO nanowire, the responsivity was enhanced by 26%. A competitive model was proposed, in which the performance enhancement is due to the efficient promotion of the injection of photogenerated electrons from the ZnO into the graphene caused by the strain-induced positive piezopotential. Our study provides a strain-engineering strategy for controlling the behavior of the photocarriers in the mixed-dimensional vdW heterostructure, which can be also applied to other similar systems in the future.

Keywords: graphene, photosensor, ZnO nanowire, vdW heterostructure, strain modulation

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Publication history
Copyright
Acknowledgements

Publication history

Received: 21 December 2016
Revised: 15 February 2017
Accepted: 23 February 2017
Published: 08 June 2017
Issue date: October 2017

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017

Acknowledgements

Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2013CB932602), the National Key Research and Development Program of China (No. 2016YFA0202701), the Program of Introducing Talents of Discipline to Universities (No. B14003), National Natural Science Foundation of China (Nos. 51672026, 51602020, 51527802, and 51232001), China Postdoctoral Science Foundation (Nos. 2015M580981 and 2016T90033), Beijing Municipal Science & Technology Commission, and the State Key Laboratory for Advanced Metals and Materials (No. 2016Z-06), and the Fundamental Research Funds for the Central Universities (Nos. FRF-TP-15-075A1, FRF-BR-15-036A, and FRF-AS-15-002).

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