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NaCl-Assisted CVD Synthesis, Transfer and Persistent Photoconductivity Properties of Two-Dimensional Transition Metal Dichalcogenides

Published online by Cambridge University Press:  05 February 2018

Yong Xie ,
Xiaohua Ma ,
Zhan Wang ,
Tang Nan ,
Ruixue Wu ,
Peng Zhang ,
Haolin Wang ,
Yabin Wang ,
Yongjie Zhan  and
Yue Hao
Yong Xie*
Affiliation:
School of Advanced Materials and Nanotechnology, Xidian University, Xi’an710071, China Key Laboratory of Wide Band-Gap Semiconductor Technology, Xidian University, Xi’an710071, China Case Western Reserve University, Cleveland, OH44106, USA State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Xiaohua Ma
Affiliation:
School of Advanced Materials and Nanotechnology, Xidian University, Xi’an710071, China Key Laboratory of Wide Band-Gap Semiconductor Technology, Xidian University, Xi’an710071, China
Zhan Wang
Affiliation:
School of Advanced Materials and Nanotechnology, Xidian University, Xi’an710071, China
Tang Nan
Affiliation:
School of Advanced Materials and Nanotechnology, Xidian University, Xi’an710071, China
Ruixue Wu
Affiliation:
School of Advanced Materials and Nanotechnology, Xidian University, Xi’an710071, China
Peng Zhang
Affiliation:
School of Advanced Materials and Nanotechnology, Xidian University, Xi’an710071, China Key Laboratory of Wide Band-Gap Semiconductor Technology, Xidian University, Xi’an710071, China
Haolin Wang
Affiliation:
School of Advanced Materials and Nanotechnology, Xidian University, Xi’an710071, China Key Laboratory of Wide Band-Gap Semiconductor Technology, Xidian University, Xi’an710071, China
Yabin Wang
Affiliation:
Universität Erlangen-Nürnberg, Erlangen91058, Germany
Yongjie Zhan
Affiliation:
Institute of Photonics and Photon Technology, Northwest University, Xi’an710069, China
Yue Hao
Affiliation:
Key Laboratory of Wide Band-Gap Semiconductor Technology, Xidian University, Xi’an710071, China
*
*(Email: yxie@xidian.edu.cn)
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Abstract

Transition metal dichalcogenides (TMDC), such as MoS2, WS2 have attracted attention due to their mechanical and electronic properties in their two dimensional (2D) structures. Here, we report a facile growth of monolayer TMDC using oxide source materials with the assistant of NaCl. The addition of NaCl can enhance the lateral growth and widen the growth window of TMDC. Through carefully controlling the growth parameters, large area growth of TMDC can be achieved. Two steps E-beam lithography was utilized to fabricate electrodes of TMDC. The phototransistors made from the CVD grown TMDC show strong persistent photoconductivity (PPC). It was finally shown that TMDC device capping with h-BN could have suppressed PPC effects.

Keywords

chemical vapor deposition (CVD) (deposition)optoelectronicphotoconductivity
Type
Articles
Information
MRS Advances , Volume 3 , Issue 6-7: Nanomaterials , 2018 , pp. 365 - 371
Copyright
Copyright © Materials Research Society 2018 

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