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High Detectivity from a Lateral Graphene–MoS 2 Schottky Photodetector Grown by Chemical Vapor Deposition
Author(s) -
Deng Wenjie,
Chen Yongfeng,
You Congya,
Liu Beiyun,
Yang Yanhan,
Shen Gaoliang,
Li Songyu,
Sun Ling,
Zhang Yongzhe,
Yan Hui
Publication year - 2018
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800069
Subject(s) - materials science , photodetector , optoelectronics , responsivity , specific detectivity , fabrication , heterojunction , chemical vapor deposition , graphene , schottky barrier , schottky diode , semiconductor , nanotechnology , diode , medicine , alternative medicine , pathology
2D material–based photodetectors have demonstrated the great potential in future optoelectric applications and the compatibility with the traditional semiconductor technology. However, low detectivity and difficulty of large‐scale fabrication still limit their application. Here, an ultrasensitive in‐plane lateral graphene–MoS 2 heterostructure is successfully constructed using one‐step growth by chemical vapor deposition, which is suitable for large‐scale fabrication. The Schottky junction is formed in the channel with the edge contact of graphene and MoS 2 . It displays good rectification characteristics with an on/off ratio up to 10 6 . As a photodetector, it exhibits excellent detectivity with the specific detectivity D* up to 1.4 × 10 14 Jones and the responsivity of 1.1 × 10 5 A W −1 , which benefit from strong absorption, the efficient separation of the photoexcited carriers, and quick charge transport in the Schottky junction device. Moreover, heterostructure photodetector array is demonstrated here which shows the large‐scale fabrication capacity. All of these results prove the potential of 2D material–based junction devices for optoelectronic devices.