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Synthesis of Submillimeter‐Scale Single Crystal Stannous Sulfide Nanoplates for Visible and Near‐Infrared Photodetectors with Ultrahigh Responsivity
Author(s) -
Li Qiu,
Wei Aixiang,
Lu Jianting,
Tao Lili,
Yang Yibin,
Luo Dongxiang,
Liu Jun,
Xiao Ye,
Zhao Yu,
Li Jingbo
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.201800154
Subject(s) - materials science , responsivity , photodetector , optoelectronics , raman spectroscopy , chemical vapor deposition , photoluminescence , infrared , graphene , single crystal , nanotechnology , optics , chemistry , physics , crystallography
Layered 2D semiconductors, such as graphene and transition‐metal dichalcogenides (TMDs), are receiving intensive attention owing to their great performance in electronic and optoelectronic application during the past few years. Among them, SnS has similar anisotropy to black phosphorus and high photoresponse in the near infrared range, rendering it as an ideal candidate for infrared photodetectors. In this work, large‐size (up to 330 µm) and high‐quality single‐crystalline SnS nanoplates are synthesized successfully via controlled chemical vapor deposition technique and characterized by field‐emission scanning electron microscopy, X‐ray diffraction, confocal Raman system, atomic force microscope, transmission electron microscopy, and photoluminescence spectroscopy. Photodetectors based on as‐grown SnS nanoplates are fabricated with back‐gated field effect transistors (FETs) configuration, exhibiting a high mobility of 17.1 cm 2 V −1 s −1 . Photodetectors based on the SnS FETs demonstrate excellent optoelectronic performance both in visible and near‐infrared spectral range. Typically, photoresponsivity of 197.7 A W −1 , photoresponse time of 39 ms, and external quantum efficiency of 6.06 × 10 4 % are exhibited under the irradiation of 405 nm laser. The wide response range and ultrahigh sensitivity make the large‐area single crystal SnS nanoplate a promising candidate for future application in optoelectronics.