Promoting the optoelectronic and ferromagnetic properties of Cr2S3 nanosheets via Se doping

Doping can change the band structure of semiconductors, thereby affecting their electrical, optical, and magnetic properties. In this study, we describe the synthesis of two-dimensional (2D) Se-doped Cr 2 S 3 (Se-Cr 2 S 3 ) nanosheets using the chemical vapor deposition method. In these semiconducto...

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Bibliographic Details
Published in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2022-07, Vol.65 (7), p.276811, Article 276811
Main Authors: Zhou, Xinyun, Liu, Chang, Song, Lingting, Zhang, Hongmei, Huang, Ziwei, He, Chenglin, Li, Bailing, Lin, Xiaohui, Zhang, Zucheng, Shi, Shun, Shen, Dingyi, Song, Rong, Li, Jia, Liu, Xingqiang, Zou, Xuming, Huang, Le, Liao, Lei, Duan, Xidong, Li, Bo
Format: Article
Language:English
Subjects:
Astronomy
Chemical vapor deposition
Chromium
Classical and Continuum Physics
Crystal structure
Curie temperature
Density functional theory
Doping
Electrons
Ferromagnetism
Laboratories
Lasers
Magnetic properties
Nanosheets
Nondestructive testing
Observations and Techniques
Optical properties
Optoelectronic devices
Performance evaluation
Photometers
Physics
Physics and Astronomy
Polymethyl methacrylate
Room temperature
Semiconductors
Thermal conductivity
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Summary:Doping can change the band structure of semiconductors, thereby affecting their electrical, optical, and magnetic properties. In this study, we describe the synthesis of two-dimensional (2D) Se-doped Cr 2 S 3 (Se-Cr 2 S 3 ) nanosheets using the chemical vapor deposition method. In these semiconductor nanosheets, the Se doping concentration can be controlled by tuning the Se/S mass ratio in the precursor. At the doping concentrations of 10.05% and 2.05%, the room temperature conductivity and mobility were increased by nearly 4 and 2 orders of magnitude, respectively. In addition, the response time of an ultrathin Se-Cr 2 S 3 photo-detector was 200 times shorter than that of an undoped Cr 2 S 3 nanosheet photodetector. 4.07%-Se-Cr 2 S 3 nanosheets show ferrimagnetic behavior with a Curie temperature of ∼200 K, which is 80 K higher than that of undoped Cr 2 S 3 nanosheets. A density functional theory calculation indicated that the Se doping can induce the formation of intercalated Cr vacancies in Se-Cr 2 S 3 and enhance its metallic characteristics. Our results demonstrated that Se-Cr 2 S 3 has significant potential in future electronic, optoelectronic, and spintronic devices.
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-022-1914-2