Facile and Controllable Synthesis of Large-Area Monolayer WS2 Flakes Based on WO3 Precursor Drop-Casted Substrates by Chemical Vapor Deposition

doi:10.3390/nano9040578

	Facile and Controllable Synthesis of Large-Area Monolayer WS2 Flakes Based on WO3 Precursor Drop-Casted Substrates by Chemical Vapor Deposition
	Shi, Biao1 ; Zhou, Daming1 ; Fang, Shaoxi1 ; Djebbi, Khouloud 1,2; Feng, Shuanglong1 ; Zhao, Hongquan1 ; Tlili, Chaker1 ; Wang, Deqiang1,2
刊名	NANOMATERIALS
	2019-04-01
卷号	9 期号:4 页码:12
关键词	WS2 2D materials large-area CVD fluorescence emission Raman mapping
ISSN号	2079-4991
DOI	10.3390/nano9040578
通讯作者	Tlili, Chaker(chakertlili@cigit.ac.cn) ; Wang, Deqiang(dqwang@cigit.ac.cn)
英文摘要	Monolayer WS2 (Tungsten Disulfide) with a direct-energy gap and excellent photoluminescence quantum yield at room temperature shows potential applications in optoelectronics. However, controllable synthesis of large-area monolayer WS2 is still challenging because of the difficulty in controlling the interrelated growth parameters. Herein, we report a facile and controllable method for synthesis of large-area monolayer WS2 flakes by direct sulfurization of powdered WO3 (Tungsten Trioxide) drop-casted on SiO2/Si substrates in a one-end sealed quartz tube. The samples were thoroughly characterized by an optical microscope, atomic force microscope, transmission electron microscope, fluorescence microscope, photoluminescence spectrometer, and Raman spectrometer. The obtained results indicate that large triangular monolayer WS2 flakes with an edge length up to 250 to 370 m and homogeneous crystallinity were readily synthesized within 5 min of growth. We demonstrate that the as-grown monolayer WS2 flakes show distinctly size-dependent fluorescence emission, which is mainly attributed to the heterogeneous release of intrinsic tensile strain after growth.
资助项目	National Natural Science Foundation of China[61701474] ; Natural Science Foundation of Chongqing, China[cstc2017jcyjAX0320] ; andWest Light Foundation of CAS
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	MDPI
WOS记录号	WOS:000467768800094
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/7904]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Tlili, Chaker; Wang, Deqiang
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing Key Lab Multi Scale Mfg Technol, Chongqing 400714, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi, Biao,Zhou, Daming,Fang, Shaoxi,et al. Facile and Controllable Synthesis of Large-Area Monolayer WS2 Flakes Based on WO3 Precursor Drop-Casted Substrates by Chemical Vapor Deposition[J]. NANOMATERIALS,2019,9(4):12.
APA	Shi, Biao.,Zhou, Daming.,Fang, Shaoxi.,Djebbi, Khouloud.,Feng, Shuanglong.,...&Wang, Deqiang.(2019).Facile and Controllable Synthesis of Large-Area Monolayer WS2 Flakes Based on WO3 Precursor Drop-Casted Substrates by Chemical Vapor Deposition.NANOMATERIALS,9(4),12.
MLA	Shi, Biao,et al."Facile and Controllable Synthesis of Large-Area Monolayer WS2 Flakes Based on WO3 Precursor Drop-Casted Substrates by Chemical Vapor Deposition".NANOMATERIALS 9.4(2019):12.