Electronic state evolution of oxygen-doped monolayer WSe2 assisted by femtosecond laser irradiation

doi:10.1039/d2cp04495a

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	Electronic state evolution of oxygen-doped monolayer WSe2 assisted by femtosecond laser irradiation
	L. Wang; D. Wang; Y. Luo; C. Y. Xu; L. Cui; X. B. Li and H. B. Sun
	2023
发表期刊	Physical Chemistry Chemical Physics
ISSN	1463-9076
卷号	25 期号:3 页码:2043-2049
摘要	Electronic states are significantly correlated with chemical compositions, and the information related to these factors is especially crucial for the manipulation of the properties of matter. However, this key information is usually verified by after-validation methods, which could not be obtained during material processing, for example, in the field of femtosecond laser direct writing inside materials. Here, critical evolution stages of electronic states for monolayer tungsten diselenide (WSe2) around the modification threshold (at a Mott density of similar to 10(13) cm(-2)) are observed by broadband femtosecond transient absorption spectroscopy, which is associated with the intense femtosecond-laser-assisted oxygen-doping mechanism. First-principles calculations and control experiments on graphene-covered monolayer WSe2 further confirm this modification mechanism. Our findings reveal a photochemical reaction for monolayer WSe2 under the Mott density condition and provide an electronic state criterion to in situ monitor the degrees of modification in monolayer transition metal dichalcogenides during the femtosecond laser modification.
DOI	10.1039/d2cp04495a
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收录类别	sci ; ei
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66615
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	L. Wang,D. Wang,Y. Luo,et al. Electronic state evolution of oxygen-doped monolayer WSe2 assisted by femtosecond laser irradiation[J]. Physical Chemistry Chemical Physics,2023,25(3):2043-2049.
APA	L. Wang,D. Wang,Y. Luo,C. Y. Xu,L. Cui,&X. B. Li and H. B. Sun.(2023).Electronic state evolution of oxygen-doped monolayer WSe2 assisted by femtosecond laser irradiation.Physical Chemistry Chemical Physics,25(3),2043-2049.
MLA	L. Wang,et al."Electronic state evolution of oxygen-doped monolayer WSe2 assisted by femtosecond laser irradiation".Physical Chemistry Chemical Physics 25.3(2023):2043-2049.

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