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Modulating Electronic Structure of Monolayer Transition Metal Dichalcogenides by Substitutional Nb-Doping
Tang, Lei; Xu, Runzhang; Tan, Junyang; Luo, Yuting; Zou, Jingyun; Zhang, Zongteng; Zhang, Rongjie; Zhao, Yue; Lin, Junhao; Zou, Xiaolong; Liu, Bilu; Cheng, Hui-Ming
2020-10-27
Source PublicationADVANCED FUNCTIONAL MATERIALS
AbstractModulating electronic structure of monolayer transition metal dichalcogenides (TMDCs) is important for many applications, and doping is an effective way toward this goal, yet is challenging to control. Here, the in situ substitutional doping of niobium (Nb) into TMDCs with tunable concentrations during chemical vapor deposition is reported. Taking monolayer WS2 as an example, doping Nb into its lattice leads to bandgap changes in the range of 1.98-1.65 eV. Noteworthy, electrical transport measurements and density functional theory calculations show that the 4d electron orbitals of the Nb dopants contribute to the density of states of Nb-doped WS2 around the Fermi level, resulting in an n- to p-type conversion. Nb-doping also reduces the energy barrier of hydrogen absorption in WS2, leading to an improved electrocatalytic hydrogen evolution performance. These results highlight the effectiveness of controlled doping in modulating the electronic structure of TMDCs and their use in electronic related applications.
DOI10.1002/adfm.202006941
WOS IDWOS:000583866700001
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82416
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Tang, Lei,Xu, Runzhang,Tan, Junyang,et al. Modulating Electronic Structure of Monolayer Transition Metal Dichalcogenides by Substitutional Nb-Doping[J]. ADVANCED FUNCTIONAL MATERIALS,2020.
APA Tang, Lei.,Xu, Runzhang.,Tan, Junyang.,Luo, Yuting.,Zou, Jingyun.,...&Cheng, Hui-Ming.(2020).Modulating Electronic Structure of Monolayer Transition Metal Dichalcogenides by Substitutional Nb-Doping.ADVANCED FUNCTIONAL MATERIALS.
MLA Tang, Lei,et al."Modulating Electronic Structure of Monolayer Transition Metal Dichalcogenides by Substitutional Nb-Doping".ADVANCED FUNCTIONAL MATERIALS (2020).
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