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Suppression of extra carriers for enhanced intrinsic piezoelectric properties of ultrathin MoS2 through various metal dopants
- Issue Date
- Nov-2022
- Publisher
- Elsevier Ltd
- Keywords
- Density functional theory; Metal doping; Molybdenum disulfide; Piezoelectric
- Citation
- Composites Part B: Engineering, v.246
- Journal Title
- Composites Part B: Engineering
- Volume
- 246
- ISSN
- 1359-8368
1879-1069
- Abstract
- We study the piezoelectric behavior of metal-doped monolayer MoS2. Its three-dimensional charge density, work function (WF), and piezoresponse with various metal dopants are theoretically predicted based on density functional theory, and the real-time piezoelectric power of these samples is experimentally verified. Selected p-type metal dopants (Au, Ag, Pd, Pt, and Al) increase the WF of monolayer MoS2, affecting electron emission from the MoS2 surface. The reason is that p-type metal dopants suppress excess electrons and prevent screening effects. A nanogenerator constructed from Au-doped monolayer MoS2 has been used to explore the possibility of a practical device. © 2022
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