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Investigation for Thermoelectric Properties of the MoS(2) Monolayer–Graphene Heterostructure: Density Functional Theory Calculations and Electrical Transport Measurements

[Image: see text] We investigated the thermoelectric (TE) properties of the MoS(2) monolayer–graphene heterostructure which consists of the MoS(2) monolayer and graphene. The electronic structures of the MoS(2) monolayer–graphene heterostructure are mainly contributed from graphene and the MoS(2) mo...

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Detalles Bibliográficos
Autores principales: Kim, Sujee, Lee, Changhoon, Lim, Young Soo, Shim, Ji-Hoon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7807777/
https://www.ncbi.nlm.nih.gov/pubmed/33458479
http://dx.doi.org/10.1021/acsomega.0c04488
Descripción
Sumario:[Image: see text] We investigated the thermoelectric (TE) properties of the MoS(2) monolayer–graphene heterostructure which consists of the MoS(2) monolayer and graphene. The electronic structures of the MoS(2) monolayer–graphene heterostructure are mainly contributed from graphene and the MoS(2) monolayer for the valence band maximum and conduction band minimum, respectively. The change in the electronic structures near the Fermi level is responsible for the fact that the calculated Seebeck coefficients S and electrical conductivity σ/τ of MoS(2) monolayer–graphene are largely affected from those of graphene and the MoS(2) monolayer. Its power factor S(2)σ/τ is increased compared to those of graphene and the MoS(2) monolayer at an electron concentration of 10(11) to 10(12) cm(–2), which corresponds to a three-dimensional concentration of 3 × 10(18) to 3 × 10(19) cm(–3). We also demonstrated that the MoS(2) monolayer shows the p-type TE behavior, while the MoS(2) monolayer–graphene heterostructure is given to the n-type TE material. The current study provides a strategy to improve TE properties of the MoS(2) monolayer through the formation of the MoS(2) monolayer–graphene heterostructure.