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- W2808014703 abstract "Abstract Two-dimensional (2D) van der Waals heterostructures (vdWHs) have shown multiple functionalities with great potential in electronics and photovoltaics. Here, we show their potential for solid-state thermionic energy conversion and demonstrate a designing strategy towards high-performance devices. We propose two promising thermionic devices, namely, the p-type Pt-G-WSe 2 -G-Pt and n-type Sc-WSe 2 -MoSe 2 -WSe 2 -Sc. We characterize the thermionic energy conversion performance of the latter using first-principles GW calculations combined with real space Green’s function (GF) formalism. The optimal barrier height and high thermal resistance lead to an excellent performance. The proposed device is found to have a room temperature equivalent figure of merit of 1.2 which increases to 3 above 600 K. A high performance with cooling efficiency over 30% of the Carnot efficiency above 450 K is achieved. Our designing and characterization method can be used to pursue other potential thermionic devices based on vdWHs." @default.
- W2808014703 created "2018-06-21" @default.
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- W2808014703 date "2018-06-18" @default.
- W2808014703 modified "2023-10-17" @default.
- W2808014703 title "High-Performance Solid-State Thermionic Energy Conversion Based on 2D van der Waals Heterostructures: A First-Principles Study" @default.
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- W2808014703 doi "https://doi.org/10.1038/s41598-018-27430-0" @default.
- W2808014703 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6006252" @default.
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