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- W3048932265 abstract "In this work, we report a series of Cu3RTe3 (R = Y, Sm, and Dy) ternary compounds with a trigonal structure (R3̅) as a family of new thermoelectric materials. First-principles calculations show that Cu3RTe3 (R = Y, Sm, and Dy) compounds are semiconductors with similar band structures and moderate band gaps (0.69-0.82 eV). The synthesized polycrystalline Cu3RTe3 (R = Y, Sm, and Dy) compounds possess moderate carrier concentrations (0.8-2.2 × 1020 cm-3) and density-of-state effective masses (around 1.1 me), yielding decent electrical transport performance. Furthermore, intrinsically low lattice thermal conductivities, below 1 W m-1 K-1 at 300-900 K, originating from the heavy average atomic masses and large number of atoms in the unit cell, are observed for Cu3RTe3 (R = Y, Sm, and Dy). Finally, Cu3DyTe3 demonstrates a peak dimensionless figure of merit of 0.9 at 900 K, which is among the highest reported for the Cu/Ag-based tellurides." @default.
- W3048932265 created "2020-08-18" @default.
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- W3048932265 date "2020-08-11" @default.
- W3048932265 modified "2023-10-17" @default.
- W3048932265 title "Ternary Compounds Cu<sub>3</sub><i>R</i>Te<sub>3</sub> (<i>R</i> = Y, Sm, and Dy): A Family of New Thermoelectric Materials with Trigonal Structures" @default.
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- W3048932265 doi "https://doi.org/10.1021/acsami.0c09918" @default.
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