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Matches in SemOpenAlex for { <https://semopenalex.org/work/W2012185497> ?p ?o ?g. }

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• W2012185497 abstract "ZnO is a promising high figure-of-merit (ZT) thermoelectric material for power harvesting from heat due to its high melting point, high electrical conductivity σ, and Seebeck coefficient α, but its practical use is limited by a high lattice thermal conductivity κL. Here, we report Al-containing ZnO nanocomposites with up to a factor of 20 lower κL than non-nanostructured ZnO, while retaining bulklike α and σ. We show that enhanced phonon scattering promoted by Al-induced grain refinement and ZnAl2O4 nanoprecipitates presages ultralow κ ∼ 2 Wm −1 K–1 at 1000 K. The high α∼ −300 μV K–1 and high σ ∼ 1–104 Ω–1 m–1 result from an offsetting of the nanostructuring-induced mobility decrease by high, and nondegenerate, carrier concentrations obtained via excitation from shallow Al donor states. The resultant ZT ∼ 0.44 at 1000 K is 50% higher than that for the best non-nanostructured counterpart material at the same temperature and holds promise for engineering advanced oxide-based high-ZT thermoelectrics for applications." @default.
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• W2012185497 date "2011-09-26" @default.
• W2012185497 modified "2023-10-14" @default.
• W2012185497 title "Al-Doped Zinc Oxide Nanocomposites with Enhanced Thermoelectric Properties" @default.
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• W2012185497 doi "https://doi.org/10.1021/nl202439h" @default.
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