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- W2020897757 abstract "Rare-earth impurities in III–V semiconductors are known to self-assemble into semimetallic nanoparticles which have been shown to reduce lattice thermal conductivity without harming electronic properties. Here, we show that adjusting the band alignment between ErAs and In0.53Ga0.47−XAlXAs allows energy-dependent scattering of carriers that can be used to increase thermoelectric power factor. Films of various Al concentrations were grown by molecular beam epitaxy, and thermoelectric properties were characterized. We observe concurrent increases in electrical conductivity and Seebeck coefficient with increasing temperatures, demonstrating energy-dependent scattering. We report the first simultaneous power factor enhancement and thermal conductivity reduction in a nanoparticle-based system, resulting in a high figure of merit, ZT=1.33 at 800 K." @default.
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- W2020897757 date "2010-12-15" @default.
- W2020897757 modified "2023-09-30" @default.
- W2020897757 title "High efficiency semimetal/semiconductor nanocomposite thermoelectric materials" @default.
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- W2020897757 doi "https://doi.org/10.1063/1.3514145" @default.
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