Crystalline-amorphous silicon nano-composites: Nano-pores and nano-inclusions impact on the thermal conductivity

Abstract : The thermal conductivities of nanoporous and nanocompositesilicon with incorporated amorphous phases have been computed by molecular dynamics simulations. A systematic investigation of the porosity and the width of the amorphous shell contouring a spherical pore has been made. The impact of amorphous phase nanoinclusions in a crystalline matrix has also been studied with the same amorphous fraction as the porosity of nanoporoussilicon to achieve comparison. The key parameter for all configurations with or without the amorphous phase is proved to be the interface (between the crystalline and amorphous phases or crystalline and void) to volume ratio. We obtain the sub-amorphous thermal conductivity for several configurations by combining pores, amorphous shell, and crystalline phase. These configurations are promising candidates for low cost and not toxic thermoelectric devices based on abundant semiconductors.
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Article dans une revue
Journal of Applied Physics, American Institute of Physics, 2016, 119 (175104), 175104 / 8p. 〈10.1063/1.4948337〉
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https://hal.univ-lorraine.fr/hal-01410127
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Soumis le : mardi 6 décembre 2016 - 14:31:20
Dernière modification le : dimanche 8 juillet 2018 - 17:32:02

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Maxime Verdier, Konstantinos Termentzidis, David Lacroix. Crystalline-amorphous silicon nano-composites: Nano-pores and nano-inclusions impact on the thermal conductivity. Journal of Applied Physics, American Institute of Physics, 2016, 119 (175104), 175104 / 8p. 〈10.1063/1.4948337〉. 〈hal-01410127〉

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