ZT enhancement in solution-grown Sb(2-x)BixTe3 nanoplatelets.
ZT enhancement in solution-grown Sb(2-x)BixTe3 nanoplatelets.
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DOI：
10.1021/nn1008963
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发表时间：
2010-06
期刊：
影响因子：
17.1
通讯作者：
Marcus Scheele;N. Oeschler;I. Veremchuk;K. Reinsberg;Anna-Marlena Kreuziger;A. Kornowski;J. Broekaert-
中科院分区：
文献类型：
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作者：
Marcus Scheele;N. Oeschler;I. Veremchuk;K. Reinsberg;Anna-Marlena Kreuziger;A. Kornowski;J. Broekaert-
We report a solution-processed, ligand-supported synthesis of 15-20 nm thick Sb(2-x)BixTe3 nanoplatelets. After complete ligand removal by a facile NH3-based etching procedure, the platelets are spark plasma sintered to a p-type nanostructured bulk material with preserved crystal grain sizes. Due to this nanostructure, the total thermal conductivity is reduced by 60% in combination with a reduction in electric conductivity of as low as 20% as compared to the bulk material demonstrating the feasibility of the phonon-glass electron-crystal concept. An enhancement in the dimensionless thermoelectric figure of merit of up to 15% over state-of-the-art bulk materials is achieved, meanwhile, shifting the maximum to significantly higher temperatures.
