Enhancement of the thermoelectric performance of Cu3SbSe4 particles by controlling morphology using exfoliated selenium nanosheets,Dalton Transactions

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Enhancement of the thermoelectric performance of Cu3SbSe4 particles by controlling morphology using exfoliated selenium nanosheets
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-06-20 , DOI: 10.1039/d2dt01181f
Minsu Kim ₁ , Dabin Park ₁ , Jooheon Kim _{1,

2,

3}

Affiliation

Copper antimony selenide (Cu₃SbSe₄), a ternary Cu-based material, is a promising p-type thermoelectric material. In this study, the morphology of Cu₃SbSe₄ particles was controlled using the shape of Se during the synthesis process. To this end, Se particles with a size of 20 μm were exfoliated to form nanosheets through an ultrasonication process without the oxidation of Se. The variation in the morphology of Cu₃SbSe₄ nanoparticles and nanosheets affected their grain size, thus affecting their electrical conductivity and lattice thermal conductivity owing to the phonon and electron scattering at the interface of the grains. By combining the effects of the morphological variation with the electrical and lattice thermal conductivity, the Cu₃SbSe₄ synthesized using Se nanosheets exhibited improved thermoelectric performance. The synthesized Cu₃SbSe₄ nanosheets achieved a maximum thermoelectric figure of merit value of 0.40, which was 1.41 times higher than that of Cu₃SbSe₄ nanoparticles.

中文翻译：

通过使用剥离的硒纳米片控制形态来增强 Cu3SbSe4 颗粒的热电性能

铜锑硒化物（Cu ₃ SbSe ₄）是一种三元Cu基材料，是一种很有前途的p型热电材料。在这项研究中，Cu ₃ SbSe ₄颗粒的形态是在合成过程中使用 Se 的形状来控制的。为此，通过超声波处理将大小为 20 μm 的 Se 颗粒剥离形成纳米片，而没有 Se 的氧化。Cu ₃ SbSe _{4的形貌变化}纳米颗粒和纳米片影响它们的晶粒尺寸，从而由于晶粒界面处的声子和电子散射而影响它们的电导率和晶格热导率。通过将形态变化的影响与电导率和晶格热导率相结合，使用Se纳米片合成的Cu ₃ SbSe ₄表现出改善的热电性能。合成的Cu ₃ SbSe _{4纳米片的最大热电品质因数为0.40，是Cu}₃ SbSe ₄纳米颗粒的1.41倍。

更新日期：2022-06-23

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