Enhanced thermoelectric performance through homogenously dispersed MnTe nanoparticles in p-type Bi0.52Sb1.48Te3 nanocomposites

doi:10.1088/1674-1056/27/4/047207

中国物理B ›› 2018, Vol. 27 ›› Issue (4): 47207-047207.doi: 10.1088/1674-1056/27/4/047207

所属专题： SPECIAL TOPIC — Recent advances in thermoelectric materials and devices

• TOPIC REVIEW—Thermal and thermoelectric properties of nano materials • 上一篇下一篇

Enhanced thermoelectric performance through homogenously dispersed MnTe nanoparticles in p-type Bi_0.52Sb_1.48Te₃ nanocomposites

Tian-Qi Lu(陆天奇), Peng-Fei Nan(南鹏飞), Si-Long Song(宋思龙), Xin-Yue Zhu(朱欣悦), Huai-Zhou Zhao(赵怀周), Yuan Deng(邓元)

1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3. Electronic Science and Technology, Beijing University of Posts and Telecommunications, Beijing 102101, China

收稿日期:2017-12-18 修回日期:2017-12-25 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: Huai-Zhou Zhao, Yuan Deng E-mail:Hzhao@iphy.ac.cn;dengyuan@buaa.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. U1601213 and 51472052) and the Funds from Institute of Physics, Chinese Academy of Sciences.

Enhanced thermoelectric performance through homogenously dispersed MnTe nanoparticles in p-type Bi_0.52Sb_1.48Te₃ nanocomposites

Tian-Qi Lu(陆天奇)^1,2, Peng-Fei Nan(南鹏飞)², Si-Long Song(宋思龙)¹, Xin-Yue Zhu(朱欣悦)³, Huai-Zhou Zhao(赵怀周)², Yuan Deng(邓元)¹

1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3. Electronic Science and Technology, Beijing University of Posts and Telecommunications, Beijing 102101, China

Received:2017-12-18 Revised:2017-12-25 Online:2018-04-05 Published:2018-04-05
Contact: Huai-Zhou Zhao, Yuan Deng E-mail:Hzhao@iphy.ac.cn;dengyuan@buaa.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. U1601213 and 51472052) and the Funds from Institute of Physics, Chinese Academy of Sciences.

摘要/Abstract

摘要：

In this work, we report that the thermoelectric properties of Bi_0.52Sb_1.48Te₃ alloy can be enhanced by being composited with MnTe nano particles (NPs) through a combined ball milling and spark plasma sintering (SPS) process. The addition of MnTe into the host can synergistically reduce the lattice thermal conductivity by increasing the interface phonon scattering between Bi_0.52Sb_1.48Te₃ and MnTe NPs, and enhance the electrical transport properties by optimizing the hole concentration through partial Mn²⁺ acceptor doping on the Bi³⁺ sites of the host lattice. It is observed that the lattice thermal conductivity decreases with increasing the percentage of MnTe and milling time in a temperature range from 300 K to 500 K, which is consistent with the increasing of interfaces. Meanwhile, the bipolar effect is constrained to high temperatures, which results in the figure of merit zT peak shifting toward higher temperature and broadening the zT curves. The engineering zT is obtained to be 20% higher than that of the pristine sample for the 2-mol% MnTe-added composite at a temperature gradient of 200 K when the cold end temperature is set to be 300 K. This result indicates that the thermoelectric performance of Bi_0.52Sb_1.48Te₃ can be considerably enhanced by being composited with MnTe NPs.

关键词: MnTe nano particles, interface phonon scattering bipolar effect, higher engineering zT

Abstract:

Key words: MnTe nano particles, interface phonon scattering bipolar effect, higher engineering zT

中图分类号: (Thermoelectric and thermomagnetic effects)

72.20.Pa

73.50.Lw (Thermoelectric effects)

陆天奇, 南鹏飞, 宋思龙, 朱欣悦, 赵怀周, 邓元. Enhanced thermoelectric performance through homogenously dispersed MnTe nanoparticles in p-type Bi_0.52Sb_1.48Te₃ nanocomposites[J]. 中国物理B, 2018, 27(4): 47207-047207.

Tian-Qi Lu(陆天奇), Peng-Fei Nan(南鹏飞), Si-Long Song(宋思龙), Xin-Yue Zhu(朱欣悦), Huai-Zhou Zhao(赵怀周), Yuan Deng(邓元). Enhanced thermoelectric performance through homogenously dispersed MnTe nanoparticles in p-type Bi_0.52Sb_1.48Te₃ nanocomposites[J]. Chin. Phys. B, 2018, 27(4): 47207-047207.

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Enhanced thermoelectric performance through homogenously dispersed MnTe nanoparticles in p-type Bi_0.52Sb_1.48Te₃ nanocomposites

Enhanced thermoelectric performance through homogenously dispersed MnTe nanoparticles in p-type Bi_0.52Sb_1.48Te₃ nanocomposites

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