Simultaneous Optimization of Power Factor and Thermal Conductivity towards High-Performance InSb-Based Thermoelectric Materials
Wang Li , Tian Xu , Zheng Ma , Abubakar-Yakubu Haruna, Qing-Hui Jiang , Yu-Bo Luo* , and Jun-You Yang*
State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract ：Thermoelectric performance of InSb is restricted by its low Seebeck coefficient and high thermal conductivity. Here, CuCl is employed to optimize simultaneously the electrical and thermal transport properties of InSb. The substitution of Cl for Sb results in enhanced electron effective mass, leading to high Seebeck coefficient of $-159.9$ µV/K and high power factor of 31.5 µW$\cdot$cm$^{-1}$$\cdot$K$^{-2}$ at 733 K for InSb + 5 wt% CuCl sample. In addition, CuCl doping creates hierarchical architectures composed of Cu$_{9}$In$_{4}$, Sb, Cu$_{2}$Sb in InSb, leading to a strengthened phonon scattering in a wide wavelength (i.e., nano to meso scale), thus a low lattice thermal conductivity of 2.97 W$\cdot$m$^{-1}$$\cdot$K$^{-1}$ at 733 K in InSb + 5 wt% CuCl. As a result, a maximum $ZT$ of 0.77 at 733 K has been achieved for the InSb + 5 wt% CuCl sample, increasing by $\sim $250% compared to pristine InSb.
收稿日期: 2021-08-01
出版日期: 2021-09-02
:
72.20.Pa
(Thermoelectric and thermomagnetic effects)
61.72.uj
(III-V and II-VI semiconductors)
66.70.Df
(Metals, alloys, and semiconductors)
引用本文:
. [J]. 中国物理快报, 2021, 38(9): 97201-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/38/9/097201
或
https://cpl.iphy.ac.cn/CN/Y2021/V38/I9/97201
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2021, Vol. 38 
