Simultaneous Optimization of Power Factor and Thermal Conductivity towards High-Performance InSb-Based Thermoelectric Materials  

作　　者：Wang Li Tian Xu Zheng Ma Abubakar-Yakubu Haruna Qing-Hui Jiang Yu-Bo Luo Jun-You Yang 李旺;许天;马征;Abubakar-Yakubu Haruna;姜庆辉;罗裕波;杨君友(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Chinese Physics Letters》2021年第9期80-84,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.52002137,51772109,51872102;51802070);the Fundamental Research Funds for the Central Universities(Grant Nos.2021XXJS008 and 2018KFYXKJC002);Graduates’Innovation Fund of Huazhong University of Science and Technology(Grant No.2020yjsCXCY022)。

摘　　要：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·cm^(-1)·K^(-2) at 733 K for InSb+5 wt% CuCl sample.In addition,CuCl doping creates hierarchical architectures composed of CugIn4,Sb,Cu2Sb 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·m^(-1)· 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 ~250% compared to pristine InSb.

关 键 词：INSB SCATTERING SEEBECK 

分 类 号：TB34[一般工业技术—材料科学与工程]