Thermoelectric performance in pseudo-ternary (PbTe)0.95-x(Sb2Se3)x(PbS)0.05 system with ultra-low thermal conductivity via multi-scale phonon scattering

被引：4
作者：
Zhang, C. C. [1 ]
Zhao, Y. [1 ]
Gu, P. [1 ]
Peng, L. M. [1 ]
机构：
[1] Univ Sci & Technol China, Sch Engn Sci, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Anhui, Peoples R China
来源：
CURRENT APPLIED PHYSICS | 2020年 / 20卷 / 09期
关键词：
Thermoelectric materials; PbTe; Sb2Se3; doping; Thermal conductivity; Multi-scale hierarchical architectures; N-TYPE PBTE; CONVERGENCE;
D O I：
10.1016/j.cap.2020.06.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Among the intermediate temperature (500-900 K) thermoelectric materials, both the pand n-type lead telluride (PbTe) compounds have attracted extensive interests. Till date various approaches were adopted to enhance the thermoelectric performance of n-type PbTe-based materials as they show greater potential space for further improvement compared to p-type ones. Herein, a pseudo-ternary n-type (PbTe)(0.95-x)(Sb2Se3)(x)(PbS)(0.05) system was designed and a large value of ZT = 1.61 at 850 K in case of x = 0.01 was achieved. Two factors are responsible for the improved thermoelectric performance. The incorporation of lead sulfide is the key factor to maintain a high level of power factor above 700 K and the multi-scale hierarchical architectures yield ultra-low thermal conductivity.
引用
收藏
页码：1008 / 1012
页数：5
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