Effect of Na and Ba co-doping on the structure and thermoelectric performance of PbTe0.5Se0.5

被引：11
作者：
Gui, Y. Q. [1 ]
Zheng, Y. S. [1 ]
Liu, F. S. [1 ]
Zhang, S. L. [1 ]
Ao, W. Q. [1 ]
Li, Y. [1 ]
Li, J. Q. [1 ]
机构：
[1] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China
来源：
SCRIPTA MATERIALIA | 2016年 / 120卷
基金：
中国国家自然科学基金;
关键词：
Spark plasma sintering; Thermoelectric materials; Thermal conductivity; Electrical properties; PbTe0.5Se0.5; THERMAL-CONDUCTIVITY; PBTE; POWER;
D O I：
10.1016/j.scriptamat.2016.04.009
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
PbTe-based semiconductor thermoelectric materials are currently active areas of research. In this work, Na- and Ba-doped PbTe0.5Se0.5 alloys were prepared by vacuum melting and spark plasma sintering techniques. Na doping suppressed the transition of PbTe0.5Se0.5 from p-type to n-type conductivity and adjusted the carrier concentration. In the case of Na-0.02(BaxPb1-x)(0.98)Te0.5Se0.5, doping with Ba increased the Seebeck coefficient, decreased the thermal conductivity, and improved the thermoelectric performance compared to those of the undoped material. A high figure of merit (ZT) value of 1.17 at 723 K was obtained for Na-0.02(Ba0.06Pb0.94)(0.98)Te0.5Se0.5, which is approximately 22% greater than that of the undoped sample. (C) 2016 Elsevier Ltd. All rights reserved.
引用
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页码：9 / 13
页数：5
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