Effects of Sn-deficiency on thermoelectric properties of polycrystalline Sn1-xSe compounds

被引：17

作者：

Lee, Sang Tae ^{[1
]}

Kim, Min Ji ^{[1
]}

Lee, Gil-Geun ^{[1
]}

Kim, Sung Gyoo ^{[1
]}

Lee, Soonil ^{[2
]}

Seo, Won-Seon ^{[2
]}

Lim, Young Soo ^{[1
]}

机构：

[1] Pukyong Natl Univ, Dept Mat Syst Engn, Busan 48513, South Korea

[2] Korea Inst Ceram Engn & Technol, Div Energy & Environm, Jinju 52851, South Korea

来源：

CURRENT APPLIED PHYSICS | 2017年 / 17卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

Thermoelectric; ZT; SnSe; SnSe2; Polycrystal; THERMAL-CONDUCTIVITY; TRANSPORT-PROPERTIES; PERFORMANCE; SNSE2; CRYSTALS;

D O I：

10.1016/j.cap.2017.02.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of Sn-deficiency on the thermoelectric properties of polycrystalline Sni(1-x)Se (x = 0, 0.01, 0.02, and 0.04) compounds were investigated. The Sn-deficiency caused the formation of the SnSe2 secondary phase in the compounds, and the charge and thermal transport properties were affected significantly by the secondary phase. Although the Sn-deficient compounds exhibited higher thermal conductivities than stoichiometric compound due to its high thermal conductivity of SnSe2, significantly improved power factors led to the enhancement of ZT. The highest ZT of 0.61 at 848 K was achieved in Sn0.98Se compound, and detailed effects of SnSe2 on the enhancement were discussed. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：732 / 737

页数：6

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