Solid-State Synthesis and Thermoelectric Performance of Cu3Sb1−yBIII ySe4 (BIII = Al, In) Permingeatites

Author:

Kim Ho-Jeong,Kim Il-Ho

Abstract

Permingeatite (Cu3SbSe4) is a promising thermoelectric material with narrow bandgap energy and large carrier effective mass. However, doping is required to improve its electrical conductivity and thermoelectric properties. In this study, Cu3Sb1−y(Al/In)ySe4 doped with BIII-group elements (Al or In) at the Sb sites was synthesized using mechanical alloying followed by sintering through hot pressing. The resulting Cu3Sb1−y(Al/In)ySe4 contained a single phase of permingeatite with a tetragonal structure and therefore achieved a high relative density of 97.5–99.2%. The substitution of Al/In at the Sb sites produced lattice constants of a = 0.5652–0.5654 nm and c = 1.1249–1.1254 nm. As the Al/In doping content increased, the carrier (hole) concentration increased, reducing the Seebeck coefficient and increasing the electrical and thermal conductivities. Substituting Al3+ or In3+ at the Sb5+ site can generate additional carriers, resulting in a high electrical conductivity of (1.4–1.1) × 104 Sm−1 at 323–623 K for Cu3Sb0.92In0.08Se4. Cu3Sb0.96Al0.04Se4 exhibited a maximum power factor of 0.51 mWm−1K−2 at 623 K and a minimum thermal conductivity of 0.74 Wm−1K−1, resulting in a maximum dimensionless figure of merit, ZT, of 0.42 at 623 K. Cu3Sb0.96In0.04Se4 obtains a ZT of 0.47 at 623 K, indicating a high power factor of 0.65 mWm−1K−2 at 623 K and low thermal conductivity of 0.84 Wm−1K−1 at 523 K.

Funder

Ministry of Education

Publisher

The Korean Institute of Metals and Materials

Subject

Metals and Alloys,Surfaces, Coatings and Films,Modeling and Simulation,Electronic, Optical and Magnetic Materials

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3