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[1]沈亚伟,潘林,王一峰.In掺杂对Cu2SnS3结构和电输运性能的影响[J].南京工业大学学报(自然科学版),2017,39(03):21-25.[doi:10.3969/j.issn.1671-7627.2017.03.005]
 SHEN Yawei,PAN Lin,WANG Yifeng.Effects of In doping on the structure and electrical transport properties of Cu2SnS3[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2017,39(03):21-25.[doi:10.3969/j.issn.1671-7627.2017.03.005]
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In掺杂对Cu2SnS3结构和电输运性能的影响()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
39
期数:
2017年03期
页码:
21-25
栏目:
出版日期:
2017-05-20

文章信息/Info

Title:
Effects of In doping on the structure and electrical transport properties of Cu2SnS3
文章编号:
1671-7627(2017)03-0021-05
作者:
沈亚伟潘林王一峰
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
SHEN YaweiPAN LinWANG Yifeng
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
Cu2SnS3 In掺杂 结构转变 功率因子
Keywords:
Cu2SnS3 In doping structure evolution power factor
分类号:
TQ125.1
DOI:
10.3969/j.issn.1671-7627.2017.03.005
文献标志码:
A
摘要:
通过固相合成法制备In掺杂p型Cu2SnS3的致密块体Cu2Sn1-xInxS3,考察其晶体结构和电输运特性。结果表明:In置换Sn引入空穴极大地提高电导率,且增加价带顶的简并度(三重),进而得到合适的赛贝克系数。x=0.20时Cu2Sn0.8In0.2S3的功率因子在673 K时达到0.75 mW/(m·K2)。随着In掺杂量的增大,Cu2SnS3的晶体结构从有序的单斜相向无序的立方相和四方相结构转变,有效地抑制声子传播。利用理论最低晶格热导和Wiedemann-Franz定律计算的电子热导估算量纲为1的热电优值(ZT),在673 K时Cu2Sn0.8Zn0.2S3ZT高达0.8,显示Cu2SnS3作为新型环保型热电材料的巨大潜力。
Abstract:
Dense bulk ceramics Cu2Sn1-xInxS3 of p-type In doping Cu2SnS3 were prepared by solid state reaction and investigated for structural and electrical transport properties.In-doping at the Sn-site markedly improved the electrical conductivity by implanting holes,with a modest Seebeck coefficient as favored by the triply degenerate state of valence band maximum.A maximum power factor of 0.75 mW/(m·K2)was obtained with x=0.20 of Cu2Sn0.8In0.2S3.The crystal structure of Cu2SnS3 transformed from original monoclinic to tetragonal via cubic symmetry with increasing amount of In,leading to an ordered-disordered change of the cations’ arrangement which would suppress the phonon transport effectively.A high ZT of 0.8 of Cu2Sn0.8In0.2S3 at 673 K was predicted by using the estimated total thermal conductivity based on a theoretical minimum lattice contribution and the Wiedemann-Franz relation,suggesting a great potential of Cu2SnS3 as an ecofriendly thermoelectric candidate.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-02-27
基金项目:国家自然科学基金(51272103); 江苏高校优势学科建设工程
作者简介:沈亚伟(1991—),男,江苏南通人,硕士,主要研究方向为热电半导体材料; 王一峰(联系人),教授,E-mail:yifeng.wang@njtech.edu.cn.
引用本文:沈亚伟,潘林,王一峰.In掺杂对Cu2SnS3结构和电输运性能的影响[J].南京工业大学学报(自然科学版),2017,39(3):21-25..
更新日期/Last Update: 2017-05-31