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题名: High Thermoelectric Performance of New Rhombohedral Phase of GeSe stabilized through Alloying with AgSbSe2
作者: Huang, Zhiwei1, 2;  Miller, Samuel A.3;  Ge, Binghui4;  Yan, Mingtao1, 2;  Anand, Shashwat3;  Wu, Tianmin5;  Nan, Pengfei6;  Zhu, Yuanhu1;  Zhuang, Wei5;  Snyder, G. Jeffrey3;  Jiang, Peng1;  Bao, Xinhe1
关键词: high-entropy alloying ;  co-doping ;  energy conversion ;  GeSe ;  thermoelectrics
刊名: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
发表日期: 2017-11-06
DOI: 10.1002/ange.201708134
卷: 56, 期:45, 页:14113-14118
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: GeSe is a IV-VI semiconductor, like the excellent thermoelectric materials PbTe and SnSe. Orthorhombic GeSe has been predicted theoretically to have good thermoelectric performance but is difficult to dope experimentally. Like PbTe, rhombohedral GeTe has a multivalley band structure, which is ideal for thermoelectrics and also promotes the formation of Ge vacancies to provide enough carriers for electrical transport. Herein, we investigate the thermoelectric properties of GeSe alloyed with AgSbSe2, which stabilizes a new rhombohedral structure with higher symmetry that leads to a multivalley Fermi surface and a dramatic increase in carrier concentration. The zT of GeAg0.2Sb0.2Se1.4 reaches 0.86 at 710 K, which is 18 times higher than that of pristine GeSe and over four times higher than doped orthorhombic GeSe. Our results open a new avenue towards developing novel thermoelectric materials through crystal phase engineering using a strategy of entropy stabilization of high-symmetry alloys.
关键词[WOS]: DRUG-DELIVERY ;  NANOPARTICLES ;  DOXORUBICIN ;  VACCINATION ;  MEMBRANES ;  TOXINS ;  SAFE
语种: 英语
WOS记录号: WOS:000413896400035
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149678
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Excellence Nanosci Inst, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Northwestern Univ, Mat Sci & Engn Dept, Evanston, IL 60208 USA
4.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
6.Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China

Recommended Citation:
Huang, Zhiwei,Miller, Samuel A.,Ge, Binghui,et al. High Thermoelectric Performance of New Rhombohedral Phase of GeSe stabilized through Alloying with AgSbSe2[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2017,56(45):14113-14118.
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