Thermoelectric study of Zn-doped n-type AgIn5Se8: Hopping and band electrical conduction along with low lattice thermal conduction in diamond-like structure

doi:10.1016/j.jallcom.2019.07.005

	Thermoelectric study of Zn-doped n-type AgIn5Se8: Hopping and band electrical conduction along with low lattice thermal conduction in diamond-like structure
	Shen, Xingchen 5,6,7; Wang, Guiwen 2; Li, Shulong 3; Yang, Chun-Chuen 4; Tan, Huan 7; Zhang, Yumeng 7; Lu, Xu 7; He, Jian 5; Wang, Guoyu1,6 ; Zhou, Xiaoyuan 2,7
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-10-15
卷号	805 页码:444-453
关键词	n-type Diamond-like structure Lattice dynamics Variable hopping conduction Band conduction Thermoelectric
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.07.005
通讯作者	Wang, Guoyu(guoyuw@cigit.ac.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要	The diamond-like structured compounds with intrinsically low lattice thermal conductivity form a class of promising thermoelectric materials. Despite the stride of developing high performance p-type diamond-like materials, the report of thermoelectric study of n-type diamond-like materials is scarce. Here, we report thermoelectric study of Zn-doped n-type AgIn5Se8 with the emphases on the underlying mechanism of electrical conduction and low lattice thermal conductivity. Specifically, we found that 1) the low lattice thermal conductivity was related to the low speed of sound, low-energy Einstein modes arising from the weak Ag1-Se2 and In2-Se1 bonds, and anharmonicity arising from the distorted Se1-In2-Se1 tetrahedra at high temperatures; 2) a temperature-driven transition occurred in the electrical conduction from variable range hopping (VRH) to band conduction; 3) Zn doping regulated the carrier concentration and enhanced the electronic density of states, thereby yielding a zT value of 0.60 at 880 K in the 2% Zn-doped AgIn5Se8 sample. The derived zT value is promising among the n-type diamond-like structured compounds. (C) 2019 Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[51472036] ; Fundamental Research Funds for the Central Universities[106112017CDJQJ308821] ; Fundamental Research Funds for the Central Universities[2018CDYJSY0055] ; CSC scholarship[201806050180] ; Graduate Scientific Research and Innovation Foundation of Chongqing, China[CYB 19064] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2015JCYJBX0026] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2017JCYJAX0388] ; 2019 ITS Summer Fellowship
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000482184100048
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9590]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Wang, Guoyu; Zhou, Xiaoyuan
作者单位	1.Univ Chinese Acad Sci, Beijing 100190, Peoples R China 2.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China 3.Southwest Jiaotong Univ, Superconduct & New Energy R&D Ctr, Key Lab Magnet Levitat Technol & Maglev Trains, Minist Educ, Chengdu 610031, Sichuan, Peoples R China 4.Chung Yuan Christian Univ, Dept Phys, Taoyuan 32023, Taiwan 5.Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA 6.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 7.Chongqing Univ, Coll Phys, Chongqing Key Lab Soft Condensed Matter Phys & Sm, Chongqing 401331, Peoples R China
推荐引用方式 GB/T 7714	Shen, Xingchen,Wang, Guiwen,Li, Shulong,et al. Thermoelectric study of Zn-doped n-type AgIn5Se8: Hopping and band electrical conduction along with low lattice thermal conduction in diamond-like structure[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,805:444-453.
APA	Shen, Xingchen.,Wang, Guiwen.,Li, Shulong.,Yang, Chun-Chuen.,Tan, Huan.,...&Zhou, Xiaoyuan.(2019).Thermoelectric study of Zn-doped n-type AgIn5Se8: Hopping and band electrical conduction along with low lattice thermal conduction in diamond-like structure.JOURNAL OF ALLOYS AND COMPOUNDS,805,444-453.
MLA	Shen, Xingchen,et al."Thermoelectric study of Zn-doped n-type AgIn5Se8: Hopping and band electrical conduction along with low lattice thermal conduction in diamond-like structure".JOURNAL OF ALLOYS AND COMPOUNDS 805(2019):444-453.