中国科学院重庆绿色智能技术研究院机构知识库

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	Synergistically optimized thermoelectric properties of Ag1+xIn5Se8 alloys
	Shen, Xingchen1,2; Zhang, Bin3; Chen, Qiuyi1; Tan, Huan1; Zhang, Xiao3; Wang, Guoyu2,4; Lu, Xu1; Zhou, Xiaoyuan1,3
	2019-12-01
摘要	The AgIn5Se8 diamond-like compound with low thermal conductivity is deemed to be a promising thermoelectric material, but its performance is limited by its low electrical conductivity. Herein, we report an effective method to increase the maximum and average zT values of AgIn5Se8-based compounds by adding excess Ag. All the samples exhibit increased carrier concentrations of similar to 10(18) cm(-3) at ambient temperature, leading to considerably enhanced electrical conductivity. Meanwhile, the excess Ag creates numerous point defects, twin boundaries and stacking faults, which serve as the internal-strain field to induce additional phonon scattering and lattice softening to lower the lattice thermal conductivity. The synergistic strategy yields a peak zT value of 0.67 at 883 K and an average zT value of 0.34 from 323 to 883 K for Ag1.03In5Se8.
DOI	10.1039/c9qi01054h
发表期刊	INORGANIC CHEMISTRY FRONTIERS
ISSN	2052-1553
卷号	6期号:12页码:3545-3553
通讯作者	Wang, Guoyu(guoyuw@cigit.ac.cn) ; Lu, Xu(luxu@cqu.edu.cn)
收录类别	SCI
WOS记录号	WOS:000501285400014
语种	英语