The ultralow thermal conductivity of Cs2SnI6 by filling interstitial voids with Mg2+ ions

doi:10.1063/5.0244660

	The ultralow thermal conductivity of Cs₂SnI₆ by filling interstitial voids with Mg²⁺ ions
	Xiao, Xianfeng1,2 ; Liang, Ziqi 3; Yao, Qin 1; Chen, Lidong 1
	2024-12-14
发表期刊	JOURNAL OF APPLIED PHYSICS (IF:2.7[JCR-2023],2.6[5-Year])
ISSN	0021-8979
EISSN	1089-7550
卷号	136 期号:22
DOI	10.1063/5.0244660
摘要	Metal halide perovskites (MHPs) have received considerable attention due to their intrinsically disordered structures, leading to abnormally low thermal conductivity, which is beneficial for energy harvesting applications. Compared with organic-inorganic hybrid MHPs, all inorganic MHPs exhibit better thermal stability, but thermal conductivity is relatively high, about twice that of hybrid MHPs. In this study, we investigate an all-inorganic vacancy-ordered double perovskite, Cs2SnI6, characterized by a cage-like structure with an octahedral interstitial radius of approximately 1.638 & Aring;, allowing for the accommodation of various metal ions. We successfully introduced Mg2+ ions as guest fillers into the octahedral interstices of Cs2SnI6. The weak ionic bonds formed by Mg2+ in these oversized interstices induce vibrations that enhance atomic disorder and anharmonicity within the structure. As a result, we achieved an exceptionally low thermal conductivity of kappa = 0.11 W m(-1) K-1 at room temperature in Mg0.102Cs2SnI6, representing a 21% reduction compared to the undoped sample and marking one of the lowest values reported for MHPs. This research offers a novel approach to effectively regulate disorder and significantly reduce the thermal conductivity of all-inorganic MHPs. (c) 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license(https://creativecommons.org/licenses/by/4.0/).https://doi.org/10.1063/5.0244660
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收录类别	SCI ; EI
语种	英语
资助项目	null[52072391] ; null[U23A20685]
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:001379191200002
出版者	AIP Publishing
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/461510
专题	物质科学与技术学院物质科学与技术学院_博士生
通讯作者	Yao, Qin
作者单位	1.State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China; 2.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 3.Department of Materials Science, Fudan University Shanghai, Shanghai; 200433, China
第一作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Xiao, Xianfeng,Liang, Ziqi,Yao, Qin,et al. The ultralow thermal conductivity of Cs₂SnI₆ by filling interstitial voids with Mg²⁺ ions[J]. JOURNAL OF APPLIED PHYSICS,2024,136(22).
APA	Xiao, Xianfeng,Liang, Ziqi,Yao, Qin,&Chen, Lidong.(2024).The ultralow thermal conductivity of Cs₂SnI₆ by filling interstitial voids with Mg²⁺ ions.JOURNAL OF APPLIED PHYSICS,136(22).
MLA	Xiao, Xianfeng,et al."The ultralow thermal conductivity of Cs₂SnI₆ by filling interstitial voids with Mg²⁺ ions".JOURNAL OF APPLIED PHYSICS 136.22(2024).