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Enhanced Thermoelectric Performance of Quaternary Cu2-2xAg2xSe1-xSx Liquid-like Chalcogenides
Guan, Mengjia; Zhao, Kunpeng; Qiu, Pengfei; Ren, Dudi; Shi, Xun; Chen, Lidong
2019-04-10
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:14Pages:13433
SubtypeArticle
AbstractLiquid-like binary Cu2-delta X (X = S, Se, and Te) chalcogenides and their ternary solid solutions have gained notable attention in thermoelectrics due to their interesting and abnormal thermal and electrical transport properties. However, previous studies mainly focus on a single element alloying at either an anion or cation site whereas the investigation on cation/anion co-alloying is very rare so far. Here, a series of quaternary Cu2-2xAg2xSe1-xSx (x = 0.01, 0.03, 0.05, 0.1, 0.15) liquid-like copper chalcogenide materials have been fabricated and the effects of Ag/S co-alloying on the thermoelectric properties of Cu2Se have been systematically studied. It is found that all compounds are mixed phases at room temperature but single cubic phase at high temperatures. The introduction of Ag and S in Cu2Se brings about a large mass fluctuation rather than strain field fluctuation that effectively suppresses the lattice thermal conductivity. Furthermore, on increasing the Ag and S contents, the high electrical conductivity of pristine Cu2Se is well tuned to the optimal range derived from the single parabolic band model analysis. Consequently, a peak zT of 1.6 at 900 K is achieved in Cu1.8Ag0.2Se0.9S0.1, which is about 33% higher than that of binary Cu2Se.
Keywordthermoelectric liquidlike coalloying chalcogenides mass fluctuation
DOI10.1021/acsami.9b01643
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27196
Collection中国科学院上海硅酸盐研究所
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GB/T 7714
Guan, Mengjia,Zhao, Kunpeng,Qiu, Pengfei,et al. Enhanced Thermoelectric Performance of Quaternary Cu2-2xAg2xSe1-xSx Liquid-like Chalcogenides[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(14):13433.
APA Guan, Mengjia,Zhao, Kunpeng,Qiu, Pengfei,Ren, Dudi,Shi, Xun,&Chen, Lidong.(2019).Enhanced Thermoelectric Performance of Quaternary Cu2-2xAg2xSe1-xSx Liquid-like Chalcogenides.ACS APPLIED MATERIALS & INTERFACES,11(14),13433.
MLA Guan, Mengjia,et al."Enhanced Thermoelectric Performance of Quaternary Cu2-2xAg2xSe1-xSx Liquid-like Chalcogenides".ACS APPLIED MATERIALS & INTERFACES 11.14(2019):13433.
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