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High-efficiency thermoelectric Ba8Cu14Ge6P26: bridging the gap between tetrel-based and tetrel-free clathrates

TitleHigh-efficiency thermoelectric Ba8Cu14Ge6P26: bridging the gap between tetrel-based and tetrel-free clathrates
Publication TypeJournal Article
Year of Publication2017
AuthorsWang, J, Lebedev, OI, Lee, K, Dolyniuk, JA, Klavins, P, Bux, S, Kovnir, K
JournalChemical Science
Volume8
Pagination8030-8038
Date Published12
Type of ArticleArticle
ISBN Number2041-6520
Accession NumberWOS:000415877000019
Keywordsba8cu16p30, chemistry, crystal-structures, i type, performance, physical-properties, power-generation, structural-characterization, superstructure, thermal-conductivity, yb14mn1-xalxsb11
Abstract

.63 at 812 K due to a high power factor of 5.62 mu W cm(-1) K-2. The thermoelectric efficiency of Ba8Cu14Ge6P26 is on par with the best optimized p-type Ge-based clathrates and outperforms the majority of clathrates in the 700-850 K temperature region, including all tetrel-free clathrates. Ba8Cu14Ge6P26 expands clathrate chemistry by bridging conventional tetrel-based and tetrel-free clathrates. Advanced transport properties, in combination with earth-abundant framework elements and congruent melting make Ba8Cu14Ge6P26 a strong candidate as a novel and efficient thermoelectric material.

DOI10.1039/c7sc03482b
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