Journal ArticleDOI
Synthesis, Crystal and Electronic Structures, and Thermoelectric Properties of the Novel Cluster Compound Ag3In2Mo15Se19
Patrick Gougeon,Philippe Gall,Rabih Al Rahal Al Orabi,Bruno Fontaine,Régis Gautier,Michel Potel,Tong Zhou,Bertrand Lenoir,Malika Colin,Christophe Candolfi,Anne Dauscher +10 more
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TLDR
In this article, a compound Ag3In2Mo15Se19 was synthesized by solid-state reaction in a sealed molybdenum crucible at 1300 °C.Abstract:
Polycrystalline samples and single crystals of the new compound Ag3In2Mo15Se19 were synthesized by solid-state reaction in a sealed molybdenum crucible at 1300 °C. Its crystal structure (space group R3c, a = 9.9755(1) A, c = 57.2943(9) A, and Z = 6) was determined from single-crystal X-ray diffraction data and constitutes an Ag-filled variant of the In2Mo15Se19 structure-type containing octahedral Mo6 and bioctahedral Mo9 clusters in a 1:1 ratio. The increase of the cationic charge transfer due to the Ag insertion induces a modification of the Mo–Mo distances within the Mo clusters that is discussed with regard to the electronic structure. Transport properties were measured in a broad temperature range (2–1000 K) to assess the thermoelectric potential of this compound. The transport data indicate an electrical conduction dominated by electrons below 25 K and by holes above this temperature. The metallic character of the transport properties in this material is consistent with electronic band structure ca...read more
Citations
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Journal ArticleDOI
Assessment of the thermoelectric performance of polycrystalline p-type SnSe
S. Sassi,Christophe Candolfi,Jean-Baptiste Vaney,V. Ohorodniichuk,Philippe Masschelein,Anne Dauscher,Bertrand Lenoir +6 more
TL;DR: In this article, the authors evaluated the thermoelectric performance of polycrystalline p-type SnSe, a material in which unprecedented values of the thermoclectric figure of merit ZT have been recently discovered in single crystals.
Journal ArticleDOI
Studies on thermoelectric figure of merit of Na-doped p-type polycrystalline SnSe
TL;DR: In this article, a room temperature carrier concentration of ∼2.7 × 1019 cm−3 was obtained in 2 atm% Na-doped SnSe samples with the highest power factor obtained in 1.5 atm % Na doping.
Journal ArticleDOI
From crystal to glass-like thermal conductivity in crystalline minerals
Y. Bouyrie,Christophe Candolfi,Stéphane Pailhès,Michael Marek Koza,Bernard Malaman,Anne Dauscher,Janusz Tobola,O. Boisron,Lucien Saviot,Bertrand Lenoir +9 more
TL;DR: The mechanism in which glass-like thermal conductivity emerges in tetrahedrites, a family of natural minerals extensively studied in geology and, more recently, in thermoelectricity, is unveiled.
Journal ArticleDOI
Ultralow Lattice Thermal Conductivity and Enhanced Thermoelectric Performance in SnTe:Ga Materials
Rabih Al Rahal Al Orabi,Rabih Al Rahal Al Orabi,Junphil Hwang,Chan Chieh Lin,Régis Gautier,Bruno Fontaine,Woochul Kim,Jong-Soo Rhyee,Daehyun Wee,Marco Fornari +9 more
TL;DR: In this paper, it was shown that Ga-doping in SnTe may lower the lattice thermal conduction slightly below the theoretical amorphous minimum at high temperature. But this effect was not justified by the spontaneous formation of nanoprecipitates as GaTe.
Journal ArticleDOI
Crystal structure, electronic band structure and high-temperature thermoelectric properties of Te-substituted tetrahedrites Cu12Sb4−xTexS13 (0.5 ≤ x ≤ 2.0)
Y. Bouyrie,Christophe Candolfi,V. Ohorodniichuk,Bernard Malaman,Anne Dauscher,Janusz Tobola,Bertrand Lenoir +6 more
TL;DR: In this article, the tetrahedrite phase Cu12Sb4−xTexS13 with nominal compositions 0.5 ≤ x ≤ 2.0 were synthesized by two different synthesis routes: from precursors and from direct melting of elements.
References
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Book
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