CdI2 structure type as potential thermoelectric materials: Synthesis and high temperature thermoelectric properties of the solid solution TiSxSe2−x

Gascoin, Franck; Nunna, Raghavendra; Guilmeau, Emmanuel; Bréard, Yohann

doi:10.1016/j.jallcom.2012.01.067

Cited by 35 publications

(36 citation statements)

References 33 publications

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“…In the case of TiS 2 -based layered sulfides, a single crystal can be grown using the chemical-vapor-transport method with I 2 as the transport agent [38,39,40,41]. Polycrystalline TiS 2 -based layered sulfides have been commonly prepared by melting stoichiometric amounts of the constituent elements in evacuated and sealed quartz tubes at 905–1273 K, followed by pressurized sintering at 873–1173 K [30,42,43,44,45,46,47]. However, these methods are difficult to apply because of the large difference in vapor pressure between metals and sulfur; consequently, there is less motivation for researchers in the thermoelectric community to investigate thermoelectric sulfides further.…”

Section: Cs2 Sulfurization and Pressurized Sinteringmentioning

confidence: 99%

“…Because TiS 2 -based layered sulfides are primarily composed of earth-abundant, low-toxicity, and light elements, they will pave the way for environment-friendly, cost-effective, and lightweight thermoelectric devices [29,30,39,40,41,42,43,44,45,46,47,56,57,58,59,60,61,62,63,64,65,66]. The two-dimensional crystal structure of these systems is a great example in which the thermoelectric performance can be improved through nanoblock integration and hierarchical architecturing.…”

Section: Tis2-based Layered Sulfidesmentioning

confidence: 99%

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Hierarchical Architecturing for Layered Thermoelectric Sulfides and Chalcogenides

Jood

Ohta

2015

Materials

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Sulfides are promising candidates for environment-friendly and cost-effective thermoelectric materials. In this article, we review the recent progress in all-length-scale hierarchical architecturing for sulfides and chalcogenides, highlighting the key strategies used to enhance their thermoelectric performance. We primarily focus on TiS2-based layered sulfides, misfit layered sulfides, homologous chalcogenides, accordion-like layered Sn chalcogenides, and thermoelectric minerals. CS2 sulfurization is an appropriate method for preparing sulfide thermoelectric materials. At the atomic scale, the intercalation of guest atoms/layers into host crystal layers, crystal-structural evolution enabled by the homologous series, and low-energy atomic vibration effectively scatter phonons, resulting in a reduced lattice thermal conductivity. At the nanoscale, stacking faults further reduce the lattice thermal conductivity. At the microscale, the highly oriented microtexture allows high carrier mobility in the in-plane direction, leading to a high thermoelectric power factor.

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Section: Cs2 Sulfurization and Pressurized Sinteringmentioning

confidence: 99%

Section: Tis2-based Layered Sulfidesmentioning

confidence: 99%

Hierarchical Architecturing for Layered Thermoelectric Sulfides and Chalcogenides

Jood

Ohta

2015

Materials

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“…intercalated titanium diselenide. [3][4] In this work we are reporting thermal transport properties of Sr x TiSe 2 in the temperature range of 20-350 o C. Significant reduction in thermal conductivity with increasing Sr content has been observed.…”

Section: Introductionmentioning

confidence: 95%

Thermal transport properties of strontium intercalated titanium diselenide

Patel¹,

Bhatt²,

Bhattacharya³

et al. 2013

AIP Conference Proceedings

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Polycrystalline Sr x TiSe 2 (x= 0.04, 0.14, 0.2) alloy was prepared using solid state reaction method and hot press sintering. The effects Sr content were studied on the thermal transport properties of the material. As grown material shows pure TiSe 2 phase. Increasing the strontium content reduces thermal conductivity of the material. This is attributed to large number of interfaces and weakly bound Sr atom which acts like a phonon scatterer.

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“…Recently, we reported on the thermoelectric properties of solid solutions of TiS x Se 2Àx [9]. This work revealed that, along the full solid solution, the transport properties vary from the rather metallic and p-type character of TiSe 2 to the semi-metallic and n-type TiS 2 .…”

Section: Introductionmentioning

confidence: 98%

“…Indeed, as the layer and the interlayer spacing can often be modified independently, the possibility to transform and hopefully tune adequately the electronic and thermal transport properties is real. For instance, this has been proven in layered compounds crystallizing in the CaAl 2 Si 2 structure type [1][2][3][4][5], in the CdI 2 type structures [6][7][8][9], or in the parent misfits compounds [11][12][13]. The study of these layered compounds have shown that it is possible to somewhat decouple the thermal and electronic properties as, in a simple view, the crystalline layers primarily conduct the charge carriers whereas the thermal transport is mainly affected by the content of the interlayer spacing.…”

Section: Introductionmentioning

confidence: 99%