Crystal structure and mechanical properties of spark plasma sintered Cu2Se: An efficient photovoltaic and thermoelectric material

Tyagi, Kriti; Gahtori, Bhasker; Bathula, Sivaiah; Jayasimhadri, M.; Sharma, Sakshi; Singh, Niraj K.; Haranath, D.; Srivastava, Avanish Kumar

doi:10.1016/j.ssc.2015.02.004

Cited by 58 publications

(33 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The compatibility factor of the assynthesized SnSe was found to be 0.68 at 773 K [90]. Because compatibility factor for any given material should be less than 2 to ensure a better power output, the value of 0.68 is also comparable to the other thermoelectric materials, such as Cu 2 Se [154] and half-hausler alloys [155]. The thermal shock resistance is another essential parameter during the actual operation of the device.…”

Section: Mechanical Propertiesmentioning

confidence: 98%

High-performance SnSe thermoelectric materials: Progress and future challenge

Chen

Zhao

Zou

2018

Progress in Materials Science

460

410

View full text Add to dashboard Cite

Thermoelectric materials offer an alternative opportunity to tackle the energy crisis and environmental problems by enabling the direct solid-state energy conversion. As a promising candidate with full potentials for the next generation thermoelectrics, tin selenide (SnSe) and its associated thermoelectric materials have been attracted extensive attentions due to their ultralow thermal conductivity and high electrical transport performance (power factor). To provide a thorough overview of recent advances in SnSe-based thermoelectric materials that have been revealed as promising thermoelectric materials since 2014, here, we first focus on the inherent relationship between the structural characteristics and the supreme thermoelectric performance of SnSe, including the thermodynamics, crystal structures, and electronic structures. The effects of phonon scattering, pressure or strain, and oxidation behavior on the thermoelectric performance of SnSe are discussed in detail. Besides, we summarize the current theoretical calculations to predict and understand the thermoelectric performance of SnSe, and provide a comprehensive summary on the current synthesis, characterization, and thermoelectric performance of both SnSe crystals and polycrystals, and their associated materials. In the end, we point out the controversies, challenges and strategies toward future enhancements of the SnSe thermoelectric materials.

show abstract

Section: Mechanical Propertiesmentioning

confidence: 98%

High-performance SnSe thermoelectric materials: Progress and future challenge

Chen

Zhao

Zou

2018

Progress in Materials Science

460

410

View full text Add to dashboard Cite

show abstract

“…Zhao et al found the Vickers hardness of Cu 2 Se is ≈0.45 GPa, and the Vickers hardness of Cu 2 S or/Cu 1.97 S is ≈1.0 GPa . Tyagi et al measured the fracture toughness of Cu 2 Se being ≈2 ± 0.02 MPa m −1/2 , and the compressive strength being ≈45 MPa with ≈3% plastic strain. The mechanical properties indicate Cu 2 Se and Cu 2 S are physically stable for thermoelectric applications .…”

Section: Device and Challengementioning

confidence: 99%

“…The mechanical properties indicate Cu 2 Se and Cu 2 S are physically stable for thermoelectric applications . Additionally, the mechanical properties can be further improved by material‐engineering methods, such as nanoengineering …”

Section: Device and Challengementioning

confidence: 99%

Promising and Eco‐Friendly Cu₂X‐Based Thermoelectric Materials: Progress and Applications

et al. 2020

View full text Add to dashboard Cite

Due to the nature of their liquid‐like behavior and high dimensionless figure of merit, Cu2X (X = Te, Se, and S)‐based thermoelectric materials have attracted extensive attention. The superionicity and Cu disorder at the high temperature can dramatically affect the electronic structure of Cu2X and in turn result in temperature‐dependent carrier‐transport properties. Here, the effective strategies in enhancing the thermoelectric performance of Cu2X‐based thermoelectric materials are summarized, in which the proper optimization of carrier concentration and minimization of the lattice thermal conductivity are the main focus. Then, the stabilities, mechanical properties, and module assembly of Cu2X‐based thermoelectric materials are investigated. Finally, the future directions for further improving the energy conversion efficiency of Cu2X‐based thermoelectric materials are highlighted.

show abstract

“…8 reported for other state-of-the-art TE materials [29,30,32,34,35,52], but are lower than those reported by the authors for n-type Si 80 Ge 20 nanostructured alloys [29,30].…”

Section: Accepted Manuscriptmentioning

confidence: 56%

“…This nanostructured alloy exhibited a hardness of ~ 9 ± 0. alloy compared with other state-of-the-art thermoelectric materials, such as Bi 2 Te 3 , [33] Bi 2 Te 3 +0.1Vol.%SiC [33],LAST [78], Bi 0.5 Sb 1.5 Te 3 +0.2Vol.%B 4 C [79], PbTe+PbS [80], Cu 3 SbSe 3 and Cu 3 SbSe 4 [34], Cu 2 Se [52], Co 4 Sb 12 [35], In 0.1 Co 4 Sb 12 [35], n-type nanostructured Si 80 Ge 20 alloys [29,30]. [36], PbTe [36] and ntype nanostructured Si 80 Ge 20 alloy [29].…”

Section: Discussionmentioning

confidence: 99%

Mechanical properties and microstructure of spark plasma sintered nanostructured p-type SiGe thermoelectric alloys

2015

Self Cite

View full text Add to dashboard Cite

Please cite this article as: Sivaiah Bathula, M. Jayasimhadri, Ajay Dhar, Mechanical properties and microstructure of spark plasma sintered nanostructured p-type SiGe thermoelectric alloys, (2015), AbstractSiGe based thermoelectric (TE) materials have been employed for the past four decades for power generation in Radio-isotope thermoelectric generators (RTG). Recently "nanostructuring" has resulted in significantly increasing the figure-of-merit (ZT) of both n and p-type of SiGe and thus nanostructured Si 80 Ge 20 alloys are evolving as a potential replacement for their conventional bulk counterparts in designing efficient RTGs. However, apart from ZT, their mechanical properties are equally important for the long term reliability of their TE modules. Thus, we report the mechanical properties of p-type nanostructured Si 80 Ge 20 alloys, which were synthesized employing spark plasma sintering of mechanically alloyed nanopowders of its constituent elements with 1.2% boron doping. Nanostructured p-type Si 80 Ge 20 alloys exhibited a hardness of ~9 ± 0.1 GPa, an elastic modulus of ~135 ± 1.9 GPa, a compressive strength of 108 ± 0.2 MPa, fracture toughness of ~1.66 ± 0.04 MPa√m with a thermal shock resistance value of 391 ± 21 Wm -1 . This combination of good mechanical properties coupled with higher reported ZT of nanostructured p-type Si 80 Ge 20 alloys are render it to be a potential material for power generation applications, compared to its bulk counterpart.

show abstract

Crystal structure and mechanical properties of spark plasma sintered Cu2Se: An efficient photovoltaic and thermoelectric material

Cited by 58 publications

References 45 publications

High-performance SnSe thermoelectric materials: Progress and future challenge

High-performance SnSe thermoelectric materials: Progress and future challenge

Promising and Eco‐Friendly Cu₂X‐Based Thermoelectric Materials: Progress and Applications

Mechanical properties and microstructure of spark plasma sintered nanostructured p-type SiGe thermoelectric alloys

Contact Info

Product

Resources

About

Crystal structure and mechanical properties of spark plasma sintered Cu2Se: An efficient photovoltaic and thermoelectric material

Cited by 58 publications

References 45 publications

High-performance SnSe thermoelectric materials: Progress and future challenge

High-performance SnSe thermoelectric materials: Progress and future challenge

Promising and Eco‐Friendly Cu2X‐Based Thermoelectric Materials: Progress and Applications

Mechanical properties and microstructure of spark plasma sintered nanostructured p-type SiGe thermoelectric alloys

Contact Info

Product

Resources

About

Promising and Eco‐Friendly Cu₂X‐Based Thermoelectric Materials: Progress and Applications