Remarkable electron and phonon band structures lead to a high thermoelectric performance ZT > 1 in earth-abundant and eco-friendly SnS crystals

2018 ◽  
Vol 6 (21) ◽  
pp. 10048-10056 ◽  
Author(s):  
Wenke He ◽  
Dongyang Wang ◽  
Jin-Feng Dong ◽  
Yang Qiu ◽  
Liangwei Fu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Electrical Transport ◽  
Figure Of Merit ◽  
Thermoelectric Performance ◽  
Electrical Transport Properties ◽  
Band Structures ◽  
Low Thermal Conductivity ◽  
Earth Abundant ◽  
High Figure

Enhanced electrical transport properties and low thermal conductivity lead to high figure of merit (ZT) over the whole temperature range in Na-doped SnS crystals.

High thermoelectric performance of superionic argyrodite compound Ag8SnSe6

2016 ◽  
Vol 4 (24) ◽  
pp. 5806-5813 ◽  
Author(s):  
Lin Li ◽  
Yuan Liu ◽  
Jiyan Dai ◽  
Aijun Hong ◽  
Min Zeng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Power Factor ◽  
High Power ◽  
Figure Of Merit ◽  
Environmentally Friendly ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity ◽  
High Power Factor ◽  
High Figure

A good thermoelectric material usually has a high power factor and low thermal conductivity for high figure of merit (ZT), and is also environmentally friendly and economical.

scholarly journals Highly Textured N-Type SnSe Polycrystals with Enhanced Thermoelectric Performance

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Peng-Peng Shang ◽  
Jinfeng Dong ◽  
Jun Pei ◽  
Fu-Hua Sun ◽  
Yu Pan ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Electrical Transport ◽  
High Performance ◽  
Waste Heat ◽  
Thermoelectric Performance ◽  
Electrical Transport Properties ◽  
Anisotropic Thermal Conductivity ◽  
Out Of Plane ◽  
Thermoelectric Transport Properties

Thermoelectric materials, which directly convert heat into electricity based on the Seebeck effects, have long been investigated for use in semiconductor refrigeration or waste heat recovery. Among them, SnSe has attracted significant attention due to its promising performance in both p-type and n-type crystals; in particular, a higher out-of-plane ZT value could be achieved in n-type SnSe due to its 3D charge and 2D phonon transports. In this work, the thermoelectric transport properties of n-type polycrystalline SnSe were investigated with an emphasis on the out-of-plane transport through producing textural microstructure. The textures were fabricated using mechanical alloying and repeated spark plasma sintering (SPS), as a kind of hot pressing, aimed at producing strong anisotropic transports in n-type polycrystalline SnSe as that in crystalline SnSe. Results show that the lowest thermal conductivity of 0.36 Wm-1 K-1 was obtained at 783 K in perpendicular to texture direction. Interestingly, the electrical transport properties are less anisotropic and even nearly isotropic, and the power factors reach 681.3 μWm-1 K-2 at 783 K along both parallel and perpendicular directions. The combination of large isotropic power factor and low anisotropic thermal conductivity leads to a maximum ZT of 1.5 at 783 K. The high performance elucidates the outstanding electrical and thermal transport behaviors in n-type polycrystalline SnSe, and a higher thermoelectric performance can be expected with future optimizing texture in n-type polycrystalline SnSe.

Designing Si/Si1−xGex Superlattices With Tailored Thermal Transport Properties

2008 ◽  
Author(s):  
E. S. Landry ◽  
A. J. H. McGaughey
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Transport Properties ◽  
Electrical Transport ◽  
Design Space ◽  
Phonon Transport ◽  
Atomistic Modeling ◽  
Electrical Transport Properties ◽  
Modeling Tools ◽  
Thermoelectric Energy

Si/Si1−xGex superlattices are promising candidates for thermoelectric energy conversion applications [1, 2], as the phonon transport through them can be inhibited while maintaining desirable electrical transport properties. No comprehensive experimental study has been performed to map the thermal conductivity design space accessible by Si/Ge nanocomposites. By using atomistic modeling tools, interesting areas of the design space can be identified and then further explored experimentally.

Reinvestigation the Thermal and Electrical Transport Properties of Tl7Sb2

2013 ◽  
Vol 802 ◽  
pp. 284-288
Author(s):  
Anek Charoenphakdee ◽  
Adul Harnwangmuang ◽  
Tosawat Seetawan ◽  
Chesta Ruttanapun ◽  
Vittaya Amornkitbamrung ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Electrical Transport ◽  
Room Temperature ◽  
Lattice Parameter ◽  
Electronic Contribution ◽  
Electrical Transport Properties ◽  
Space Group ◽  
Crystal System ◽  
Thallium Compounds

The authors examined the thermal and electrical transport properties of Tl7Sb2 at temperatures ranging from room temperature to 400 K. The crystal system of Tl7Sb2 is cubic with the lattice parameter a = 1.16053 nm and the space group is Im3m. The polycrystalline samples were prepared by melting stoichiometric amounts of thallium and antimony. Although, usually the thermal conductivity of thallium compounds is very low (<1 Wm-1K-1), that of Tl7Sb2 was relatively high (~13 Wm-1K-1 at room temperature). This is because of the large electronic contribution to the thermal conductivity.

Low thermal conductivity and high figure of merit for rapidly synthesized n-type Pb1−xBixTe alloys

2018 ◽  
Vol 47 (44) ◽  
pp. 15957-15966 ◽  
Author(s):  
Tingting Chen ◽  
Hongchao Wang ◽  
Wenbin Su ◽  
Fahad Mehmood ◽  
Teng Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Low Temperature ◽  
Figure Of Merit ◽  
Low Thermal Conductivity ◽  
High Figure

High zTs of Pb1−xBixTe alloys rapidly synthesized at low temperature in this study are comparable to those from conventional melting synthesis.

scholarly journals Realization of higher thermoelectric performance by dynamic doping of copper in n-type PbTe

2019 ◽  
Vol 12 (10) ◽  
pp. 3089-3098 ◽  
Author(s):  
Li You ◽  
Jiye Zhang ◽  
Shanshan Pan ◽  
Ying Jiang ◽  
Ke Wang ◽  
...  
Keyword(s):  
Transport Properties ◽  
Electrical Transport ◽  
Thermoelectric Performance ◽  
Doping Effect ◽  
Electrical Transport Properties ◽  
Temperature Dependent

A nearly perfect dynamic doping effect is realized in PbTe through Cu intercalation, resulting in fully optimized temperature-dependent electrical-transport properties.

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