High thermoelectric performance in low-cost SnS0.91Se0.09 crystals

Science ◽  
2019 ◽  
Vol 365 (6460) ◽  
pp. 1418-1424 ◽  
Author(s):  
Wenke He ◽  
Dongyang Wang ◽  
Haijun Wu ◽  
Yu Xiao ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Thermoelectric Materials ◽  
High Performance ◽  
Carrier Mobility ◽  
Figure Of Merit ◽  
Toxic Elements ◽  
Low Cost ◽  
Thermoelectric Performance ◽  
Tin Sulfide ◽  
Temperature Dependent ◽  
Earth Abundant

Thermoelectric technology allows conversion between heat and electricity. Many good thermoelectric materials contain rare or toxic elements, so developing low-cost and high-performance thermoelectric materials is warranted. Here, we report the temperature-dependent interplay of three separate electronic bands in hole-doped tin sulfide (SnS) crystals. This behavior leads to synergistic optimization between effective mass (m*) and carrier mobility (μ) and can be boosted through introducing selenium (Se). This enhanced the power factor from ~30 to ~53 microwatts per centimeter per square kelvin (μW cm−1 K−2 at 300 K), while lowering the thermal conductivity after Se alloying. As a result, we obtained a maximum figure of merit ZT (ZTmax) of ~1.6 at 873 K and an average ZT (ZTave) of ~1.25 at 300 to 873 K in SnS0.91Se0.09 crystals. Our strategy for band manipulation offers a different route for optimizing thermoelectric performance. The high-performance SnS crystals represent an important step toward low-cost, Earth-abundant, and environmentally friendly thermoelectrics.

Low-cost and eco-friendly Br-doped Cu7Sn3S10 thermoelectric compound with zT around unit

2021 ◽  
Author(s):  
Tingting Deng ◽  
Pengfei Qiu ◽  
Tong Xing ◽  
Zhengyang Zhou ◽  
Tian-Ran Wei ◽  
...  
Keyword(s):  
Toxic Elements ◽  
Low Cost ◽  
Thermoelectric Performance ◽  
Ternary Compounds ◽  
Earth Abundant

Cu-Sn-S ternary compounds have attracted great attention in thermoelectric community because they are composed of low-cost, earth-abundant, and non-toxic elements. Among them, Cu7Sn3S10 shows promising thermoelectric performance in the middle...

scholarly journals Achieving High Thermoelectric Performance in Rare-Earth Element-Free CaMg2Bi2 with High Carrier Mobility and Ultralow Lattice Thermal Conductivity

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Muchun Guo ◽  
Fengkai Guo ◽  
Jianbo Zhu ◽  
Li Yin ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Materials ◽  
Carrier Mobility ◽  
Lattice Thermal Conductivity ◽  
Low Cost ◽  
Thermoelectric Performance ◽  
Widespread Application ◽  
Compatibility Factor ◽  
High Carrier Mobility ◽  
High Carrier

CaMg2Bi2-based compounds, a kind of the representative compounds of Zintl phases, have uniquely inherent layered structure and hence are considered to be potential thermoelectric materials. Generally, alloying is a traditional and effective way to reduce the lattice thermal conductivity through the mass and strain field fluctuation between host and guest atoms. The cation sites have very few contributions to the band structure around the fermi level; thus, cation substitution may have negligible influence on the electric transport properties. What is more, widespread application of thermoelectric materials not only desires high ZT value but also calls for low-cost and environmentally benign constituent elements. Here, Ba substitution on cation site achieves a sharp reduction in lattice thermal conductivity through enhanced point defects scattering without the obvious sacrifice of high carrier mobility, and thus improves thermoelectric properties. Then, by combining further enhanced phonon scattering caused by isoelectronic substitution of Zn on the Mg site, an extraordinarily low lattice thermal conductivity of 0.51 W m-1 K-1 at 873 K is achieved in (Ca0.75Ba0.25)0.995Na0.005Mg1.95Zn0.05Bi1.98 alloy, approaching the amorphous limit. Such maintenance of high mobility and realization of ultralow lattice thermal conductivity synergistically result in broadly improvement of the quality factor β. Finally, a maximum ZT of 1.25 at 873 K and the corresponding ZTave up to 0.85 from 300 K to 873 K have been obtained for the same composition, meanwhile possessing temperature independent compatibility factor. To our knowledge, the current ZTave exceeds all the reported values in AMg2Bi2-based compounds so far. Furthermore, the low-cost and environment-friendly characteristic plus excellent thermoelectric performance also make the present Zintl phase CaMg2Bi2 more competitive in practical application.

scholarly journals Physical Intuition to Improve Electronic Properties of Thermoelectrics

2021 ◽  
Vol 9 ◽  
Author(s):  
Wei Yang Samuel Lim ◽  
Danwei Zhang ◽  
Solco Samantha Faye Duran ◽  
Xian Yi Tan ◽  
Chee Kiang Ivan Tan ◽  
...  
Keyword(s):  
High Performance ◽  
Carrier Mobility ◽  
Figure Of Merit ◽  
Lattice Thermal Conductivity ◽  
Charge Carrier Concentration ◽  
Advanced Materials ◽  
Commercial Application ◽  
Large Fluctuation ◽  
Theoretical Estimation ◽  
Earth Abundant

Thermoelectrics convert heat to electricity and vice versa. They are of technological importance in cooling and energy harvesting. Their performances are defined by figure of merit, zT. Decades of studies have largely focused on the development of novel and advanced materials reaching higher performance in devices. To date, the lack of sufficiently high-performance thermoelectrics, especially among Earth-abundant and lightweight materials, is one of the reasons why there is no broad commercial application of thermoelectric devices yet. This challenge is due to the complex correlations of parameters that make up the zT. Theoretical estimation can reveal the optimal charge carrier concentration, which can provide a good idea of doping compositions. Depending on the material characteristics, decoupling these intercorrelated parameters could be viable. Broadly speaking, increasing carrier mobility, inducing a large fluctuation in density of states (DOS) at the Fermi level, and lowering the lattice thermal conductivity lead to better thermoelectric performance. In this mini review, we provide a broad picture of electronic property optimization for thermoelectric materials. This work will be a useful guide to quickly take readers to the forefront of thermoelectric research.

scholarly journals Sodium-Doped Tin Sulfide Single Crystal: A Nontoxic Earth-Abundant Material with High Thermoelectric Performance

2018 ◽  
Vol 8 (20) ◽  
pp. 1800087 ◽  
Author(s):  
Hong Wu ◽  
Xu Lu ◽  
Guoyu Wang ◽  
Kunling Peng ◽  
Hang Chi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Thermoelectric Performance ◽  
Tin Sulfide ◽  
Earth Abundant ◽  
Sulfide Single Crystal

Designing high-performance n-type Mg3Sb2-based thermoelectric materials through forming solid solutions and biaxial strain

2018 ◽  
Vol 6 (41) ◽  
pp. 20454-20462 ◽  
Author(s):  
Juan Li ◽  
Shuai Zhang ◽  
Boyi Wang ◽  
Shichao Liu ◽  
Luo Yue ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Thermoelectric Performance ◽  
Biaxial Strain

Thermoelectric performance can be largely enhanced by forming solid solutions and biaxial strain.

Nanostructure controlled construction of high-performance thermoelectric materials of polymers and their composites

2018 ◽  
Vol 6 (45) ◽  
pp. 22381-22390 ◽  
Author(s):  
Yufeng Xue ◽  
Chunmei Gao ◽  
Lirong Liang ◽  
Xin Wang ◽  
Guangming Chen
Keyword(s):  
Thermoelectric Materials ◽  
High Performance ◽  
Thermoelectric Performance ◽  
Recent Advances

This review discusses recent advances in controlled fabrication of nanostructures and the enhanced thermoelectric performance of polymers and their composites.

Carbon nanotube fibers with enhanced longitudinal carrier mobility for high-performance all-carbon thermoelectric generators

Nanoscale ◽  
2019 ◽  
Vol 11 (36) ◽  
pp. 16919-16927 ◽  
Author(s):  
Taemin Lee ◽  
Kyung Tae Park ◽  
Bon-Cheol Ku ◽  
Heesuk Kim
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Carrier Mobility ◽  
Thermoelectric Performance ◽  
Thermoelectric Generators ◽  
Carbon Nanotube Fibers

We have demonstrated wet-spun CNT fibers with high thermoelectric performance by optimizing the longitudinal carrier mobility.

High-performance p-type elemental Te thermoelectric materials enabled by the synergy of carrier tuning and phonon engineering

2020 ◽  
Vol 8 (24) ◽  
pp. 12156-12168
Author(s):  
Decheng An ◽  
Shaoping Chen ◽  
Xin Zhai ◽  
Yuan Yu ◽  
Wenhao Fan ◽  
...  
Keyword(s):  
Thermoelectric Materials ◽  
High Performance ◽  
Figure Of Merit ◽  
Phonon Transport ◽  
P Type

An outstanding figure-of-merit zT ≈ 1.06 at 600 K for p-type elemental Te thermoelectrics is realized by synergistically tuning their carrier and phonon transport behaviors via a multicomponent alloying strategy.

Aqueous Chemical Synthesis and Consolidation of Size-Controlled Bi2Te3 Nanoparticles for Low-Cost and High-Performance Thermoelectric Materials

2019 ◽  
Vol 48 (5) ◽  
pp. 2700-2711 ◽  
Author(s):  
Tatsuichiro Nakamoto ◽  
Shun Yokoyama ◽  
Tomohisa Takamatsu ◽  
Koichi Harata ◽  
Kenichi Motomiya ◽  
...  
Keyword(s):  
Chemical Synthesis ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Low Cost ◽  
Size Controlled
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