Low Thermal Conductivity and High Thermoelectric Performance in (GeTe)1–2x(GeSe)x(GeS)x: Competition between Solid Solution and Phase Separation

2017 ◽  
Vol 139 (27) ◽  
pp. 9382-9391 ◽  
Author(s):  
Manisha Samanta ◽  
Kanishka Biswas
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Phase Separation ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity

scholarly journals High thermoelectric performance enabled by convergence of nested conduction bands in Pb7Bi4Se13 with low thermal conductivity

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Lei Hu ◽  
Yue-Wen Fang ◽  
Feiyu Qin ◽  
Xun Cao ◽  
Xiaoxu Zhao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Waste Heat ◽  
Low Frequency ◽  
Thermoelectric Performance ◽  
Environmental Crisis ◽  
Quality Factors ◽  
Thermoelectric Efficiency ◽  
Low Thermal Conductivity ◽  
Conduction Bands ◽  
Thermoelectric Energy

AbstractThermoelectrics enable waste heat recovery, holding promises in relieving energy and environmental crisis. Lillianite materials have been long-term ignored due to low thermoelectric efficiency. Herein we report the discovery of superior thermoelectric performance in Pb7Bi4Se13 based lillianites, with a peak figure of merit, zT of 1.35 at 800 K and a high average zT of 0.92 (450–800 K). A unique quality factor is established to predict and evaluate thermoelectric performances. It considers both band nonparabolicity and band gaps, commonly negligible in conventional quality factors. Such appealing performance is attributed to the convergence of effectively nested conduction bands, providing a high number of valley degeneracy, and a low thermal conductivity, stemming from large lattice anharmonicity, low-frequency localized Einstein modes and the coexistence of high-density moiré fringes and nanoscale defects. This work rekindles the vision that Pb7Bi4Se13 based lillianites are promising candidates for highly efficient thermoelectric energy conversion.

Low Thermal Conductivity and Enhanced Thermoelectric Performance in In and Lu Double-Filled CoSb3 Skutterudites

2011 ◽  
Vol 40 (5) ◽  
pp. 611-614 ◽  
Author(s):  
G. D. Tang ◽  
Z. H. Wang ◽  
X. N. Xu ◽  
Y. He ◽  
L. Qiu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity

Ultra-low thermal conductivity and high thermoelectric performance realized in a Cu3SbSe4 based system

2021 ◽  
Vol 5 (1) ◽  
pp. 324-332
Author(s):  
J. M. Li ◽  
H. W. Ming ◽  
B. L. Zhang ◽  
C. J. Song ◽  
L. Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity ◽  
Sn Doping ◽  
Temperature Range ◽  
System P

Cu3SbSe4-Based materials were fabricated through Sn-doping and AgSb0.98Ge0.02Se2 incorporation and their thermoelectric properties were investigated in the temperature range from 300 K to 675 K.

Large reduction of thermal conductivity leading to enhanced thermoelectric performance in p-type Mg3Bi2–YbMg2Bi2 solid solutions

2019 ◽  
Vol 7 (2) ◽  
pp. 434-440 ◽  
Author(s):  
Ting Zhou ◽  
Jun Mao ◽  
Jing Jiang ◽  
Shaowei Song ◽  
Hangtian Zhu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Thermoelectric Property ◽  
Solid Solutions ◽  
Thermoelectric Performance ◽  
Large Reduction ◽  
P Type

The thermoelectric property of YbMg2Bi2–Mg3Bi2 solid solution is studied.

Thermoelectric performance of Cu1−x−δAgxInTe2 diamond-like materials with a pseudocubic crystal structure

2016 ◽  
Vol 3 (9) ◽  
pp. 1167-1177 ◽  
Author(s):  
Ruiheng Liu ◽  
Yuting Qin ◽  
Nian Cheng ◽  
Jiawei Zhang ◽  
Xun Shi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Solid Solution ◽  
Electrical Transport ◽  
Lattice Thermal Conductivity ◽  
Thermoelectric Performance ◽  
Valence Bands

In a tetragonal chalcopyrite solid solution Cu1−xAgxInTe2 (x = 0–0.5), a pseudocubic structure is realized at x ≈ 0.2. The degenerate valence bands influence electrical transport and lattice thermal conductivity. The highest ZT of 1.24 was obtained at x = 0.2 and δ = 0.05.

scholarly journals SnTe–AgBiTe2 as an efficient thermoelectric material with low thermal conductivity

2014 ◽  
Vol 2 (48) ◽  
pp. 20849-20854 ◽  
Author(s):  
Gangjian Tan ◽  
Fengyuan Shi ◽  
Hui Sun ◽  
Li-Dong Zhao ◽  
Ctirad Uher ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Seebeck Coefficient ◽  
Thermoelectric Material ◽  
Lattice Thermal Conductivity ◽  
Alloying Effect ◽  
Low Thermal Conductivity ◽  
Interface Scattering

SnTe–AgBiTe2 is not only a solid solution but a nanocomposite. The alloying effect coupled with intense interface scattering leads to considerably decreased lattice thermal conductivity. Bi is much more powerful in neutralizing holes than Sb, giving rise to a much higher Seebeck coefficient. A high ZT was then obtained.

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