Journal ArticleDOI
Order-disorder transition-induced band nestification in AgBiSe2–CuBiSe2 solid solutions for superior thermoelectric performance
Hanhwi Jang,Stanley Abbey,Woo Hyun Nam,Brakowaa Frimpong,Chien Viet Nguyen,Sung-Jae Joo,Ho Sun Shin,Jae Yong Song,Eugene N. Cho,Moohyun Kim,Yeon Sik Jung,Min-Wook Oh +11 more
TLDR
In this paper, a high power factor can be achieved by incorporating Cu into the ABS system via the nestification of conduction bands when a disordering between Ag and Bi occurs, which simultaneously increases the density-of-states effective mass and carrier concentration while not reducing the carrier mobility significantly.Abstract:
Despite the fact that research into most high-performance thermoelectric (TE) materials is focused on tellurides, compelling demand has arisen to replace tellurium (Te) with selenium (Se) due to the scarcity of Te. Silver bismuth diselenide (AgBiSe2, ABS) has been widely studied in relation to thermoelectric applications due to its intrinsically low thermal conductivity. However, its low power factor (PF) has been considered as an underlying issue preventing improvements of the TE properties of ABS. Here, it is demonstrated that a high PF can be achieved by incorporating Cu into the ABS system via the nestification of conduction bands when a disordering between Ag and Bi occurs. Degenerate electronic bands simultaneously increase the density-of-states effective mass and carrier concentration while not reducing the carrier mobility significantly. Therefore, improved TE performance with a maximum PF of 8.2 μW cm−1 K−2 and a peak zT value of 1.14 was achieved at 773 K, opening a new horizon for the development of environmentally benign TE materials with high performance capabilities.read more
Citations
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Journal ArticleDOI
Medium Entropy-Enabled High Performance Cubic GeTe Thermoelectrics.
Shizhen Zhi,Jibiao Li,Jibiao Li,Lipeng Hu,Junqin Li,Ning Li,Haijun Wu,Haijun Wu,Fusheng Liu,Chaohua Zhang,Weiqin Ao,Heping Xie,Xinbing Zhao,Stephen J. Pennycook,Tiejun Zhu +14 more
TL;DR: Medium‐entropy alloying is implemented to suppress the phase transition and achieve the cubic GeTe with ultralow lattice thermal conductivity yet decent carrier mobility, and a record‐high Vickers hardness of 270 is attained.
Journal ArticleDOI
Thermoelectric materials taking advantage of spin entropy: lessons from chalcogenides and oxides
Sylvie Hébert,Ramzy Daou,Antoine Maignan,Subarna Das,Aritra Banerjee,Yannick Klein,Cédric Bourgès,Naohito Tsujii,Takao Mori,Takao Mori +9 more
TL;DR: The interplay between charges and spins may influence the dynamics of the carriers and determine their thermoelectric properties as mentioned in this paper, and in that respect, magneto-thermoelectoric power MTEP, i.e. the measur...
Journal ArticleDOI
Recent Advances in Designing Thermoelectric Materials
TL;DR: In this article , the most promising approach is the conversion of coal-to-renewable energy sources to clean and renewable sources and newer approaches towards efficient energy management are presented.
Journal ArticleDOI
Regulating Te Vacancies through Dopant Balancing via Excess Ag Enables Rebounding Power Factor and High Thermoelectric Performance in p-Type PbTe
Hanhwi Jang,Jongho Park,Ho Seong Lee,Byungki Ryu,Su Dong Park,Hyeon Ah Ju,Sang Hyeok Yang,Young-Min Kim,Woo Hyun Nam,Heng Wang,James P. Male,Gerald Jeffrey Snyder,Minjoon Kim,Yeon Sik Jung,Min-Wook Oh +14 more
TL;DR: In this article, a high thermoelectric dimensionless figure of merit, zT ≈ 2.1 at 723 K, was achieved by suppressing the vacancy formation via dopant balancing.
Journal Article
Achieving high power factor and output power density in p-type half-Heuslers Nb
Ran He,Daniel Kraemer,Jun Mao,Lingping Zeng,Qing Jie,Yucheng Lan,Chunhua Li,Jing Shuai,Hee Seok Kim,Yuan Liu,David Broido,Ching-Wu Chu,Gang Chen,Zhifeng Ren +13 more
TL;DR: In this paper, the authors achieved a peak power factor of ∼106 μW⋅cm−1⋆K−2 by increasing the hot pressing temperature up to 1,373 K in the p-type half-Heusler Nb0.95Ti0.05FeSb.
References
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Journal ArticleDOI
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