Enhancing the thermoelectric performance of Cu1.8S by Sb/Sn co-doping and incorporating multiscale defects to scatter heat-carrying phonons

2019 ◽  
Vol 7 (14) ◽  
pp. 4026-4031 ◽  
Author(s):  
Huaichao Tang ◽  
Hua-Lu Zhuang ◽  
Bowen Cai ◽  
Asfandiyar Asfandiyar ◽  
Jinfeng Dong ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Thermoelectric Performance ◽  
Co Doping

(Sb, Sn) co-doping optimizes the carrier concentration of Cu1.8S and constructs multiscale defects, leading to ZTmax of 1.2 at 773 K.

scholarly journals Substantial thermoelectric enhancement achieved by manipulating the band structure and dislocations in Ag and La co-doped SnTe

2021 ◽  
Author(s):  
Wenjing Xu ◽  
Zhongwei Zhang ◽  
Chengyan Liu ◽  
Jie Gao ◽  
Zhenyuan Ye ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carrier Concentration ◽  
Power Factor ◽  
Figure Of Merit ◽  
Performance Enhancement ◽  
Thermoelectric Performance ◽  
Electronic Band ◽  
Co Doping ◽  
High Carrier ◽  
Valence Bands

AbstractEco-friendly SnTe based thermoelectric materials are intensively studied recently as candidates to replace PbTe; yet the thermoelectric performance of SnTe is suppressed by its intrinsically high carrier concentration and high thermal conductivity. In this work, we confirm that the Ag and La co-doping can be applied to simultaneously enhance the power factor and reduce the thermal conductivity, contributing to a final promotion of figure of merit. On one hand, the carrier concentration and band offset between valence bands are concurrently reduced, promoting the power factor to a highest value of ∼2436 µW·m−1·K−2 at 873 K. On the other hand, lots of dislocations (∼3.16×107 mm−2) associated with impurity precipitates are generated, resulting in the decline of thermal conductivity to a minimum value of 1.87 W·m−1·K−1 at 873 K. As a result, a substantial thermoelectric performance enhancement up to zT ≈ 1.0 at 873 K is obtained for the sample Sn0.94Ag0.09La0.05Te, which is twice that of the pristine SnTe (zT ≈ 0.49 at 873 K). This strategy of synergistic manipulation of electronic band and microstructures via introducing rare earth elements could be applied to other systems to improve thermoelectric performance.

scholarly journals Enhanced thermoelectric performance through synergy of resonance levels and valence band convergence via Q/In (Q = Mg, Ag, Bi) co-doping

2018 ◽  
Vol 6 (6) ◽  
pp. 2507-2516 ◽  
Author(s):  
Li Juan Zhang ◽  
Peng Qin ◽  
Chao Han ◽  
Jian Li Wang ◽  
Zhen Hua Ge ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Valence Band ◽  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Chemical Doping ◽  
Co Doping ◽  
Synergetic Effects

Remarkably improved thermoelectric properties are achieved through the synergetic effects of the resonance levels, the valence band convergence, and the carrier concentration optimization by chemical doping.

Improved Thermoelectric Performance for β-Zn4Sb3 by Na/Zn Co-doping

2022 ◽  
Author(s):  
Jie Zheng ◽  
Jiali Chen ◽  
Yu Tang ◽  
Kaiyuan Shen ◽  
Yujie Xiang ◽  
...  
Keyword(s):  
Thermoelectric Performance ◽  
Co Doping

scholarly journals Enhancement of Thermoelectric Performance in CuSbSe 2 Nanoplate‐Based Pellets by Texture Engineering and Carrier Concentration Optimization

Small ◽  
2018 ◽  
Vol 14 (50) ◽  
pp. 1803092 ◽  
Author(s):  
Yubo Luo ◽  
Chengfeng Du ◽  
Qinghua Liang ◽  
Yun Zheng ◽  
Beibei Zhu ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Thermoelectric Performance

scholarly journals Synergistic effects of zirconium- and aluminum co-doping on the thermoelectric performance of zinc oxide

2019 ◽  
Vol 39 (4) ◽  
pp. 1222-1229 ◽  
Author(s):  
Kiryl V. Zakharchuk ◽  
David M. Tobaldi ◽  
Xingxing Xiao ◽  
Wenjie Xie ◽  
Sergey M. Mikhalev ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Synergistic Effects ◽  
Thermoelectric Performance ◽  
Co Doping

scholarly journals Enhancing the thermoelectric performance of Cu3SnS4-based solid solutions through coordination of the Seebeck coefficient and carrier concentration

2017 ◽  
Vol 5 (35) ◽  
pp. 18808-18815 ◽  
Author(s):  
Yuanbo Yang ◽  
Pengzhan Ying ◽  
Jinzhi Wang ◽  
Xianglian Liu ◽  
Zhengliang Du ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Carrier Concentration ◽  
Solid Solutions ◽  
Thermoelectric Performance

Through coordination of the Seebeck coefficient and carrier concentration in Cu3SnS4, TE performance improves significantly with the ZT value of 0.75 at 790 K.

Oxygen adsorption and its influence on the thermoelectric performance of polycrystalline SnSe

2019 ◽  
Vol 7 (34) ◽  
pp. 10507-10513 ◽  
Author(s):  
Mengmeng Zhang ◽  
Dongyang Wang ◽  
Cheng Chang ◽  
Tao Lin ◽  
Kedong Wang ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Oxygen Adsorption ◽  
Thermoelectric Performance

Oxygen is adsorbed when SnSe is exposed to air and it acts as a hole-like acceptor. The thermoelectric performance of n-type polycrystalline SnSe can be promoted through optimizing carrier concentration via preventing oxygen adsorption.

Enhanced thermoelectric performance of layered SnS crystals: the synergetic effect of temperature and carrier concentration

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 56382-56390 ◽  
Author(s):  
Bao-Zhen Sun ◽  
Zuju Ma ◽  
Chao He ◽  
Kechen Wu
Keyword(s):  
Carrier Concentration ◽  
Synergetic Effect ◽  
Thermoelectric Performance ◽  
Effect Of Temperature ◽  
Effects Of Temperature

The synergistic deployment of the effects of temperature and carrier concentration raises the ZT of SnS to a high value (1.61 ± 0.02).

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