Improvement of thermoelectric performance of flexible compound Ag2S0.55Se0.45 by means of partial V-substitution for Ag

Sato K, Singh S, Yamazaki I, Hirata K, Ang AKR, Matsunami M, Takeuchi T. 2023. Improvement of thermoelectric performance of flexible compound Ag2S0.55Se0.45 by means of partial V-substitution for Ag. AIP Advances. 13(12), 125206.

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Journal Article | Published | English
Author
Sato, Kosuke; Singh, SaurabhISTA ; Yamazaki, Itsuki; Hirata, Keisuke; Ang, Artoni Kevin R.; Matsunami, Masaharu; Takeuchi, Tsunehiro
Department
Abstract
The effects of the partial V-substitution for Ag on the thermoelectric (TE) properties are investigated for a flexible semiconducting compound Ag2S0.55Se0.45. Density functional theory calculations predict that such a partial V-substitution constructively modifies the electronic structure near the bottom of the conduction band to improve the TE performance. The synthesized Ag1.97V0.03S0.55Se0.45 is found to possess a TE dimensionless figure-of-merit (ZT) of 0.71 at 350 K with maintaining its flexible nature. This ZT value is relatively high in comparison with those reported for flexible TE materials below 360 K. The increase in the ZT value is caused by the enhanced absolute value of the Seebeck coefficient with less significant variation in electrical resistivity. The high ZT value with the flexible nature naturally allows us to employ the Ag1.97V0.03S0.55Se0.45 as a component of flexible TE generators.
Publishing Year
Date Published
2023-12-01
Journal Title
AIP Advances
Publisher
AIP Publishing
Acknowledgement
This work received financial support partially from Japan Science and Technology Agency (JST) CREST Grant No. JPMJCR18I2, Japan. The powder-XRD experiments were conducted at BL5S2 of Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation, Aichi, Japan (Proposal No. 202301057).
Volume
13
Issue
12
Article Number
125206
eISSN
IST-REx-ID

Cite this

Sato K, Singh S, Yamazaki I, et al. Improvement of thermoelectric performance of flexible compound Ag2S0.55Se0.45 by means of partial V-substitution for Ag. AIP Advances. 2023;13(12). doi:10.1063/5.0171888
Sato, K., Singh, S., Yamazaki, I., Hirata, K., Ang, A. K. R., Matsunami, M., & Takeuchi, T. (2023). Improvement of thermoelectric performance of flexible compound Ag2S0.55Se0.45 by means of partial V-substitution for Ag. AIP Advances. AIP Publishing. https://doi.org/10.1063/5.0171888
Sato, Kosuke, Saurabh Singh, Itsuki Yamazaki, Keisuke Hirata, Artoni Kevin R. Ang, Masaharu Matsunami, and Tsunehiro Takeuchi. “Improvement of Thermoelectric Performance of Flexible Compound Ag2S0.55Se0.45 by Means of Partial V-Substitution for Ag.” AIP Advances. AIP Publishing, 2023. https://doi.org/10.1063/5.0171888.
K. Sato et al., “Improvement of thermoelectric performance of flexible compound Ag2S0.55Se0.45 by means of partial V-substitution for Ag,” AIP Advances, vol. 13, no. 12. AIP Publishing, 2023.
Sato K, Singh S, Yamazaki I, Hirata K, Ang AKR, Matsunami M, Takeuchi T. 2023. Improvement of thermoelectric performance of flexible compound Ag2S0.55Se0.45 by means of partial V-substitution for Ag. AIP Advances. 13(12), 125206.
Sato, Kosuke, et al. “Improvement of Thermoelectric Performance of Flexible Compound Ag2S0.55Se0.45 by Means of Partial V-Substitution for Ag.” AIP Advances, vol. 13, no. 12, 125206, AIP Publishing, 2023, doi:10.1063/5.0171888.
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