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

Sato, Kosuke; Singh, Saurabh; Yamazaki, Itsuki; Hirata, Keisuke; Ang, Artoni Kevin R.; Matsunami, Masaharu; Takeuchi, Tsunehiro

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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DOI

10.1063/5.0171888

Journal Article | Published | English

Author

Sato, Kosuke; Singh, Saurabh^ISTA ; Yamazaki, Itsuki; Hirata, Keisuke; Ang, Artoni Kevin R.; Matsunami, Masaharu; Takeuchi, Tsunehiro

Department

Ibáñez Group

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.

Keywords

General Physics and Astronomy

Publishing Year

2023

Date Published

2023-12-01

Journal Title

AIP Advances

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

Issue

Article Number

125206

eISSN

2158-3226

IST-REx-ID

14777

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, 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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