Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/174581
Title: Compositionally tuned hybridization of n-type Ag0: Ag2Se under ambient conditions towards excellent thermoelectric properties at room temperature
Authors: Tee, Si Yin
Ponsford, Daniel
Tan, Xian Yi
Wang, Xiaobai
Lay, Chee Leng
Lee, Coryl Jing Jun
Ni, Xi Ping
Seng, Debbie Hwee Leng
Thitsartarn, Warintorn
Guan, Guijian
Han, Ming-Yong
Keywords: Chemistry
Issue Date: 2023
Source: Tee, S. Y., Ponsford, D., Tan, X. Y., Wang, X., Lay, C. L., Lee, C. J. J., Ni, X. P., Seng, D. H. L., Thitsartarn, W., Guan, G. & Han, M. (2023). Compositionally tuned hybridization of n-type Ag0: Ag2Se under ambient conditions towards excellent thermoelectric properties at room temperature. Materials Chemistry Frontiers, 7(12), 2411-2418. https://dx.doi.org/10.1039/d3qm00123g
Project: 21-815515 
I1801E0024 
Journal: Materials Chemistry Frontiers 
Abstract: It is important to tune the thermoelectric properties of n-type thermoelectric materials, orthorhombic Ag2Se by nanoscale hybridization apart from conventional alloying or ion-doping approaches. In this work, we report the thermoelectric performance of a series of n-type Ag0 : Ag2Se materials prepared through a surfactant-free, aqueous solution-based approach under ambient conditions. This strategy enables fine control over phases and compositions through nanoscale hybridization using silver nanoparticles for the first time, yet remains applicable to large-scale production methods. By prolonging reaction times, the synthetic process is carefully developed/optimized to adjust the excess of the Ag0 phase, in order to enhance the thermoelectric properties. Hybridization of Ag0 and Ag2Se with increasing amounts of Ag0 (1.96%, 4.31%, 6.10%, 15.97%, 45.80% and 50.86% Ag0) results in not only increased electrical conductivities but also decreased Seebeck coefficients. The optimal excess of Ag0 is determined to be 1.96% after 7 days of reaction, with a high ZT value of near unity at 333 K. The ZT values realized in this study exceed those hitherto reported for β-Ag2Se synthesized via wet chemistry methods at room temperature.
URI: https://hdl.handle.net/10356/174581
ISSN: 2052-1537
DOI: 10.1039/d3qm00123g
Schools: School of Materials Science and Engineering 
Organisations: Institute of Materials Research and Engineering, A*STAR 
Rights: © The Authors. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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