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Title: Aqueous synthesis, doping, and processing of n-type Ag₂Se for high thermoelectric performance at near-room-temperature
Authors: Tee, Si Yin
Tan, Xian Yi
Wang, Xizu
Lee, Coryl Jing Jun
Win, Khin Yin
Ni, Xi Ping
Teo, Siew Lang
Seng, Debbie Hwee Leng
Tanaka, Yuki
Han, Ming-Yong
Keywords: Engineering::Materials
Issue Date: 2022
Source: Tee, S. Y., Tan, X. Y., Wang, X., Lee, C. J. J., Win, K. Y., Ni, X. P., Teo, S. L., Seng, D. H. L., Tanaka, Y. & Han, M. (2022). Aqueous synthesis, doping, and processing of n-type Ag₂Se for high thermoelectric performance at near-room-temperature. Inorganic Chemistry, 61(17), 6451-6458.
Project: 1527200023
Journal: Inorganic Chemistry
Abstract: Herein, we have successfully synthesized binary Ag2Se, composite Ag0:Ag2Se, and ternary Cu+:Ag2Se through an ambient aqueous-solution-based approach in a one-pot reaction at room temperature and atmospheric pressure without involving high-temperature heating, multiple-processes treatment, and organic solvents/surfactants. Effective controllability over phases and compositions/components are demonstrated with feasibility for large-scale production through an exquisite alteration in reaction parameters especially pH for enhancing and understanding thermoelectric properties. Thermoelectric ZT reaches 0.8-1.1 at near-room-temperature for n-type Ag2Se and Cu+ doping further improves to 0.9-1.2 over a temperature range of 300-393 K, which is the largest compared to that reported by wet chemistry methods. This improvement is related to the enhanced electrical conductivity and the suppressed thermal conductivity due to the incorporation of Cu+ into the lattice of Ag2Se at very low concentrations (x%Cu+:Ag2Se, x = 1.0, 1.5, and 2.0).
ISSN: 0020-1669
DOI: 10.1021/acs.inorgchem.2c00060
Rights: © 2022 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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