In:
Materials Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 7, No. 12 ( 2023), p. 2411-2418
Abstract:
It is important to tune the thermoelectric properties of n-type thermoelectric materials, orthorhombic Ag 2 Se 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 Ag 0 : Ag 2 Se 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 Ag 0 phase, in order to enhance the thermoelectric properties. Hybridization of Ag 0 and Ag 2 Se with increasing amounts of Ag 0 (1.96%, 4.31%, 6.10%, 15.97%, 45.80% and 50.86% Ag 0 ) results in not only increased electrical conductivities but also decreased Seebeck coefficients. The optimal excess of Ag 0 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-Ag 2 Se synthesized via wet chemistry methods at room temperature.
Type of Medium:
Online Resource
ISSN:
2052-1537
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2867881-3
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