Enhancing thermoelectric performance of Solution-Processed polycrystalline SnSe with PbSe nanocrystals
Article
Liu, Yu, Lee, Seungho, Fiedler, Christine, Spadaro, Maria Chiara, Chang, Cheng, Li, Mingquan, Hong, Min, Arbiol, Jordi and Ibanez, Maria. 2024. "Enhancing thermoelectric performance of Solution-Processed polycrystalline SnSe with PbSe nanocrystals." Chemical Engineering Journal. 490. https://doi.org/10.1016/j.cej.2024.151405
Article Title | Enhancing thermoelectric performance of Solution-Processed polycrystalline SnSe with PbSe nanocrystals |
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ERA Journal ID | 3854 |
Article Category | Article |
Authors | Liu, Yu, Lee, Seungho, Fiedler, Christine, Spadaro, Maria Chiara, Chang, Cheng, Li, Mingquan, Hong, Min, Arbiol, Jordi and Ibanez, Maria |
Journal Title | Chemical Engineering Journal |
Journal Citation | 490 |
Number of Pages | 9 |
Year | 2024 |
Publisher | Elsevier |
Place of Publication | Australia |
ISSN | 1385-8947 |
1873-3212 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.cej.2024.151405 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1385894724028924 |
Abstract | There is a growing interest in cost-effective polycrystalline SnSe-based thermoelectric (TE) materials, which are able to replace the high performance but mechanically fragile and costly single-crystalline SnSe. In this study, we present a low-temperature solution-based approach to produce SnSe-PbSe nanocomposites with outstanding TE performance. Our method involves combining surfactant-free SnSe particles with oleate-capped PbSe nanocrystals in specific ratios, followed by thermal annealing and consolidation using spark plasma sintering. These nanocomposites are characterized by distinct compositional and structural properties that significantly impact their transport properties. In particular, the addition of oleate-capped PbSe nanocrystals results in: i) a reduction in the electrostatically adsorbed Na at the surface of the SnSe particles; ii) a reduction of Sn vacancies due to alloying with Pb; iii) an increase in grain boundary density; and iv) the formation of PbSnSe secondary phases. Notably, the SnSe-2.5 %PbSe nanocomposites demonstrate a 30 % decrease in thermal conductivity compared to that of the SnSe matrix. This reduction contributes to a maximum figure of merit (zT) of 1.75 at 788 K with a high average zT value of ca. 1.2 in the medium temperature range of 573–773 K. These values represent one of the highest reported in polycrystalline SnSe materials, showcasing the potential of our fabricated SnSe-PbSe nanocomposites for cost-effective TE applications. © 2024 The Authors |
Keywords | Nanocomposites; Tin selenide ; Solution processing ; Thermoelectricity; Thermal conductivity |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Byline Affiliations | Hefei University of Technology, China |
Institute of Science and Technology Austria, Austria | |
Catalan Institute of Nanoscience and Nanotechnology, Spain | |
Beihang University, China | |
School of Engineering | |
Centre for Future Materials | |
Catalan Institution for Research and Advanced Studies (ICREA), Spain |
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https://research.usq.edu.au/item/z852q/enhancing-thermoelectric-performance-of-solution-processed-polycrystalline-snse-with-pbse-nanocrystals
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