Unveiling crucial chemical processing parameters influencing the performance of solution-processed inorganic thermoelectric materials

Fiedler C, Calcabrini M, Liu Y, Ibáñez M. 2024. Unveiling crucial chemical processing parameters influencing the performance of solution-processed inorganic thermoelectric materials. Angewandte Chemie - International Edition., e202402628.

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Abstract
Production of thermoelectric materials from solution-processed particles involves the synthesis of particles, their purification and densification into pelletized material. Chemical changes that occur during each one of these steps render them performance determining. Particularly the purification steps, bypassed in conventional solid-state synthesis, are the cause for large discrepancies among similar solution-processed materials. In present work, the investigation focuses on a water-based surfactant free solution synthesis of SnSe, a highly relevant thermoelectric material. We show and rationalize that the number of leaching steps, purification solvent, annealing, and annealing atmosphere have significant influence on the Sn : Se ratio and impurity content in the powder. Such compositional changes that are undetectable by conventional characterization techniques lead to distinct consolidated materials with different types and concentration of defects. Additionally, the profound effect on their transport properties is demonstrated. We emphasize that understanding the chemistry and identifying key chemical species and their role throughout the process is paramount for optimizing material performance. Furthermore, we aim to demonstrate the necessity of comprehensive reporting of these steps as a standard practice to ensure material reproducibility.
Publishing Year
Date Published
2024-04-16
Journal Title
Angewandte Chemie - International Edition
Acknowledgement
ISTA and the Werner Siemens Foundation financially supported this work. The Scientific Service Units (SSU) of ISTA supported this research through resources provided by the Electron Microscopy Facility (EMF), NMR Facility and the Lab Support Facility (LSF). Dr. Krishnendu Maji at ISTA aided in this work through XRD analysis of the crystal phase of SnSe. Y.L. acknowledges funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 754411, the National Natural Science Foundation of China (NSFC) (Grants No. 22209034). M.C. received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 665385.
Article Number
e202402628
ISSN
eISSN
IST-REx-ID

Cite this

Fiedler C, Calcabrini M, Liu Y, Ibáñez M. Unveiling crucial chemical processing parameters influencing the performance of solution-processed inorganic thermoelectric materials. Angewandte Chemie - International Edition. 2024. doi:10.1002/anie.202402628
Fiedler, C., Calcabrini, M., Liu, Y., & Ibáñez, M. (2024). Unveiling crucial chemical processing parameters influencing the performance of solution-processed inorganic thermoelectric materials. Angewandte Chemie - International Edition. Wiley. https://doi.org/10.1002/anie.202402628
Fiedler, Christine, Mariano Calcabrini, Yu Liu, and Maria Ibáñez. “Unveiling Crucial Chemical Processing Parameters Influencing the Performance of Solution-Processed Inorganic Thermoelectric Materials.” Angewandte Chemie - International Edition. Wiley, 2024. https://doi.org/10.1002/anie.202402628.
C. Fiedler, M. Calcabrini, Y. Liu, and M. Ibáñez, “Unveiling crucial chemical processing parameters influencing the performance of solution-processed inorganic thermoelectric materials,” Angewandte Chemie - International Edition. Wiley, 2024.
Fiedler C, Calcabrini M, Liu Y, Ibáñez M. 2024. Unveiling crucial chemical processing parameters influencing the performance of solution-processed inorganic thermoelectric materials. Angewandte Chemie - International Edition., e202402628.
Fiedler, Christine, et al. “Unveiling Crucial Chemical Processing Parameters Influencing the Performance of Solution-Processed Inorganic Thermoelectric Materials.” Angewandte Chemie - International Edition, e202402628, Wiley, 2024, doi:10.1002/anie.202402628.
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